The situation when a smartphone suddenly loses its internet connection is familiar to many device owners. XiaomiUsers often encounter problems with the Wi-Fi icon disappearing, an exclamation mark appearing, or the device displaying "Obtaining IP address" forever. This isn't just an annoying bug, but a complex issue rooted in the aggressive optimization of MIUI or HyperOS.
Unlike stock Android, firmware from Chinese manufacturers has specific power management algorithms that can forcefully disconnect connections to save battery life. Understanding how it works background service system, will allow you to independently diagnose and fix most problems without visiting a service center.
In this article, we'll take a detailed look at the software and hardware causes of wireless module instability. We'll explore hidden settings that are often ignored but affect signal stability, and offer proven methods for restoring the connection.
Aggressive power saving and MIUI optimization
The main reason why Xiaomi Redmi or POCO Wi-Fi is disabled, which is a built-in optimization system. The operating system tries to extend battery life by disabling communication modules if it deems their use unnecessary at the moment.
This is especially noticeable when the device's screen goes dark. The smartphone goes into sleep mode, and saving algorithm may completely disable the Wi-Fi module, even if background downloads or instant messaging apps are running. This behavior is built into the system core, but it can be adjusted.
⚠️ Note: After major MIUI or HyperOS updates, power saving settings may reset to factory defaults. Always check these settings again after updating the system.
To prevent this, you need to set up exceptions for specific applications. Go to Settings → Battery & PerformanceHere it is important to ensure that the "Unlimited" mode is selected for critical programs (for example, browsers or email clients).
It's also worth paying attention to the "Wi-Fi Assistant" feature. It's designed to switch to mobile internet if the wireless signal is weak. However, in practice, this mechanism often malfunctions, dropping a stable connection at the slightest fluctuation in signal strength.
IP address and DHCP configuration errors
A common problem is the error "Unable to obtain IP address." This means that the router and phone cannot agree on a unique identifier on the local network. In standard mode DHCP (Dynamic Host Configuration Protocol) the device requests the address automatically, but sometimes the router server does not respond in time.
A manual static IP configuration may be the solution. To do this, click the arrow next to your network name in the list of available Wi-Fi networks and select "IP Settings." Change the value from DHCP on Static.
You must enter the correct data in the fields that open. Typically, the router's IP address (gateway) is 192.168.1.1 or 192.168.0.1Your phone's address must differ in the last digit from the gateway address, for example, 192.168.1.128.
| Parameter | Value for DHCP (Auto) | Example for Static IP |
|---|---|---|
| IP address | Automatically | 192.168.1.128 |
| Gateway (Router) | Automatically | 192.168.1.1 |
| Network prefix length | 24 | 24 |
| DNS 1 | Automatically | 8.8.8.8 |
Using public DNS servers such as Google (8.8.8.8) or Cloudflare (1.1.1.1), often speeds up network response times and resolves issues with slow IP acquisition. This is especially important if your ISP provides unstable DNS.
Wi-Fi and Bluetooth module malfunctions
In smartphones Xiaomi Wi-Fi and Bluetooth modules often share the same antenna or operate in similar frequency bands (2.4 GHz). Conflict between these two technologies is a common cause of disconnects. If you have Bluetooth enabled and are actively transmitting data (via headphones or a watch), Wi-Fi speed may drop and the connection may be lost.
The 2.4 GHz band is heavily congested in apartment buildings. Neighbors' routers, microwave ovens, and baby monitors create "electromagnetic noise." Under these conditions, a phone may constantly search for a better access point or switch between frequencies, which appears to be constantly disconnecting.
It's recommended to switch to the 5 GHz band if your router and data plan allow it. This band is less crowded and offers faster speeds, although it has a shorter range to penetrate walls.
⚠️ Note: Not all models Xiaomi Support dual-band Wi-Fi. Check your model's specifications on the official website before searching for a 5 GHz network.
For diagnostics, you can use the engineering menu. In the dialing field, enter the command ##6484##In the CIT menu that opens, select WiFi or Bluetooth To perform hardware tests. If the test shows errors, the problem may be physical.
Problems with specific applications and background processes
Sometimes the phone itself isn't to blame, but a specific app that's not working properly with the network. For example, heavy games or streaming services can freeze the network stack if they don't have enough RAM.
MIUI is known for its strict memory management policy. It can forcibly close background processes, deeming them "heavy," which leads to the connection the app was using being terminated. This often happens with torrent clients or messaging apps.
To resolve the issue, find the problematic application in the list of installed programs. Go to Settings → Apps → All apps, select the desired one, and find the "Autostart" option. Make sure it's enabled.
- 🔋 Check the battery settings for a specific app and select "No Limits".
- 🔄 Clear the app's cache using the "Memory" menu in the program's properties.
- 📱 Make sure the app has all the necessary network permissions.
- 🛡️ Disable Privacy Protection for this app if it blocks access to your MAC address.
It's also worth checking if you have a third-party antivirus or memory cleaner installed on your phone. Such programs often conflict with the built-in security system. Xiaomi, causing chaotic connection breaks.
How to reset network settings without losing data?
Resetting network settings won't delete your photos, contacts, or apps. It will only reset Wi-Fi, Bluetooth, and mobile network settings to factory defaults. You'll need to re-enter your Wi-Fi passwords.
Reset network settings and update software
If software settings have been corrupted at a deep level, a complete reset of network settings will help. This will return all network interfaces to their original state. To do this, go to Settings → Connection and sharing → Reset Wi-Fi, mobile networks, and Bluetooth.
After the reset, the phone will reboot. This is an effective way to clear configuration errors that have accumulated over time. This often resolves the issue where the phone sees the network but won't connect.
Don't forget about system updates. Engineers Xiaomi They regularly release patches that fix wireless driver bugs. Go to Settings → About phone and check for updates.
☑️ Checklist before resetting network settings
It's important to note that after updating the firmware, the system may perform background app optimization for some time. During this period (usually 1-2 hours after the initial power-on), Wi-Fi performance may be unstable. Allow the phone to complete all processes.
Hardware failures and external factors
Once software solutions have been exhausted, it's worth considering hardware issues. Internal antennas in smartphones Xiaomi Located around the perimeter of the case or at the top. If the phone has been dropped or subjected to impact, the antenna cable may have become loose.
Overheating may also be a cause. Under prolonged load (navigation + Wi-Fi + bright sunlight), the processor and modem become hot. To prevent damage, the throttling system reduces performance and may disable power-hungry modules, including Wi-Fi.
Remove any protective case made of metal or containing metal components. These materials create a shielding effect, significantly weakening the signal. Plastic and silicone cases generally do not affect reception.
⚠️ Caution: If your phone has been dropped in water, even if it has IP68 protection, oxidation of the antenna contacts may appear over time. In this case, a service center will be required for diagnostics.
Test your Wi-Fi in different locations. If the network disconnects at home but works reliably at your friends' or office's, the problem is most likely with your router or its settings, not your phone.
Additional stability recommendations
Advanced users can change regional settings. Sometimes, changing the region in the phone settings (for example, from "Russia" to "India" or "Singapore") changes the radio module's operating algorithms, which can improve stability.
However, changing the region may affect the operation of some local services and frequency bands. Use this method with caution and only if other methods have failed. You can change the region back at any time.
It's also worth checking whether Airplane mode is enabled in the background due to a glitch. Sometimes, simply toggling this mode helps: turn it on for 10 seconds, then turn it off. This restarts all the device's radio modules.
Frequently Asked Questions (FAQ)
Why does Wi-Fi only turn off when the screen is off?
This is the power saving feature at work. The system assumes that if you're not looking at the screen, you don't need the internet. Go to battery settings and disable power saving for background apps or select "Unlimited" mode.
What should I do if my phone says "Saved" but there is no internet?
Try forgetting the network (deleting the connection profile) and reconnecting. Also, check the date and time on your device—an incorrect time can block a secure connection.
Does the case affect the Wi-Fi signal?
Yes, if the case contains metal inserts, magnets, or a very thick layer of material. Metal will shield the signal. Try removing the case and checking the stability of the connection.
How to reset network settings on Xiaomi?
Go to Settings → Connection and sharing → Reset Wi-Fi, mobile networks, and BluetoothPress the reset button and confirm. You'll need to re-enter your Wi-Fi passwords.