Why Xiaomi doesn’t see why SIM-map: elimination of network errors

The situation when the Xiaomi smartphone stops seeing SIM-The screen can take you by surprise at the most inopportune moment, depriving you of connection and Internet access. The screen can show a crossed-out SIM icon, a status of "No Service" or endlessly search the network, ignoring the installed module. This is a common problem that often lies not in a hardware breakdown, but in a software failure or incorrect contact.

In most cases, you can restore the work yourself without going to the service center. You don't have to be an engineer to perform basic diagnostics. We'll take the algorithm from simple steps to complex, covering the software settings and physical features of the slot.

First of all, you need to understand the nature of the failure, which can be a temporary system glitch, a failure of the access point settings, or physical damage to contacts, and let's look at all the possible causes and ways to fix them, so you can quickly get your gadget back on track.

Primary diagnosis and physical condition check

The first thing to do when you find a problem is to do a visual inspection, and often the reason is trivial: the card is inserted on the wrong side or not, remove the tray and make sure that the chip is positioned correctly, according to the notch. If you use the Nano-SIM adapter to the Micro-SIM, check if the card is shifting inside it.

Take a closer look at the golden contacts on the SIM-They should be free of oxides, dirt or scratches, even a microscopic film of fat can break the connection, wipe the contacts with a soft cloth soaked in alcohol, or a regular eraser, and check the tray itself for deformation.

If Redmi or POCO doesn't see the SIM after cleaning and installing it properly, try installing the card on another phone, which is a critical step to avoid the failure of the communication module itself. If the card is working on another device, it's a problem in your smartphone. If not, contact the operator to change the SIM.

⚠️ Warning: Never insert or remove SIM-card with the phone on, if the device does not support Hot-Swap (although most modern Xiaomi models support.

Software methods of rebooting the communication module

Often, a MIUI or HyperOS operating system can freeze in the process of testing hardware. Simply restarting your phone may not be enough. Try a deeper method of resetting network settings. Go to the settings menu and find the connection section.

You need to find the item “Reset Wi-Fi, mobile networks and Bluetooth” This action will return all network settings to factory values by removing stored Wi-Fi passwords and access point settings, but often this solves the problem with registration on the network.

Another effective method is to switch the modes of the network. Go to the settings. SIM-maps and select the type of network. Try switching from 5G/LTE on 3G/2G, wait for the network icon to appear and then return back to Preferably LTE. This will force the modem to re-register in the operator’s network.

If the software methods didn't work, it's worth checking if the flight mode is activated. Sometimes the system can't leave this mode on its own. 10-15 So you turn it off for a second, and then you force it to turn off and turn on the radio.

Configure APN access points and network settings

One of the common reasons why a phone sees a SIM but the internet doesn't work or writes "No Network Access" is that APN hotspots are set up incorrectly. Operators change settings periodically, and old settings may conflict with new requirements.

To fix this, go to the Settings path. → SIM-maps and mobile networks → Choose. SIM-map → Access points (APN). In the menu that opens, click Reset (usually at the bottom of the screen or in the three-dot menu) and this will return your operator's standard settings.

If automatic reset didn't work, create a new hotspot manually, and the data to fill in (name, APN, login, password) can be found on your carrier's official website, and enter the data carefully, without unnecessary spaces.

Once you have entered all the data, be sure to save the profile and select it by ticking the radio button. Reboot the device to apply the changes. Often, it is the correct APN that allows the phone to "friend" the network of the operator.

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If you use a dual-sim phone, make sure that the data transfer settings are the one that is selected. SIM-The card you're setting up the Internet for, and sometimes the phone tries to pump traffic from the card it ran out on.

Android Version Conflicts and MIUI Updates

Problems with definition SIM-The cards may appear after the firmware update. MIUI It may contain errors in the modem drivers, and check if there is an even more recent update that may contain a fix to this bug.

Sometimes it helps to clear the cache of system applications responsible for communication. Go to Settings → Apps → All apps. Find the Phone, Settings and Google Play Services app. For each of them, select Clear → Clear cache. Don't confuse it with Clear all data, otherwise reset your personal settings.

If the problem occurs after installing custom firmware or obtaining Root rights, there is a high probability of damage to the system files of the radio module, in which case the only solution is to return to the stock firmware via Fastboot.

Note the release date of your Android version. If you're using a very old version of the system, some new SIM cards (such as those with updated encryption) may not be correctly identified.

Hardware malfunctions and diagnostics of the slot

If software methods are powerless, you should think about a physical breakdown. SIM-The cards in Xiaomi smartphones are a mechanical element that is subject to wear and tear. With frequent card replacement, the contacts inside the tray can straighten or oxidize.

Try to move the card carefully in the slot with the phone on (if the design allows it), if contact appears, then the problem is lost, in some cases, it helps to put a thin piece of paper under the card (not on the contacts!), to tighten it to the contacts.

⚠️ Warning: Be extremely careful with the pressure on the tray.Excessive force can damage the internal board or permanently break the reader contacts, which will require soldering at a service center.

It is also worth checking the motherboard for moisture. Even if the phone did not sink, high humidity could cause contacts to corrosion. Check the moisture indicators (if there are any in the slot) - if they are red, warranty repair may not be available.

In rare cases, the problem is in the antenna module, so if the phone fell, the antenna plume could move away, and to check this will require disassembling the device, which is recommended only if you have experience.

Specifics of working with eSIM and virtual cards

Xiaomi’s current flagships support eSIM technology. If your phone doesn’t see the virtual card, the problem may be the operator’s profile. QR-The code from the operator was scanned correctly and the profile was activated.

Sometimes the eSIM profile freezes. Try removing it from the profile list in the settings and adding it again by scanning it. QR-It's the same code again. QR-The code can often be used in a limited number of times.

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Virtual SIM-eSIMs depend on the stability of the Internet connection at the time of activation. Make sure that at this point the phone is connected to reliable Wi-Fi.

Also check if the eSIM is blocked by the operator. Some operators block virtual cards when changing devices or when suspicious activity occurs. Contact the operator's support for the profile status.

When it is necessary to contact the service center

There are a number of signs that indicate that self-repair is impossible: If the phone sees the SIM cards of any carrier other than one particular, and this card works on other phones, the problem may be frequency incompatibility (rarely) or damage to a particular sector of the card memory.

If the phone doesn’t see any of them. SIM-card, and other functions (Wi-Fi, Bluetooth) are working normally, there is a high probability of failure of the power controller or the modem on the board.

Contacting specialists is also necessary if you notice a bloating battery that can press on the internal components, or if the phone was subjected to a severe impact, in such cases, delay can lead to a complete failure of the device.

Frequently Asked Questions (FAQ)