“Transmitter is off” on Xiaomi: reasons and 7 working ways of solving

Message “Transceiver off”** on Xiaomi smartphones (including Redmi, POCO Mi) occurs when the device loses communication with wireless networks - whether it is Wi-Fi, Bluetooth or mobile Internet. The error can occur after a firmware update, mechanical damage or failure of the communication module. In 80% of cases, the problem is solved software, but sometimes hardware intervention is required.

In this article, we will discuss all possible reasons for disconnecting the transceiver on Xiaomi, from the banal (for example, accidentally pressing a button in the settings) to the complex (damage to the antenna cable). ADB And there's a table of compatibility between different models, and if you read it, you'll know if you need to bring your phone to the service, or if you can do it yourself.

What does the error "Transmitter is off" mean?

The term transceiver refers to the chip that receives and transmits wireless signals. In Xiaomi smartphones, this can be:

• 📶 Wi-Fi/Bluetooth-module (e.g. Broadcom) BCM4356 qualcomm WCN3990)

When the system says the transceiver is off, it means one of three:

1. Software failure – the driver of the module “hangs” or is disabled at the OS level.
2. Hardware malfunction – chip, cable or contacts are damaged.
3. Blocking from the firmware side – for example, after a failed update or rooting.

In practice, the bug is most often Wi-Fi or Bluetooth, less often mobile, because wireless modules at Xiaomi are often combined into a single chip (e.g., Qualcomm). WCN3998 Redmi Note 10 Pro, and the failure of one component can “hang” the whole complex.

Reasons for disconnecting the transceiver on Xiaomi

To diagnose a problem accurately, you need to understand what preceded the error, and here is a table with the most common causes and their "symptoms":

If the error occurred for no apparent reason (there were no falls, updates or system interference), most likely, the fault in the driver, in this case, will help to reboot or reset network settings. If the problem occurred after physical impact (impact, moisture), will require a diagnosis in the service center.

⚠️ Note: On some models (for example, Redmi Note 8 Pro with Mediatek Helio chip) G90T) The "Transceiver is off" error may be due to overheating of the communication module. Check the temperature of the body in the upper part (near the camera) - if it is hot, let the phone cool before further action.

Method 1: Reboot and check physical switches

Start with the simplest one, forced reboot, which helps in 30 percent of cases where the error is caused by a temporary system failure.

Instructions:

1. Press the Power button for 10-15 seconds until the screen goes out and the phone vibrates.
2. Wait 30 seconds, then turn the device on again.
3. After downloading, check if the signal appeared Wi-Fi or mobile network.

If the reboot didn't help, check:

• 🔄 In the plane mode** – sometimes it is turned on accidentally (check down from the top edge of the screen by swipe).
• 📱 Physical network switch – on some models (e.g, POCO F1) There's a hardware switch-off button.
• 🔋 Battery charge – at levels below 5%, some modules are turned off to save energy.

Also try to turn on and off the “On the Plane” mode by hand:

1. Open the Settings. → SIM-maps and mobile networks.
2. Activate the switch "On the plane" mode, wait 10 seconds.
3. Turn off mode and check the link.

💡

If Wi-Fi turns on after restarting, but disappears again after a few minutes, try turning off the Adaptive Battery feature in the battery settings. It can force the communication module to be turned off to save charge.

Method 2: Reset network settings

If the transceiver is disabled due to a conflict of settings (for example, after connecting to a new access point or updating the firmware), resetting network settings will help, which will delete all stored Wi-Fi networks, passwords and Bluetooth settings, but will not affect personal data.

Instructions:

1. Go to Settings → System and device → Additional → Resetting.
2. Select Network Settings Reset (on some firmwares – Wi-Fi, mobile network, and Bluetooth Reset).
3. Confirm the action and wait for the reboot.

After discharge:

• 🔄 Connect to Wi-Fi again by entering a password.
• 📶 Check the mobile network if you SIM-The card is not determined, restart the phone again.
• 🔊 Turn on Bluetooth and try connecting your headphones or other device.

⚠️ Attention: On devices with MIUI 13/14 Google Play Services may be lost after a network reset. If apps stop updating, check the date and time settings (should be enabled automatically) and reinstall Google services through Settings → Annexes → Application management.

Method 3: Update the firmware and module drivers

The “Transceiver is off” error often appears after a failed update MIUI Or when you use custom firmware, it helps:

• 🔄 Retracement to the previous version MIUI (If the problem has occurred after the update).
• 📥 Manual installation of the last stable firmware through Recovery.
• 🔧 Flashing the communication module (only for experienced users).

The safest way to do this is to upgrade to the latest official version. MIUI:

1. Go to Settings → About the phone → System update.
2. Click Check Updates and install the available version.
3. If the update is not available, download the firmware for your model from en.miui.com and install it through System Update. → Three points. → Select a firmware file.

For models with unlocked loader (POCO F3, Redmi K40 etc.) you can try to flash the communication module separately through Fastboot:

fastboot flash modem NON-HLOS.bin


fastboot reboot

File. NON-HLOS.bin You can get it from the official firmware for your model.

Method 4: Checking hardware (antennas, cables, SIM-tray)

If the software methods didn't work, the problem could be physical damage to the communication components, and most commonly, the following are:

• 📡 Antenna cables are thin wires connecting the motherboard with antennas (located under the back cover).
• 🔌 Connectors SIM-cards – oxidation or contamination of contacts.
• 🛠️ Transceiver microcircuit - can move away from the board when falling.

How to check:

1. Visual examination SIM-Tray: Remove the tray and check if the contacts are corrosive or foreign objects. Clean the contacts with alcohol and a soft brush (do not use metal objects!).
2. Testing with another SIM-map: Insert the work card SIM from another carrier – if the network appears, the problem is in your card or operator account.
3. Test antennas (power users only!): Remove the back cover (heating with a hair dryer or using a suction cup). Check if the black/gold cables have moved away from the sockets on the board (usually signed) WIFI, MAIN, AUX).

If you are not sure about your skills, it is better to contact the service. The cost of diagnosing an antenna module in official Xiaomi centers starts from 500 rubles.

⚠️ Note: On Redmi Note models 8/9 Pro and POCO X3 NFC If you've recently changed your battery and then the network is gone, check the cables' connection to the motherboard.

Method 5: Use ADB plug-in

If the transceiver is disabled at the system level, but is physically healthy, you can try to force activate it through the system. ADB (Android Debug Bridge. This method works with 60% of devices with MIUI 12–14.

Instructions:

1. Install. ADB-computer-driver.
2. Turn on the phone Debugging over USB (Settings → About Phone → MIUI version – press 7 times, then go back to Additional → For Developers).
3. Connect your phone to your PC and execute the commands: adb shell su setprop sys.usb.config rndis,diag,adb If the phone is not rooted, skip the su command.
4. Reset the device.

To enable Wi-Fi through ADB:

adb shell am start -n com.android.settings/.wifi.WifiSettings


adb shell svc wifi enable

If the Bluetooth module is disabled:

adb shell service call bluetooth_manager 6

These commands don’t guarantee 100% results, but they often help when standard settings don’t work.

💡

After the teams ADB The module turns on, but after the restart it turns off again, the problem lies in the firmware, in which case only the flashing or rollback to the previous version will help. MIUI.

Method 6: Verification IMEI Recovery of baseband

If, together with the error "Transmitter is off", the mobile network disappears and the settings are not displayed IMEI, The problem may be related to:

• 🔢 Loss. IMEI (for example, after resetting or firmware).
• 📡 Damage to baseband (firmware of the communication module).
• 🔧 Incompatibility of firmware (if you installed custom software).

How to check for IMEI:

1. Dial on the phone keyboard *#06#.
2. If the number is Null or Unknown, IMEI lost.

Restore IMEI You can use the Engineer Mode (engineering menu):

1. Click ##4636## and select Phone Information.
2. Check status. IMEI — If it is empty, move on to recovery.
3. Download the Maui utility META or SN Write Tool (for Mediatek) or QCN Rebuilder (for Qualcomm).
4. Follow the instructions for your model (usually a root and original) IMEI box).

To restore baseband:

• Download the official firmware for your model.
• Extract the file. modem.img (or NON-HLOS.bin for Qualcomm).
• Fastboot: fastboot flash modem modem.img fastboot reboot

⚠️ Attention: Recovery IMEI on devices with Qualcomm Snapdragon (for example, POCO F3, Redmi K40) requires a file QCN, It's a device that you can only get from a working device of the same model. QCN-Files can block the network forever!

Method 7: Contact Xiaomi Service Center

If none of these methods worked, the problem is likely hardware, in which case it is recommended to contact the official Xiaomi service center or an authorized workshop.

• 🔧 Warranty repair (if the device is under warranty).
• 🛠️ Original spare parts (antennas, cables, communication modules).
• 📋 Diagnostics on professional equipment (for example, signal verification through the RF-analyzer).

The cost of repairing the transceiver in informal workshops:

Before the service visit:

• 📋 Write it down. IMEI (from the box or via *#06# if it is displayed).
• 🔄 Backup your data (if the phone is turned on).
• 📄 Take a check or warranty card (if the device is guaranteed).

Official Xiaomi service centers in Russia can be found on the website mi.com/ru/service.

Frequent Questions (FAQ)