Why the access point on Xiaomi is turned off: reasons and solutions

The situation where the Wi-Fi hotspot on a Xiaomi smartphone suddenly shuts down on its own is one of the most annoying problems for users: You connect a laptop or tablet to the Internet through your phone, and after a few minutes the connection simply breaks, leaving gadgets without a network. This happens not only on the budget models of Redmi, but also on the flagship devices of the Mi and Xiaomi 13/14 series.

The main reason lies in the aggressive optimization of the MIUI system or its new version of HyperOS. Energy saving algorithms often perceive the active distribution of the Internet as a background process that consumes too much charge, and forcibly terminate it. In addition, there are system restrictions on the number of connected devices and modem operation time, which the user often does not even know.

In this article, we will take a look at all the technical aspects that prevent the Internet from running smoothly, and provide step-by-step instructions for troubleshooting, how to set exceptions for system services, and why standard security settings can block the connection.

Aggressive battery optimization and energy saving

The most common reason why modem modems stop working is because of the built-in energy saving system. Xiaomi is famous for its rigid algorithms that kill background processes to prolong battery life. When you turn on Wi-Fi, the system after a certain period of time may find this process inactive or too expensive.

To fix this, you need to manually change your energy saving profile. The standard Balance or Energy Saving mode often blocks data transmission when your smartphone screen is off, you need to switch to Performance mode or set up a separate rule for the Internet distribution service, preventing the system from restricting its operation.

⚠️ Warning: Constant performance increases battery consumption and can cause the device to heat up during long Internet sessions.

It is also worth checking the optimization settings for specific applications, if you are using third-party programs to manage traffic or VPN-tunnels, the system can block their access to the network in the background, which leads to a break in the connection of the access point.

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Use No Limits mode only for network-related system services so you don’t land the battery in a couple of hours.

Wi-Fi frequency conflicts and 2.4 GHz bands vs. 5 GHz

Connection instability is often caused by the wrong choice of frequency range.Modern Xiaomi smartphones allow you to choose between the 2.4 GHz and 5 GHz bands. The 5 GHz range provides higher speeds, but has a shorter range and less penetration through obstacles.

If a connected device (such as an old laptop or budget tablet) doesn’t support 802.11ac or newer, it simply won’t be able to support a 5GHz connection. As a result, the access point may turn on, but the client device will permanently shut down or not see the network at all.

It's recommended to switch the access point to 2.4 GHz for maximum compatibility, which is slower, but much more stable, over distance and across walls, and you can do this in the advanced access point settings, where Bandwidth AP or "Frequency Range" needs to be changed manually.

System Limits and Number of Connections

The Android operating system, which runs the Xiaomi shell, has a limit on the number of customers connected at the same time. By default, the Xiaomi access point often allows only 1 or 2 devices to connect to you. If a third gadget tries to connect to you, the system can reset all previous customers or disable the access point itself.

You can check and change this limit in the hotspot settings, but it's worth remembering that the increase in the number of customers directly affects data speed and connection stability. The more devices hang on the phone, the higher the load on the processor and the Wi-Fi module, which leads to overheating and emergency shutdown.

There is also a hidden timeout of inactivity.If none of the connected devices transmit data for a certain time (usually 5 or 10 minutes), Xiaomi automatically turns off the access point to save resources.This feature can be turned off, but it is useful if you forget to turn off modem mode.

Failures in network settings and DNS

Sometimes the problem is not hardware, but software conflicts of network protocols. DNS-server IP-Addresses can cause devices to connect to an access point but not to the Internet, after which the connection is broken.

A common cause is accumulated errors in network configurations. Network resets return all parameters to factory values, removing stored Wi-Fi networks, Bluetooth pairs, and mobile hotspot settings. This often resolves the problem if the failure is caused by a software error after a firmware update.

To do the reset, go to the settings menu and find the connection and sharing section, which will need to confirm the action, after which the phone will restart the network modules, and remember to save passwords from important Wi-Fi networks in advance.

The Impact of Third-Party Apps and VPNs

Ad-blocking apps, antiviruses and especially VPN-Customers often conflict with the access point function. VPN On the phone, all traffic is redirected through the tunnel, but when you try to distribute this Internet over Wi-Fi, you can have routing conflicts.

Some of them VPN-The protocols do not support traffic flow for other devices by default, as a result, the access point works, but the connected devices do not see the Internet, and Xiaomi’s system may consider this as an error and turn off the module. Antiviruses can also block incoming connections from other devices, considering them suspicious.

It is recommended to temporarily disable all third-party network utilities for diagnosis, if the problem disappears, then it is the settings of the particular application, in some cases, you need to use special features "VPN Hotspot" inside the applications themselves to correctly distribute traffic.

⚠️ Note: When using free of charge VPN-Internet speed on connected devices can be critically low, which creates the illusion of a broken access point.

Hardware problems and overheating of the Wi-Fi module

The physical factor is also not excluded: the Wi-Fi module in a smartphone is a powerful source of heat. With the simultaneous operation of mobile Internet (4G/5G) and the creation of a Wi-Fi network, the load on the chipset increases many times, and if the phone body heats above a certain temperature, the thermal protection system activates.

Thermal throttling causes the processor and radio to lower frequencies or shut down completely to avoid damage to components, often when using the phone in a case that does not remove heat well, or when in direct sunlight.

In addition, damage to the antenna module after falls can lead to an unstable signal. If the access point is turned off only when the phone is in a certain position in space, this is a sure sign of a hardware problem with the antenna or plume.

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If the phone is hot to the touch at the time of Wi-Fi shutdown, let it cool down and remove the protective case - this will help to avoid the protection.

Table: Comparison of causes and methods of solution

For quick diagnosis, use the following table, which systematizes the main symptoms and ways to eliminate them.

FAQ: Frequently Asked Questions