Owners of Xiaomi, Redmi and POCO smartphones periodically face an intrusive notification informing them that an error has occurred in the com.android.phone application, which is a system process responsible for the operation of telephony, and its failure can lead to the inability to make calls, send SMS or even use the mobile Internet. Usually the message appears immediately after you load the MIUI or HyperOS operating system, blocking the normal operation of the device.
This problem should not be ignored, as it may indicate deeper conflicts in the software or malfunctioning. SIM-System failure often occurs after a failed firmware update, incompatible applications or physical damage to SIM card contacts. In some cases, the phone may simply restart in a loop or constantly show a window with a "Close" or "OK" button".
In this detailed guide, we’ll take a look at all the current methods of solving a problem, from simple actions with a SIM card to using an engineering menu. It’s important to understand that the sequence of steps matters: you should always start with the least risky methods to avoid losing personal data. Below are proven ways that help in most cases on Xiaomi brand devices.
Primary diagnosis and work with SIM-card
The most common reason why the com.android.phone process fails is physical contact with the communication module. The smartphone cannot read the operator's data correctly, which causes an endless cycle of attempts to register in the network and the subsequent crash of the service.
Remove the SIM card tray and carefully inspect the metal contact on the card itself. If it has contaminants, oxides or scratches, it may disrupt the connection. Gently wipe the chip with dry soft cloth or eraser. Also check the tray itself: it should sit tightly in the case, not stagger and not have visible damage. If you have two SIM cards, try leaving only one, changing the slots to identify the problem connector.
In situations where an error appears after the SIM card is removed, the problem may lie in the network settings. Try to put the phone into flight mode for 10-15 seconds, and then turn it off. This will force the radio module to restart. If the com.android.phone persists error (saves), move to software methods for cleaning the cache.
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Use a stationery eraser for careful cleaning of contacts SIM-maps – this removes oxides better than dry cloth, but do it carefully so as not to damage the chip.
It’s worth noting that the old SIM cards you’ve been using on different phones for years can be physically worn out, so even if the cleanup has helped temporarily, the best solution is to replace your carrier’s card with a new one with 4G/5G support.
Cleaning up the data and cache of the system application
If physical manipulations fail, you need to clear up the accumulated temporary files that may have been corrupted. In the MIUI shell, access to this data is hidden in the application menu, but it's quite easy to find it. This method is safe and does not delete your personal contacts or photos, it only resets the settings of the telephony module itself.
To perform the procedure, go to Settings, then select App and then All Apps. In the list, find Phone Services or Phone (green handset icon). Click on it, select Storage, and successively click on Clear Cache and Clear All (or Reset Settings).
Once the data is cleared, the phone may request reconfiguration of the preferred network type or permission to access contacts. This is normal behavior. Rebooting the device after this procedure is mandatory for the changes to take effect. Often, it is resetting the application settings that resolves the version conflict after the system update.
☑️ Checklist of cleaning the phone service
In some versions of MIUI firmware, a process may be called com.android.phone directly in the list of all processes if developer mode or system services are enabled. If you can't find Phone Services, try searching for settings to type in the word "SIM" or "Phone" to quickly navigate to the desired menu.
Resetting network settings to factory values
When cleaning the cache of a particular application doesn’t help, the problem may be global settings on the operating system’s network stack. Resetting the network settings returns Wi-Fi, Bluetooth, and mobile settings to out of the box, especially if you’ve recently changed carriers or reflashed your phone.
To reset, open Settings, go to About Phone or Connect and Sharing (depending on the version of MIUI). Find Reset Wi-Fi, Mobile and Bluetooth or simply Reset. Choose Reset Network settings instead of a full reset of the entire phone.
This procedure eliminates APN configuration errors (access points), which are often the reason why com.android.phone crashes when trying to transfer data. Once reset, the phone will reboot and you will need to re-enter passwords from home Wi-Fi networks.
⚠️ Note: Resetting network settings will remove all stored Wi-Fi passwords and Bluetooth paired devices.Make sure you remember passwords from important networks before performing this operation.
Checking updates and rolling back firmware
The unstable operation of telephony is often the result of bugs in the version of the operating system itself. Xiaomi developers regularly release security patches and bug fixes. If you have a beta version of MIUI or an old build installed, the likelihood of process conflicts is much higher.
Check for updates in Settings → About Phone → MIUI. If an update is available, install it. However, if the error appears after the last update, the situation is reversed: the new firmware may contain critical errors, in which case users often have to roll back to the previous stable version through the computer and the Mi Flash utility, or wait for the next patch.
Also worth checking for updates to system components through the Google Play Store. Go to the app store, click on the profile avatar and select "Applications and Device Management." Update all system services, especially Google Play Services and Android System Intelligence. Sometimes version conflicts between Android system libraries and the shell cause crashes.
For advanced users, you can manually install updates, download the current firmware from the official website and start the installation through the update file selection menu (three dots in the corner of the update screen), which allows you to bypass the update order and immediately install the corrected version of the software.
What is Fastboot and what is the phone error?
Use of engineering menu and reset preferences
Android diagnostics has a hidden engineering menu that allows you to test communication modules. On Xiaomi devices, entry can be limited, but it is worth trying. Enter the phone application (set) code # #4636##. If the menu opens, select Phone Information.
You can see the status of the SIM card and the type of network in this menu. Try switching "Preferred Network Type" to LTE Only or 3G Only, and then back to NR/LTE/GSM. This action will force the device to re-register on the operator's network. If the code doesn't work (MIUI often blocks login), you can try using the Activity Launcher app from Play Market to find and run the hidden Testing activity.
Another effective method is to reset application preferences. This doesn't delete data, but resets all default permissions and settings for all programs. Go to Settings → Applications → menu (three dots) → Reset application settings. This can eliminate the access rights conflict that interferes with system telephony.
| Method of decision | Difficulty | Risk of data loss | Efficiency |
|---|---|---|---|
| Rebooting the SIM card | Low. | No. | Medium |
| Cleaning up the service's cache | Low. | No. | Tall. |
| Resetting network settings | Medium | Wi-Fi passwords | Tall. |
| Full reset (Hard Reset) | Tall. | All data. | Maximum |
Radical measures: Hard Reset and access to the service
If none of the software methods worked, and the com.android.phone error keeps appearing, it may be that system files are damaged that cannot be restored without a complete system reinstallation. In this case, a Hard Reset is performed. This action will completely delete all your photos, contacts and applications, so be sure to back up your data to the cloud or to your computer.
To perform the reset, go to Settings → About Phone → Settings Reset → Erase all data. The phone will reboot and start the cleanup process, which can take 10-15 minutes. Once turned on, the device will be like new. If the error remains even on pure Android without installed third-party programs, the problem is likely hardware.
Hardware malfunctions such as modem failure, antenna plume damage or chip dumping after a fall require specialist intervention. If the phone is warranty, do not open it yourself. Contact Xiaomi's authorized service center for diagnosis.
⚠️ Warning: If the phone falls or falls into the water, software methods may not help, and in such cases, a telephone error often indicates physical damage to the motherboard.
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Hard Reset eliminates 95% of the software errors associated with system file conflicts, but requires a mandatory data backup.