“Some Features May Not Work” on Xiaomi: 7 Ways to Remove the Error and Get Back to Work

The message “Some features may not work” on Xiaomi smartphones, TVs or smart devices is one of the most common problems users face after updating their firmware, resetting settings or installing apps incorrectly. The error can manifest itself in various ways, from blocking access to the camera or NFC to completely failing system services like Google Play Services or Mi Account.

Most of the time, the problem is solved without going to the service center, but it is important to understand why, most often due to version conflicts, corrupted cache files or incorrect security settings. For example, after upgrading to MIUI 14, many Redmi Note 11 and Poco X4 Pro users complain of a mobile network or GPS failure, which is a typical symptom of “broken” configuration files.

In this article, we will discuss 7 proven ways to fix the bug, from the simplest (reboot) to radical (fastboot re-flashing).

1.Why does the error “Some functions may not work” appear?

A function malfunction report is not a specific error, but a generalized system warning of a failure of one or more components, and the reasons can be divided into 3 categories:

Programmatic conflicts are the most common cause, and they occur after:

• 📱 Updates MIUI "over the air" (OTA), especially if interrupted or updated with a version omission (e.g., from MIUI 12 immediately to MIUI 14).
• 🔄 Resets to factory settings without first cleaning data.
• 🛠️ Install custom firmware or modified versions of MIUI (e.g., MIUI EU or Xiaomi.eu).
• 🚫 Block system applications through Settings → Applications → Special Rights.

Hardware restrictions are less likely to cause, but they cannot be excluded:

• 🔋 Memory module malfunction (especially on budget models like Redmi 9A or Poco C31).
• 📡 Damage to the antenna module (if the mobile network or Wi-Fi is not working).
• 🔌 Connector problems USB-C (relevant for charging errors or OTG).

Security settings and regional restrictions:

• 🌍 Using firmware for another region (e.g., Chinese MIUI on a global device).
• 🔒 Google Mobile Services (GMS) blocked due to uncertified software.
• 📵 Operator restrictions (e.g., VoLTE blocking on some Redmis in Russia).

Critical feature: on devices with a MediaTek processor (for example, Redmi Note 10 or Poco M4 Pro), the error is often associated with damage to the modem partition, which is responsible for the mobile network and GPS. In this case, a conventional reset will not help - you will need to flash through the SP Flash Tool.

2. Quick ways to fix the error (without resetting)

Before you go through radical measures, try these methods, which work 80 percent of the time and don't require deleting data.

Restarting in Safe Mode

Safe mode disables all third-party applications, which helps to identify conflicting software:

1. Press the power button before the off menu appears.
2. Press and hold the “Switch Off” option (or “Reboot” on new versions of MIUI).
3. Confirm the transition to safe mode.

If the error disappears, one of the installed applications is to blame, delete the last installed programs or roll back their updates.

Cleaning the cache of system applications

A damaged cache can block functions, and clear it for key services:

1. Go to Settings → Applications → Application Management.
2. Search for: Google Play Services Google Play Mi Account Settings (yes, this is also an app!)

"Clear the cache."

Reset the device.

Resetting network settings

If you don’t have mobile internet, Wi-Fi or Bluetooth:

1. Open the Settings. → SIM-maps and mobile networks → Resetting network settings.
2. Confirm the action (password or fingerprint is not required).
3. After restarting, reset the network connection.

Update to Google Play Services

An outdated version of GMS often causes geolocation, push notifications, and authorization errors:

1. Open the Google Play Store.
2. In the search, type “Google Play Services”.
3. If you have an “Update” button, press it.
4. After the update, restart the device.

⚠️ Warning: If after clearing the Mi Account cache, the device requires a re-entry but does not accept the password, do not try to enter it more than 5 times.This can block the Xiaomi account for 24 hours. Instead, use recovery via SMS or backup mail.

3. Resetting: When and How to Do It Right

If quick methods don't work, the next step is to reset to factory settings, which will delete all the data, so first:

• 📱 Make a backup copy through Settings → Additionally. → Backup and reset.
• 🔐 Make sure to remember the data from Mi Account and Google (autonomy will be required after the reset).
• 📡 Connect your device to Wi-Fi — after a reset, your mobile network may not work.

How to reset your settings:

1. Go to Settings → About the phone → Reset settings.
2. Select “Erase all data”.
3. Enter your password (if installed) and confirm.
4. Wait until it is completed (it will take 5-15 minutes).

What to do after the discharge:

• 📱 Don't restore data from the backup right away! First check if the device is error-free.
• 🔄 Update all apps through Google Play Store.
• 📡 Set up your mobile network manually (sometimes the automatic setup gets lost).

⚠️ Warning: On some models (Redmi Note 8 Pro, Poco F1) after reset, IMEI may disappear. If the mobile network does not work even after manual settings, check IMEI through the code *#06#. If it is missing, you will need to restore it through Engineering Mode or firmware.

4. Flashing: A radical method for power users

If the reset doesn't work, you have to flash it back.

• 📱 Devices with a damaged system (cyclic reboot, boot errors).
• 🔧 Apparatuses after a failed update or custom firmware installation.
• 📡 Models with a "broken" modem (no network, GPS or Bluetooth).

Flashing methods:

Instructions for firmware via Fastboot (the most reliable way):

1. Download the official firmware for your model from the Xiaomi Firmware website (choose the Fastboot version).
2. Unpack the archive in a folder on a PC (for example, C:\miui_fastboot).
3. Install Xiaomi and ADB/Fastboot drivers (for example, via Mi Flash Tool).
4. Turn off the phone and press Volume Down + Power to log in to Fastboot.
5. Connect the device to the PC and run from the firmware folder file flash_all.bat.
6. Wait for the finish (10-20 minutes) and the device will restart automatically.

⚠️ Warning: Fastboot firmware deletes all data, including files in internal memory. If Mi Cloud Sync is enabled on the device, photos and contacts will be restored automatically upon logging in. However, SMS, call log and application settings will be lost irretrievably.

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Before you run your firmware, check the MIUI version on Xiaomi’s official website. If your current version is newer than the one offered, download the more recent firmware from the 4PDA or Xiaomi.eu forum, otherwise new errors may occur after the rollback.

5. Restoration of IMEI and mobile network

If the IMEI is lost or the mobile network is not working after reset or firmware, the problem lies in the damage of the modem or nvram files. This is a problem for devices on MediaTek (Redmi 9, Poco M3, Redmi Note 8T).

How to restore the IMEI:

1. Install the MTK Engineering Mode app (available on 4PDA).
2. Open it and go to MTK Settings → Connectivity → CDS Information → Radio Information.
3. Select Phone 1 (for the first SIM- card).
4. In the input field, type the command: AT +EGMR=1,7,"Your IMEI_1" (replace your IMEI_1 with the original IMEI, which is indicated on the box or under the battery).
5. Press Send AT Command.
6. Repeat for Phone 2 if you have two SIM- cards.
7. Reset the device.

If the IMEI is not restored or the team issues an error:

• 📱 Try flashing modem separately through the SP Flash Tool (files modem.img can be found on thematic forums).
• 🔧 Use the SN Write Tool (requires an authorization file for your model).
• 📡 Check if the SIM- card slot is damaged (mov the card or try another one).

Critical information: on devices with a Qualcomm Snapdragon processor (for example, Redmi K40 or Poco F3), recovery of IMEI is possible only through the QCN- file and the QPST program. Self-change of IMEI on such models can lead to complete network loss!

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If after all the manipulations, the mobile network does not work, the problem may be in the hardware (damaged modem or antenna), in which case a diagnosis is required at the service center.

6. Features for TVs and smart devices Xiaomi

The error “Some features may not work” occurs not only on smartphones, but also on:

• 📺 Mi TV TVs (especially after upgrading to MIUI TV 3.0).
• 💡 Smart lamps Yeelight or Mi LED Desk Lamp.
• 🔊 The Mi Smart Speaker columns.

For Xiaomi TVs:

Most often, they don't work:

How to fix it:

1. Reset your TV settings: Settings → Device → Reset and Update → Reset settings.
2. Update your firmware manually: Download the latest version from the official website. Unpack the ZIP- archive on a flash drive (FAT32 format). Insert the flash drive into your TV and select Settings → Update and Restore → Update via USB.
3. For DRM errors (no Netflix): Go to Settings → Apps → App Management → Netflix. Clear cache and data. Remove updates (Remove Updates button)

For smart lamps and speakers:

If the device does not respond to commands:

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If the Yeelight smart lamp flashes red after reset, this means a Wi-Fi connection error. Go to the router settings and turn off the MAC- address filtering or 802.11r (Fast Roaming) mode.

7. How to avoid recurrence of error

To prevent the problem from returning, follow these recommendations:

• 📱 Update your firmware gradually: don’t skip versions (for example, don’t update with your firmware). MIUI 12 straight on MIUI Better to install an intermediate version (MIUI 13).
• 🔒 Do not block system applications: even if they seem unnecessary (such as Mi Browser or Mi Video), disabling them can disrupt the system.
• 📡 Use stable firmware: Avoid beta versions of MIUI or custom builds (e.g. Xiaomi.eu) unless you are sure they are compatible.
• 🔋 Watch battery power: Do not update the firmware if the charge is below 50%. Interrupting the process due to discharge can lead to serious failures.
• 🛡️ Set up backup: save data regularly to Mi Cloud or PC via Mi PC Suite.

Checklist before updating the firmware:

⚠️ Warning: On devices with an unlocked bootloader, never install firmware for another region (e.g., Chinese MIUI on a global device), which will lead to Google Services blocking and network errors. To get back up, you will need to run the original firmware through Fastboot.

FAQ: Frequent questions by mistake "Some features may not work"