Zebra MC3300x troubleshooting guide: errors, faults and fixes

Short answer: According to Zebra, this flashing indicates a charging error: temperature too low or too high, or charging that lasts too long without finishing (usually eight hours). Let the mobile computer return to a room between 0 °C and 40 °C, then restart charging.

Likely cause

The charging light table in the MC3300x reference guide (Android 11) and the quick start guide associate red flashing rapidly with a “charging error”: temperature out of range, or charging that does not complete after about eight hours.

Caution: Zebra says to follow the battery safety guidelines in the MC3300x product reference guide and to charge batteries only between 0 °C and 40 °C.

What to do

1. Remove the mobile computer from the cradle or cable and let it return to room temperature.
2. Restart charging in a room between 0 °C and 40 °C, the charging range specified by Zebra.
3. Move the cradle away from heat sources: according to the guide, at around 37 °C the mobile computer or cradle may suspend and then resume charging to keep the battery at a safe temperature, and the light indicates this.
4. If the error returns at normal temperature, check the battery's condition in Battery Manager (see battery at end of life).

Sources: Charging Indicators (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) · Charging Temperature (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) · Charging the Device (opens in a new window) – MC3300x Mobile Computer Quick Start Guide (MN-003567-01EN Rev. A) (official documentation).

Short answer: This is not a fault. According to Zebra, the notification light turns blue when an app (messaging, VoIP…) sends a notification or when the mobile computer is connected to a Bluetooth device.

Likely cause

The reference guide describes the “Blink light” function: the notification light comes on blue for a programmable app notification or a Bluetooth connection. The quick start guide states “Flashing blue: indicates that an app notification has been received”.

What to do

1. Open the notification panel to see which app sent the notification.
2. If a Bluetooth device (scanner, headset) is connected, the blue light is normal.
3. To turn this light off: Settings > Apps & notifications > Notifications > Advanced, then tap Blink light. Light notifications are enabled by default.

The menu labels are those in the English Zebra guide; they appear translated if the mobile computer is set to French.

Sources: Blink Light (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) · Charging/notification lights (opens in a new window) – MC3300x mobile computer quick start guide (MN-003567-01FR Rev. A) (official documentation).

Short answer: Zebra states that this message appears every time an unsupported battery is used in the MC3300x and that it cannot be disabled. The older MC32N0 PowerPrecision batteries are not compatible: install a battery from the MC33 range.

Likely cause

The quick start guide states that the MC3300x is not compatible with the MC32N0 PowerPrecision batteries and that an incorrect battery triggers a recurring message that cannot be disabled.

Caution: Zebra reminds you to follow the battery safety guidelines described in the MC3300x product reference guide.

What to do

1. Remove the battery and read its part number on the label.
2. MC3300x-G (gun-grip): use a 7,000 mAh or 5,200 mAh PowerPrecision+ battery.
3. MC3300x-R and MC3300x-S: both of these batteries are suitable, as is the 2,740 mAh standard battery.
4. The Zebra data sheet states that the MC3300x remains compatible with the 2,740 mAh (1X) and 5,200 mAh (2X) batteries of the first-generation MC3300.

Sources: Installing the Battery (opens in a new window) – MC3300x Mobile Computer Quick Start Guide (MN-003567-01EN Rev. A) · Incorrect battery message (opens in a new window) – MC3300x mobile computer quick start guide (MN-003567-01FR Rev. A) · Battery (opens in a new window) – Product Spec Sheet – MC3300x Mobile Computer (official documentation).

Short answer: The Zebra guide sets three thresholds: below 15%, a notification prompts you to connect the mobile computer to power; below 8%, the mobile computer again displays a notice prompting you to connect it; below 6%, the mobile computer switches off. Place it in its cradle or on its cable as soon as the first alert appears.

Likely cause

“Low Battery Notification” section of the reference guide: notification below 15%, a new notice prompting you to connect the mobile computer below 8%, shutdown below 6% (critical level).

What to do

1. Connect the mobile computer to a cradle or charging cable and check that the light turns solid orange.
2. Check the exact level: Settings > About phone > Battery Information, or open the Battery Manager app.
3. In a cold store, Zebra states that below 0 °C the battery level displayed may be lower than the actual level.
4. If the alert returns very soon after a full charge, see the battery runs down too quickly.

Sources: Low Battery Notification (opens in a new window) · Checking Battery Status (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) (official documentation).

Short answer: Open an app with an active input field: according to Zebra, the scan button and the trigger only start capture if a scanning application is enabled. If the beam comes on without decoding, check that the barcode's symbology is ticked in the DataWedge profile.

Likely cause

The quick start guide states that the scan button, the trigger (MC3300x-G) and the side button only trigger capture when a scanning application is enabled. The DataWedge documentation points out that the barcode's symbology must be enabled in the profile's decoders.

What to do

1. Open an app, place the cursor in a text field, point the top of the mobile computer at the barcode and press and hold the scan button or the trigger.
2. Imager: the red aiming pattern should come on. A successfully read barcode is indicated by default by the green scan lights and a beep.
3. SE965 laser scanner: the scan line must cross all the bars and spaces of the barcode.
4. Test in the DataWedge Demonstration app: press the programmable button or tap the yellow button. If scanning works there but not in your application, see data not received.
5. In DataWedge, open the profile, tap Configure scanner settings > Decoders and tick the barcode's symbology. Common formats are enabled by default.
6. Check that DataWedge is enabled: DataWedge enabled box in the DataWedge settings.

According to the data sheet, the MC3300x is available with three scan engines: SE965 laser (1D), SE4720/SE4770 imager (1D/2D) and SE4850 ERI extended-range imager, depending on the form factor of the mobile computer.

Sources: Scanning with the Internal Imager (opens in a new window) – MC3300x Mobile Computer Quick Start Guide (MN-003567-01EN Rev. A) · Scanning with the Laser Scanner (opens in a new window) – MC3300x Mobile Computer Quick Start Guide (MN-003567-01EN Rev. A) · DataWedge Demonstration (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) · Barcode Input (opens in a new window) – Zebra TechDocs – DataWedge · DataWedge Settings (opens in a new window) – Zebra TechDocs – DataWedge · Data Capture (opens in a new window) – Product Spec Sheet – MC3300x Mobile Computer (official documentation).

Short answer: The mobile computer is in picklist mode (Picklist): according to Zebra, it then only decodes the barcode touched by the centre of the aiming pattern. Aim precisely, or disable this mode in DataWedge if your application does not need it.

Likely cause

The quick start guide explains that in picklist mode the mobile computer only decodes when the centre of the crosshair touches the barcode. In DataWedge, the Picklist parameter accepts Disable, Hardware Picklist or Software Picklist.

What to do

1. Place the centre of the crosshair on the barcode you want, especially on labels that carry several barcodes.
2. For testing, the DataWedge Demonstration app has an icon that switches between picklist mode and normal scanning.
3. To read any barcode in the field of view, set Picklist to Disable in the reader parameters (Reader params) of the application's DataWedge profile.

Sources: Scanning with the Internal Imager (opens in a new window) – MC3300x Mobile Computer Quick Start Guide (MN-003567-01EN Rev. A) · DataWedge Demonstration (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) · Barcode Input (opens in a new window) – Zebra TechDocs – DataWedge (official documentation).

Short answer: According to Zebra's DataWedge FAQ, the beam comes on thanks to the default profile Profile0, but this profile does not know where to send the data for your application. Create a DataWedge profile associated with the application, with keystroke or Intent output.

Likely cause

Zebra explains that, without a profile associated with the application or with an incorrectly configured input/output, DataWedge uses Profile0: the scan takes place but the data does not reach the application.

What to do

1. Check scanning in the DataWedge Demonstration app: if it works, the scanner is not the cause.
2. In DataWedge, create a profile and associate your application with it. An application can only belong to one profile.
3. In this profile, enable the appropriate output: Keystroke output (tick box) for keyboard entry, or Intent if the application is developed for it.
4. In the profile's basic data formatting, the Send data option must remain ticked (it is ticked by default).
5. Just after a restart, give DataWedge a few seconds to initialise before scanning.

If Profile0 is disabled, Zebra states that scanning is impossible in applications that do not have a dedicated profile.

Sources: Frequently Asked Questions (opens in a new window) · DataWedge Profiles (opens in a new window) · Keystroke Output (opens in a new window) · Basic Data Formatting (opens in a new window) – Zebra TechDocs – DataWedge (official documentation).

Short answer: In the application's DataWedge profile, open Basic Data Formatting and tick “Send ENTER key”: according to Zebra, this option adds an Enter character at the end of the data. “Send TAB key” adds a tab.

Likely cause

The DataWedge guide describes the basic formatting options: prefix, suffix, sending the data, sending as hexadecimal, adding a tab or an Enter. Without formatting enabled, the data goes to the output unchanged.

What to do

1. Open DataWedge, then the profile associated with your application.
2. In the Keystroke output, open Basic Data Formatting.
3. Tick Send ENTER key (or Send TAB key to move to the next field).
4. To add fixed characters, fill in Prefix to data or Suffix to data.
5. Scan a test barcode in the application to check.

Sources: Basic Data Formatting (opens in a new window) · Keystroke Output (opens in a new window) – Zebra TechDocs – DataWedge (official documentation).

Short answer: If characters are entered incorrectly, the DataWedge documentation advises increasing the inter-character delay of the keystroke output in steps of 100 ms. Barcodes that contain control characters can also be sent as key events.

Likely cause

DataWedge's Keystroke output simulates keyboard input. Zebra states that some applications lose characters if the keystrokes are too fast, and that web applications listen to these keystrokes in their own way.

What to do

1. In the DataWedge profile, open Keystroke output.
2. Increase the inter-character delay in steps of 100 ms, then test. Zebra states that this setting may slow down the application.
3. For barcodes containing control characters, enable Send Control Characters as Events (ASCII codes 1 to 31); Send Characters as Events covers ASCII codes 32 to 126.
4. On Android 10 and later, it is normal for the keyboard to disappear briefly during scanning.

Source: Keystroke Output (opens in a new window) – Zebra TechDocs – DataWedge (official documentation).

Short answer: Check that your network transmits in a supported band: according to the data sheet, the MC3300x works with 802.11a/b/g/n/ac on 2.4 GHz and 5 GHz. Also check the mobile computer's Wi-Fi country, which determines the permitted channels.

Likely cause

The data sheet lists the supported standards and bands (2.4 GHz and 5 GHz, 2x2 MU-MIMO). Zebra's Wi-Fi Manager documentation states that the “AUTO” country setting relies on the 802.11d standard and that not all channels are available in all countries.

What to do

1. Check that the access point transmits on 2.4 GHz or 5 GHz, with an 802.11a/b/g/n/ac standard.
2. Check that Wi-Fi is enabled: according to Zebra, most Wi-Fi settings can only be changed when Wi-Fi is enabled.
3. Country: in “AUTO”, the mobile computer listens for an 802.11d country beacon. According to Zebra, countries whose infrastructure does not support 802.11d must be selected manually.
4. After a battery replacement, the connection is only maintained for about 30 seconds: see hot swap.

When to call a technician: the problem persists on a correctly configured network: according to Zebra, advanced Wi-Fi logging (Fusion), stored in the /fusionlogs folder, is generally used at the request of Zebra support.

Sources: WLAN (opens in a new window) – Product Spec Sheet – MC3300x Mobile Computer · Hot Swap Mode/Backup Power (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) · Wi-Fi Manager (opens in a new window) – Zebra TechDocs – MX (official documentation).

Short answer: By default, the USB connection is only used for charging (“No data transfer”). Open the notification panel, tap “Charging this device via USB” and choose “File Transfer” for files or “PTP” for photos.

Likely cause

“USB Communication” section of the reference guide: the default USB option is No data transfer.

What to do

1. Connect the mobile computer to the computer with a USB accessory (cradle or cable).
2. Pull down the notification panel and tap Charging this device via USB.
3. Choose File Transfer to copy files, or PTP for photos.
4. Before disconnecting, eject the mobile computer on the computer, then remove it from the USB accessory.

Sources: USB Communication (opens in a new window) · Transferring Files (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) (official documentation).

Short answer: If the light stays off, Zebra cites an incorrectly inserted battery or a cradle (or cable) that is not powered. Check the power supply, reinsert the battery and charge between 0 °C and 40 °C.

Likely cause

In the charging light table in the reference guide, “Off” means that the battery is not charging, that it is not correctly inserted in the cradle or that it is not connected to a power source.

Caution: Zebra says to follow the battery safety guidelines in the MC3300x product reference guide and to charge batteries only between 0 °C and 40 °C.

What to do

1. Check that the cradle or charging cable is properly powered.
2. Remove the mobile computer and put it back in the cradle.
3. Check the battery: it must be pushed in until both release buttons return to their original position.
4. Charge in a room between 0 °C and 40 °C.
5. While charging, the light is solid orange, then solid green once charging is complete. At room temperature, Zebra states less than 5.2 h to reach 90% with the 7,000 mAh battery, less than 3.8 h with the 5,200 mAh one and less than 2.2 h with the 2,740 mAh one.
6. If the light flashes red, see charging error.

When to call a technician: the mobile computer does not charge in any cradle or on any cable: the quick start guide refers you to your site's technical or IT support.

Sources: Charging the Battery (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) · Charging Indicators (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) · Charging the Device (opens in a new window) – MC3300x Mobile Computer Quick Start Guide (MN-003567-01EN Rev. A) (official documentation).

Short answer: According to Zebra, a solid red light indicates a battery that has reached the end of its useful life, whether it is charging or already charged. Confirm in the Battery Manager app: the value “Decommission” means that it needs replacing.

Likely cause

The quick start guide associates solid red with a battery at the end of its useful life. In Battery Manager, the reference guide states that “Decommission” indicates a battery that has exceeded its useful life and must be replaced.

Caution: Zebra reminds you to follow the battery safety guidelines in the MC3300x product reference guide.

What to do

1. Swipe up on the home screen and open the Battery Manager app.
2. In the information tab, read the Health field: Good indicates a healthy battery, Decommission a battery that needs replacing. The other possible values are Charge error, Over Current, Dead, Over Voltage, Below Temperature, Failure Detected and Unknown.
3. Look at the Wear gauge: it turns red when wear exceeds 80%.
4. Replace the battery with a compatible model (see compatible batteries).

When to call a technician: the Battery Manager app shows Decommission: the Zebra guide refers you to the system administrator to replace the battery.

Sources: Charging/notification lights (opens in a new window) – MC3300x mobile computer quick start guide (MN-003567-01FR Rev. A) · Spare Battery LED (opens in a new window) – MC3300x Mobile Computer Quick Start Guide (MN-003567-01EN Rev. A) · Battery Manager Information Tab (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) (official documentation).

Short answer: The mobile computer is in hot swap mode: according to Zebra, flashing orange indicates that the wireless connection is maintained for about 30 seconds. Insert a charged battery within five minutes to retain the data in RAM.

Likely cause

“Hot Swap Mode/Backup Power” section of the reference guide: when the battery is removed, the screen goes off, wireless connections are maintained for about 30 seconds (flashing orange light), then the mobile computer goes into critical suspend and retains RAM for about five minutes.

What to do

1. Press the battery's two release buttons and remove it.
2. Insert the replacement battery and press firmly until both release buttons return to their original position.
3. Do this within five minutes: after that, the data in RAM is no longer retained.
4. The mobile computer resumes automatically. Only press the Power button if it was switched off or has been without a battery for a long time.

Zebra states that hot swap only retains data if the backup supercapacitor is fully charged, which can take up to 10 minutes. The French quick start guide mentions the MC3300x-R/S for maintaining the wireless connection for 30 seconds.

Sources: Hot Swap Mode/Backup Power (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) · Replacing the Battery in the MC3300x-R/S (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) · Replacing the battery (opens in a new window) – MC3300x mobile computer quick start guide (MN-003567-01FR Rev. A) (official documentation).

Short answer: Zebra recommends identifying the apps that use the most power in the battery settings, then disabling them or forcing them to stop. Also check battery wear in Battery Manager: above 80%, the gauge turns red.

Likely cause

The reference guide links battery life to app power consumption (“Monitoring Battery Usage” section) and to battery wear, shown by Battery Manager.

What to do

1. Open Settings > Battery to see overall consumption.
2. For an app: Settings > Apps & notifications, choose the app, then Advanced > Battery. Use DISABLE or FORCE CLOSE for those that use too much power.
3. The screen sleep delay is set in Settings > Display > Screen timeout (from 15 seconds to 30 minutes, or never).
4. In Battery Manager, a red Wear gauge indicates a battery that is more than 80% worn: plan to replace it.

Sources: Monitoring Battery Usage (opens in a new window) · Setting Screen Timeout (opens in a new window) · Battery Manager Information Tab (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) (official documentation).

Short answer: According to Zebra, the mobile computer shuts down when the battery reaches the critical level of 6%. If only the screen goes off, the mobile computer is simply in suspend mode: press the Power button to wake it.

Likely cause

The reference guide states that the mobile computer switches off when the main battery reaches 6% and that it goes into suspend mode after the period of inactivity set in the display settings.

What to do

1. Put the mobile computer on charge: below 6%, it cannot stay on.
2. If the screen is only black, press the Power button, then swipe up on the screen to unlock it.
3. By default, the Power button and the trigger (MC3300x-G) or the centre scan button (MC3300x-R/S) wake the mobile computer. Other buttons can be added in Settings > Wake-Up Sources (GUN_TRIGGER, LEFT_TRIGGER_1, RIGHT_TRIGGER_1, SCAN).
4. If necessary, lengthen the sleep delay: Settings > Display > Screen timeout.

Sources: Charging the Battery (opens in a new window) · Waking the Device (opens in a new window) · Setting Wake-Up Sources (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) (official documentation).

Short answer: Start with a restart: press and hold the Power button and choose “Restart”, which Zebra provides for when the software stops responding. If the problem persists, Enterprise Reset and then Factory Reset reset the mobile computer, but erase data.

Likely cause

Zebra distinguishes four levels: restart (soft reset), hard reset, Enterprise Reset and Factory Reset. According to Zebra's MX documentation, a restart keeps settings, apps and their data; Enterprise Reset erases data like a Factory Reset but preserves the /enterprise partition; Factory Reset erases the /data, /cache and /enterprise partitions.

Caution: Enterprise Reset and Factory Reset erase the user's data and apps; Factory Reset also erases the /enterprise partition, which contains the company configuration. According to Zebra, a removable storage card is not erased by a Factory Reset, unlike a “Full Device Wipe”. Before sending the device for repair, Zebra says to remove the microSD card.

What to do, in order

1. Restart: press and hold the Power button, then tap Restart. According to Zebra, only volatile data (app state, temporary data) is lost.
2. Enterprise Reset: the reference guide offers it from the mobile computer's settings, via microSD card or via ADB; for the last two methods, Zebra provides an Enterprise Reset package to download. The mobile computer restarts in Recovery mode and keeps the company configuration (/enterprise).
3. Factory Reset: via microSD card or ADB, with the Factory Reset package provided by Zebra. The mobile computer restarts in Recovery mode and returns to its factory state, without the company configuration.

When to call a technician: the mobile computer remains frozen despite these resets: the reference guide refers you to Zebra support, with the mobile computer's serial number, model and software version.

Sources: On/Off button (opens in a new window) – MC3300x mobile computer quick start guide (MN-003567-01FR Rev. A) · Power Key Menu (opens in a new window) – MC3300x Mobile Computer Quick Start Guide (MN-003567-01EN Rev. A) · Enterprise Reset (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) · Performing a Factory Reset (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) · Service Information (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) · Power Manager (opens in a new window) – Zebra TechDocs – MX (official documentation).

Short answer: First check that the battery is properly locked in and charged, then press and hold the Power button until the Zebra splash screen appears. If the mobile computer starts but stays frozen, move on to a reset.

Likely cause

The quick start guide says to install the battery until both release buttons return to position, then press and hold the Power button until the Zebra splash screen appears. The reference guide states that the mobile computer switches off when the battery reaches 6%.

What to do

1. Remove the battery and reinstall it: on the MC3300x-G, loosen the hand strap, align the battery, slide the front into the compartment and press firmly until both release buttons return to position, then retighten the hand strap.
2. Press and hold the Power button until the Zebra splash screen appears.
3. If there is no response, place the mobile computer in its cradle: a solid orange light confirms that the battery is charging.
4. Try a charged, compatible battery (MC32N0 batteries are not compatible).
5. If the mobile computer starts but stops responding, see reset the MC3300x.

Sources: Installing the Battery (opens in a new window) – MC3300x Mobile Computer Quick Start Guide (MN-003567-01EN Rev. A) · Charging the Device (opens in a new window) – MC3300x Mobile Computer Quick Start Guide (MN-003567-01EN Rev. A) · Charging the Battery (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) (official documentation).

Short answer: According to the Zebra data sheet, the MC3300x can be upgraded to Android 14 and receives security patches through the LifeGuard programme. First note the installed version in “About phone”, then apply the Zebra update package via microSD card or ADB.

Likely cause

The data sheet presents the MC3300x as upgradeable to Android 14, with LifeGuard for Android security updates. The reference guide (Android 11) provides two ways of installing a system update: microSD card and ADB. According to Zebra's MX documentation, the update replaces or patches the operating system from a Zip file and restarts the mobile computer in Recovery mode.

What to do

1. Note the installed version: open the settings (Quick Access panel, two-finger swipe down from the status bar), tap About phone and read Build number and Android security update.
2. Obtain the Zebra system update package for your mobile computer.
3. Install it via microSD card or ADB: the mobile computer restarts in Recovery mode during the operation.
4. After the restart, check Build number in About phone again.

According to Zebra's MX documentation (Power Manager), from Android 8 onwards the operating system update action can only be used to upgrade.

Sources: Performing a System Update (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) · Determining Software Versions (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) · Operating System (opens in a new window) – Product Spec Sheet – MC3300x Mobile Computer · Power Manager (opens in a new window) – Zebra TechDocs – MX (official documentation).

Short answer: The button may have been remapped in Key Programmer, which Zebra advises against for the scan button. If the mobile computer is in suspend mode, only certain buttons wake it: by default, Power and the trigger (MC3300x-G) or the centre scan button (MC3300x-R/S).

Likely cause

The reference guide allows buttons to be remapped (Key Programmer) while stating that remapping the scan button is not recommended. It also defines the buttons that wake the mobile computer.

What to do

1. Open Settings > Key Programmer and check the assignment of the SCAN, GRIP_TRIGGER, LEFT_TRIGGER_1 and RIGHT_TRIGGER_1 buttons.
2. If the mobile computer is in suspend mode, wake it with the Power button; the other wake-up buttons are set in Settings > Wake-Up Sources.
3. Reminder: the Power button and the Back, Home and Recent apps buttons cannot be remapped.
4. If the button does trigger the beam but nothing is read, see the mobile computer no longer reads.

Sources: Remapping a Button (opens in a new window) · Remappable Keys (opens in a new window) · Setting Wake-Up Sources (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) (official documentation).

Short answer: The MC3300x offers two touch modes: “Stylus and Finger” and “Glove and Finger”. Choose the mode that suits your use in the display settings.

Likely cause

“Touch Panel Mode” section of the reference guide: the touch mode is set according to whether a stylus or gloves are used.

What to do

1. Open Settings > Display > Advanced > TouchPanelUI.
2. Choose Glove and Finger (Screen Protector OFF) for use with gloves, or Stylus and Finger (Screen Protector OFF) for a stylus.
3. Test a few touches with the operator's usual equipment.

Source: Touch Panel Mode (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) (official documentation).

Short answer: According to the Zebra reference guide, the MC3300x does not support haptic feedback: it does not vibrate. Alerts are given by sound, which can be adjusted in the “Sound” settings.

Likely cause

“General Sound Setting” section of the reference guide: the mobile computer has no haptic feedback.

What to do

1. Open Settings > Sound and adjust Media volume, Alarm volume and Notification volume.
2. Check that Do Not Disturb mode is not active.
3. In Other sounds and vibrations, enable the screen locking, charging and touch sounds if required.
4. The good read beep sounds by default for each decoded barcode.

Sources: General Sound Setting (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) · Scanning with the Internal Imager (opens in a new window) – MC3300x Mobile Computer Quick Start Guide (MN-003567-01EN Rev. A) (official documentation).

Short answer: According to the Android 11 reference guide, Enterprise Keyboard is not preinstalled on the MC3300x: you need to request it from Zebra support. Once installed, it is enabled in the virtual keyboard management settings.

Likely cause

The reference guide states that Enterprise Keyboard is not preinstalled and that Enterprise Keyboard and the virtual keyboard are disabled by default. The mobile computer has the Android keyboard (AOSP version) or Gboard (GMS version).

What to do

1. Enable the keyboard: Settings > System > Languages & input > Virtual keyboard > Manage keyboards, then tap the keyboard you want.
2. To switch keyboards from Gboard or the Android keyboard, press and hold the comma key.
3. Enterprise Keyboard has a numeric tab (123), an alphabetic tab, a special characters tab (#*/) and a scan tab (Scan).

When to call a technician: Enterprise Keyboard is not installed: the reference guide refers you to Zebra support to obtain it.

Sources: Keyboard Configuration (opens in a new window) · Using the Enterprise Keyboard (opens in a new window) – MC3300x Mobile Computer Product Reference Guide for Android 11 (MN-004219-01EN Rev A) (official documentation).

Short answer: According to Zebra, RFID reading must first be enabled in an RFID reading application; the trigger or the application's “Read” command then starts the inventory. Hold the mobile computer horizontally or vertically depending on the orientation of the tag.

Likely cause

The MC3330xR quick reference guide describes reading in four steps: enable reading in an RFID application, point the mobile computer, press the trigger (or “Read”), release it (or “Stop Read”). The data sheet gives a nominal range of 12 m and a band of 865 to 928 MHz.

Caution: The quick reference guide says to use the device only as instructed and advises against third-party accessories, which may not ensure compliance with radio frequency exposure requirements; under Canadian regulations, it says to keep the front of the RFID antenna at least 55 mm from any person. Battery: do not short-circuit it and do not replace it with an incorrect type (risk of explosion).

What to do

1. Open an RFID reading application and enable tag reading.
2. Point the mobile computer at the tag, horizontally or vertically depending on the orientation of the tag.
3. Press the trigger or tap Read in the application to inventory all the tags; release it or tap Stop Read to stop.
4. Move closer: according to the guide, the distance between the tag and the antenna corresponds to the approximate read range (nominal range of 12 m according to the data sheet).
5. Check that the tags are UHF EPC Gen2 tags compatible with the 865 to 928 MHz band specified by Zebra.

The data sheet presents the MC3330xR as the successor to the MC3300R family and states that the same RFID SDK is used for the MC3330xR, MC3390xR, MC3330R and MC3390R.

Sources: Reading RFID Tags (opens in a new window) – MC3330xR Integrated UHF RFID Hand-held Reader Quick Reference Guide for Android 10 (MN-003890-03EN-P Rev. A) · RFID (opens in a new window) – Product Spec Sheet – MC3330xR UHF RFID Reader (official documentation).