Why the access point on Xiaomi is turned off by itself: a full analysis + correction

Introduction: When a smartphone becomes an “unstable router”

You turn on the hotspot on Xiaomi, you plug in a laptop or tablet, and after 5-10 minutes, the Internet goes down. You have to go into the settings all the time and restart the handouts manually. I know this? From the budget Redmi Note 10 to the flagship Xiaomi 13 Ultra. the fault can be both hardware limitations and software “jambs” of firmware. MIUI.

In this article, we will not just list the possible causes, but analyze them taking into account the specifics of the Qualcomm and MediaTek modems in Xiaomi smartphones. You will learn how to distinguish between overheating of the chipset from a failure in the energy saving settings, why MIUI 14 strangles the access point in the background and what to do if the problem occurs after the update, and also proven solutions that work even on older models like the Redmi 5 Plus.

1. CPU overheating: when the smartphone "chokes" from the load

The most common cause of spontaneous shutdown of the access point is thermal trottling (automatic performance reduction when overheating), the modem and processor in Xiaomi smartphones are close, and with prolonged Wi-Fi distribution, the temperature can exceed 60-65°C. In this case, the system forcibly shuts down the communication module to prevent chipset damage.

How to understand that overheating is to blame:

• 🔥 The case of the smartphone is noticeably heated in the upper part (where the antenna is located).
• ⚡ The access point is turned off 5-15 minutes after activation, especially when data is actively transmitted (file download, video streaming).
• 📉 Settings menu → The phone. → The battery temperature exceeds 45°C.

Decisions:

• 🧊 Remove the case and place the smartphone on a flat surface (not on the sofa or blanket!).
• 🔄 Reduce the number of connected devices (optimally no more than 3-4).
• ⚙️ Enable Energy Saving mode in battery settings – this will reduce the load on the processor.
• 🛠️ For advanced: disable performance restriction through ADB (guideline).

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If the smartphone heats up even in plain, check the condition of the thermal paste. On models older than 3 years, it can dry out - in this case, a replacement at the service center will help.

How to turn off thermal trottling through ADB

⚠️ Warning: This method requires unlocking the bootloader and can cause overheating! use at your own risk.

adb shell settings put global thermal_engine_enabled 0

Once you have completed the command, restart your smartphone. To return your default settings, use:

adb shell settings delete global thermal_engine_enabled

Limitations MIUI: When the system saves your traffic

Firmware MIUI It's known for aggressively optimizing background activity:

• 🔌 Disable the access point when blocking the screen (even if in the settings it is forbidden).
• 📴 Limit data transfer speeds after 1-2 GB of traffic.
• ⏳ Automatically deactivate the distribution in 30 to 60 minutes without activity.

How to check and correct:

1. Open the Settings. → Access Point and modem → Access point settings.
2. Check the option to turn off inactivity - it should be turned off.
3. In the Energy Saving section → Battery Optimization Find the Settings app and select Without Limits.
4. For models on MIUI 13/14: Open the settings. → Special facilities → Improvements → Adaptive communication and disable this function.

Conflict with SIM-Card: When the operator "interferes" the distribution

If the access point is turned off after exactly 1-2 hours, the problem may be due to the tariff or operator settings. Some providers (for example, Tele2 or Iota) limit the Internet distribution time by default.

How to check:

• 📱 Put it in. SIM-card to another smartphone and try to enable access point.
• 💳 Check the tariff conditions on the operator's website (section "Modem mode" or "Access Point»).
• 📞 Call support and check if there are any time limits for distribution.

Decisions:

• 🔄 Reboot your smartphone in Flight Mode for 30 seconds, then turn it back on.
• 📲 Manually select the operator network (Settings) → SIM-map → Choice of network).
• 💰 Activate the option "Unlimited access point" (if available at the rate).

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If the problem occurs after the change SIM-Cards, try to return the old one – sometimes new cards require additional activation of the distribution service from the operator.

⚠️ Attention: At some rates, MTS and Beeline, the distribution of the Internet is blocked after 5 GB of traffic per month, even if the main Internet is unlimited!

4. Failures in firmware: when the software is to blame

If the access point is stable, but after the update MIUI It started to shut down, and it's the firmware bug:

• 📱 Redmi Note 11/12 post-update MIUI 14.
• 📱 Poco X3/X4 custom-made.
• 📱 Xiaomi 12T with a MediaTek Dimensity modem.

Signs of software failure:

• 🔄 The access point is disabled after a fixed period of time (for example, exactly 30 minutes).
• 📵 In system logs (Settings) → The phone. → Error log) has a record of WifiHotspotService failure.
• 🔧 Resetting network settings does not help.

How to fix it:

1. Reset network settings: Settings → SIM-map → Resetting network settings.
2. Clear the app's cache Settings: Settings → Annexes → Application management → Settings → Warehouse → Clear the cache.
3. Retracement to the previous version MIUI (If the problem occurs after the update).
4. Install an alternative firmware (e.g. Pixel Experience or LineageOS) for models with unlocked bootloader.

Check the version of MIUI in Settings → About the phone

Clear the app's cache Settings

Reset the network settings

Try to revert to the previous firmware (if available)-->

5. Hardware problems: when the "iron" is to blame

If none of these things worked, it could be a faulty Wi-Fi module or antenna, which is true for smartphones:

• 💥 Fallen from a height (especially at the angle where the antenna is located).
• 🌧️ Visited in water or humid environment.
• 🔧 Disassembled for repair (e.g. after battery replacement).

How to diagnose:

• 📶 Check the stability of regular Wi-Fi – if it also shuts down, the problem is in the module.
• 🔍 Check the antenna connector (requires disassembly) – often it departs after falling.
• 📡 Try connecting to another Wi-Fi network – if the speed is unstable, it’s the modem’s fault.

Decisions:

• 🛠️ Contact the service center for the module diagnostics Wi-Fi/Bluetooth (cost of repair - from 1 500 ₽).
• 🔧 If the smartphone is warranty, do not disassemble it yourself - this will void the warranty!
• 📱 Use the temporary solution USB-modem (if supported).

⚠️ Note: On Xiaomi models with Qualcomm Snapdragon module (for example, Redmi Note 10 Pro), antenna malfunction can only occur when you distribute Wi-Fi - the usual Internet via the Internet SIM-The card will work in a stable way, because the access point uses a separate communication channel.

6. Application conflict: when software from third-party developers is to blame

Some applications (especially) VPN-Clients, antiviruses and optimizers can block the access point:

• 🔒 Kaspersky, Avast, or 360 Security may consider the distribution as suspicious activity».
• 🌐 1.1.1.1 (Cloudflare) or AdGuard conflict with modem settings.
• 🔄 Greenify or AccuBattery aggressively optimize background processes.

How to find and resolve conflict:

1. Launch your smartphone in Safe Mode (click the power button) → Safe Mode: If the access point is stable, one of the installed applications is to blame.
2. Remove suspicious programs, starting with antiviruses and VPN.
3. Check the permissions of the applications in the Settings section → Annexes → Permits → Other permits → Changes in system settings.

List of problematic applications (according to user data) 4PDA):

7.Lack of RAM: When the system lacks resources

On Xiaomi budget models (e.g. Redmi) 9A POCO C31) The access point may be disabled due to a lack of RAM.The system forcibly closes background processes, including the Wi-Fi distribution module, to free up memory.

Signs:

• 📱 Access Point is disabled when you start "heavy" applications (games, video editors).
• 🔄 In Task Manager (Settings) → Annexes → Running) you can see that the settings are constantly restarted.
• 📉 Settings menu → The phone. → Free memory less than 500 MB of RAM.

Decisions:

• 🗑️ Close all background applications before enabling the access point.
• 🔧 Disable the system animation (section For developers) → The scale of window animation → Select Turn off animations).
• 📲 Use Lite mode in MIUI (Settings → Display. → Lite mode).
• 🔄 Reboot your smartphone once a day – it clears the RAM cache.

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On models with 2-3 GB of RAM (for example, Redmi) 8A) The access point will work stably only if no more than 2-3 light applications (messengers, browser) are running in the background).

FAQ: Frequent questions about the access point on Xiaomi