Xiaomi and Redmi smartphones are often seen as multimedia hubs, but their basic communication function remains critical, and when messages stop being sent or arrive, they can be taken by surprise, especially when it comes to confirmation codes or important notifications from banks.
One of the frequent causes of failure in the standard application "Messages" is an incorrect or downed number of the SMS center (SMSC). This setting is automatically prescribed by the operator at the first installation. SIM-maps, but in rare cases, after a change of region or firmware failure, it must be checked or entered manually.
In this article, we will discuss in detail where exactly in the shell of MIUI and HyperOS the desired parameter is hidden, how to change it correctly through the engineering menu or system settings, and what to do if standard methods do not give a result.
Why do I need a message center number and when to check it?
A message center number is a special address in the format of a phone number that serves as a gateway between your device and the operator's network, and when you send an SMS, it does not fly directly to the destination, but first goes to this server, which is responsible for its further routing.
If your Xiaomi smartphone has the wrong code or the field is blank, the device will not be able to physically transmit text to the operator’s network, even if there is a confident cellular signal.
- 📉 Messages hang in the status of "Sending" and after a while come with a delivery error.
- 🔄 You recently changed carrier, but the phone has the old network settings.
- 🌍 You have returned from roaming and the automatic update of the network parameters was incorrect.
- 📱 After updating the system or flashing reset network configurations.
It is worth noting that on modern devices Redmi Note and flagship models Xiaomi this parameter is hidden deeper than on older Android smartphones, which often causes confusion among owners.
Check the number through the standard settings menu
The safest and easiest way to do the current SMSC number is to use the built-in Messages interface. In the MIUI shell, the path to these settings may vary slightly depending on the Android version, but the logic remains the same.
To start, open the standard app, which usually has a blue envelope icon. Click on the three dots in the top right corner of the screen and select Settings. Next, scroll down to the bottom and find the "Additional" or "Extended Settings" section.
And that's where, in the back of the menu, the item we want is hidden. SIM-card, the system will prompt you to choose which SIM card you want to check the parameters for.
☑️ Algorithm for checking SMS settings
In the window that opens, you will see the field “SMS Center Number” if it displays a number that starts with your carrier’s code (e.g. +79...), then the basic setting is present. However, even if the number is there, it may not be relevant for the current location.
⚠️ Note: Some global versions of the firmware MIUI In Europe or India, the manual change of the message center number can be hidden or blocked by the manufacturer, in which case the field will be gray and inaccessible for editing.
Using the Engineering Menu for Diagnostics
If the standard interface doesn't allow you to change the setting or you want to do a deep connection diagnostic, Xiaomi's engineering menu comes to the rescue. It's a hidden part of the system designed to test hardware and networks.
To enter the test menu, open the Phone app and enter a special character combination. Most Xiaomi and POCO devices use the code ##4636##. Once you enter the last digit, the menu should open automatically.
In the list that opens, select Phone Information. If there are two SIM cards, you will be prompted to choose SIM 1 or SIM 2. Scroll down to the section related to network settings or setting your preferred network type.
What if the code doesn't work?
Here, you can try resetting the radio module by switching the network type, for example, from LTE to 3G and back, which often forces the phone to re-query current parameters, including the message center number, from the nearest carrier tower.
Be careful when changing other parameters in the engineering menu. Accidental activation of test modes or change of frequencies can lead to temporary signal loss or unstable operation of the communication module.
Current SMS numbers of the main operators' centers
Knowing the correct number of your carrier’s message center is a key factor in successful manual setup. Big Three operators and virtual operators use different prefixes, and confusion is unacceptable.
The following table shows the current SMSC numbers for major Russian operators, which are currently relevant, but in the event of a global change in tariff policy, the operator reserves the right to change them.
| Operator. | SMS Center Number (SMSC) | Region of action |
|---|---|---|
| MTS | +79168990000 | Russia |
| MegaFon | +79262092090 | Moscow and MO |
| MegaFon | +79212092090 | St. Petersburg and LO |
| Beeline | +79037011111 | Russia |
| Tele2 | +79220000420 | Russia (variable) |
Please note that Tele2 may have a different number depending on the region where you register your SIM card, and if your carrier is not listed, it is best to check the current number on the official website or by calling the support team.
💡
Save your carrier's support number to contacts under the name "AAA Operator" so that it is always at the beginning of the phone book, which will speed up the search for help in emergency situations.
Manually changing parameters through hidden commands
In some cases, when the interface does not allow you to make edits, you can use special USSD-Input codes or commands that work at the Android level, however, direct entry of the number through the ADB-The team requires root rights or a connection to the computer, which is not always convenient.
An easier way is to use network settings update codes: type ##726## on your phone keyboard (if supported by your model), or try sending an empty message to the operator's service number, which sometimes triggers automatic reconfiguration.
If you have superuser rights (Root), you can change the center number through the file manager with access to system files.
/data/data/com.android.providers.telephony/databases/mmssms.dbDirect editing of the mmsms.db database without proper knowledge can cause the messaging application to fail completely, and it is critical to make a full backup of the database before any manipulation of system files.
⚠️ Attention: Editing system databases requires extreme caution. One wrong number in the hex editor can cause the phone to stop seeing the SIM card or to constantly go into the rebut.
Resetting network settings as a universal solution
If manually changing the number doesn't help, or you can't find the right item, the most effective method is to completely reset the network settings, which will return all the parameters of mobile Internet, Bluetooth and calls to the factory values received from the operator.
To perform this operation on Xiaomi, go to the Settings menu → Connection and Sharing (or Additional Features) → Reset Wi-Fi, Mobile Network Settings and Bluetooth. The system will alert you that saved Wi-Fi passwords will be deleted.
Once confirmed, the phone will restart the network modules, and during the boot process, the device will re-register on the network and automatically request the current settings, including the correct SMS center number.
💡
Network reset is a secure procedure that does not affect your personal data (photos, contacts, applications), removing only network configurations.
This method is especially effective after traveling abroad, when the phone has “remembered” the parameters of a foreign operator and does not want to switch to home settings.