Xiaomi is losing the network: causes and ways to solve the problem

When a Xiaomi smartphone suddenly loses its network, it can be taken by surprise at the most inopportune moment. You try to make an important call, but instead of the beeps you see the words "No network" or "Only emergency calls." This is a common problem that affects both the budget models of Redmi and the flagship Mi and POCO. Most often the reason lies in the software failure or incorrect settings, not in the physical breakdown of the module.

Connection recovery requires a consistent approach, ranging from simple reboots to more complex configuration manipulations. Software failures often occur after updating firmware or installing third-party applications. Don't panic, as in most cases, the situation can be fixed on your own without contacting the service center.

Next, we'll go into detail about the algorithms for different signal loss scenarios, and you'll learn how to set up access points, check the physical state. SIM-And then you can use hidden engineering menus to diagnose it, and the critical first step is to test it. SIM-cards in another device to eliminate operator-side problems.

Basic diagnostics and reboot of modules

The first thing to do when a signal is lost is to avoid a temporary system failure. A MIUI or HyperOS operating system can accumulate errors in the radio module. A simple reboot of a device often helps to reset the cache of network services and re-register in the operator's network.

If a normal reboot didn't work, try switching the network modes manually. Go to settings and select Settings. → SIM-maps and mobile networks → Preferred type of network. Try to force the network to be exposed. 2G/3G, Wait for the signal to appear, then return the automatic selection, which causes the modem to re-search for available base stations.

Another effective method is flight mode. 10-15 This forcefully shuts down and re-initializes all the wireless modules in the smartphone, including GSM, Wi-Fi and Bluetooth, unlike rebooting, this method takes less time and does not close running applications.

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If the phone is in a thick case with metal elements, remove it. Metal can shield the antenna signal, especially in areas of uncertain reception.

Physical integrity check SIM-map

Often the problem is not the software, but the physical contact. SIM-The card might have oxidized, shifted in the tray, or got microcracks. Remove the tray with a special paper clip and carefully examine the chip. Golden contacts should not be contaminated or scratched.

It is recommended to gently wipe the chip with a soft dry cloth. SIM-A card that was cut with scissors from the Mini or Micro format to Nano may be incorrectly thick or chipped, in which case the carrier can replace the card for free or for a nominal fee, saving your number.

Also check the tray itself for SIM-Make sure it is not deformed and fits tightly to the body when installed. Even a microscopic gap can lead to loss of contact with antenna pins inside a smartphone, which is especially true for models with waterproofing.

• 📱 Visually inspect the chip for oxides and scratches.
• 🔄 Try to install it. SIM-The card is another slot (if there are two of them).
• 🧹 Wipe the contacts with a wipe or alcohol napkin.
• 📞 Check the card on another phone to avoid breakdowns.

Configure APN access points and network settings

Incorrect APN settings are one of the most common reasons why the Internet doesn't work even if the link indicator shows 4G or LTE. Operators periodically change the settings, and after updating the firmware, the old settings may stop working. You need to make sure that the settings are registered with the current data of your operator.

To access the settings go to Settings → SIM-maps and mobile networks → Choose yours. SIM → Access points (APN). If the list is empty or the settings are different from the standard ones, click Reset (usually an arrow icon or a three-dot menu) to return the operator's factory settings.

In some cases, manually creating a new hotspot helps. Click on "New hotspot" (or "+") and enter the data provided by the operator. It is important to correctly specify the type of APN: for normal mobile Internet, this is usually default,supl. After saving, remember to activate the new hotspot by selecting it with the radio button.

Resetting network settings to factory

If the APN manipulations fail, you should reset your network settings completely, which will bring your Wi-Fi, Bluetooth, and mobile internet settings back to factory values. Importantly, your personal files, contacts, and apps will stay in place, but you will have to re-enter your Wi-Fi passwords.

To perform the reset, go to Settings → Connection and sharing → Reset Wi-Fi, mobile networks and Bluetooth. It will alert you to the consequences. Confirm the action and wait for the modules to reboot. It often solves conflict problems. IP-addresses or erroneous configurations DNS.

⚠️ Note: After resetting your network settings, you will have to log in to all Wi-Fi hotspots again. Make sure you remember passwords from home and work networks before starting the procedure.

This method is particularly effective if the problem has occurred after switching from another operator or using the system. VPN-Reset clears any changes made to the network stack by the operating system.

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Network reset is a secure procedure that doesn’t delete your photos or contacts, but requires reconfiguring Wi-Fi and Bluetooth headsets.

Using the Engineering Menu for Diagnostics

For a deeper diagnosis, you can use Xiaomi's engineering menu, which is a hidden part of the system designed to test hardware. To get there, open the Phone app and type in the combination ##6484#. If the code doesn't work, your firmware may be restricting access and you'll need to install a special app from the store.

In the test menu, select the section associated with SIM-A map or network (often called a map or network) SIM Card Test or Telephony: You can check the signal level in dBm, the registration status in the network and the antenna. -50 before -80 dBm If the value is lower -110 dBm, the phone is in the “dead zone” zone».

You can also try switching your preferred network mode from the engineering menu, and find Preferred network type and try changing it from LTE/TD-SCDMA/UMTS to GSM only and then back to LTE preferred, which will force the device to re-register on the operator's network, ignoring cached data about previous connections.

• 🔍 Check the signal level in real time (dBm).
• 📶 Forced change network mode (2G/3G/4G).
• 🛠 Test the vibration and speaker (impacts communication indirectly).
• 📡 Check it out. IMEI-device code in the relevant section.

Problems after the update and rollback of the version

Users often experience network loss immediately after a MIUI or HyperOS update. The new firmware version may contain errors in modem drivers or mishandle frequencies in your region, in which cases the problem is massive and discussed on forums.

If the problem is after the update, try clearing the Settings and Google Play Services cache. Go to Settings → Apps → All Apps, find Settings, select Clear → Clear All. This won’t delete your settings, but resets the configuration cache.

⚠️ Warning: If the problem is massive and is related to a particular firmware version, waiting for a fix from developers is the safest solution.

In extreme cases, if the phone has stopped seeing the network completely (IMEI has become zero or null), damage to the EFS or Persist partition is possible. Recovering these partitions requires a backup (which rarely anyone does) and the use of specialized software such as QPST or MiFlash, which is only possible for experienced users.

When you need to contact the service

There are situations where software is useless, where if the phone falls, falls into the water or is subjected to severe mechanical stress, the antenna plume may have moved away or the modem itself is damaged, and in such cases, disassembly and diagnostics on the equipment are necessary.

Also, the reason for contacting the service is a situation when the phone does not see any of the SIM-The card is from different operators, and in another device they work properly, which indicates a malfunction of the power controller or network module on the motherboard.

Do not try to disassemble the phone yourself if it is on warranty. Opening the case will lead to loss of warranty obligations.

Frequently Asked Questions (FAQ)