Problems with sending text messages on the Xiaomi Redmi Note 8 Pro smartphone are often an unpleasant surprise, especially when you urgently need to contact someone or confirm the login to the banking application. In most cases, the user does not even suspect that the reason is not the lack of a network or balance, but in an incorrectly prescribed SMSC address (Short Message Service Center), which is the gateway through which all your messages enter the operator’s network, and without its correct configuration communication is impossible.
Changing the message center number is a technical procedure that requires care, but is easily accessible without going to the service center. On devices running the MIUI shell, which is installed on the Redmi Note 8 Pro, this process can be hidden from the eyes of the average user in the standard interface. Therefore, editing often requires the use of special codes or engineering menus, which allows you to access the hidden settings of the radio module.
In this article, we will discuss in detail all possible ways to correct the SMSC address on your device, you will learn how to find the current number for your operator, how to enter it through hidden Android menus and what to do if standard methods do not work. Properly configuring this option is guaranteed to restore the functionality of text communication, returning you to full control of your smartphone.
What is SMSC and why is it important for the Redmi Note 8 Pro?
SMSC is an acronym for short message center. Think of it as the post office for your SMS: when you send a message, it first goes to this center, which then routes it to the recipient. If the address of this "partition" in your Redmi Note 8 Pro settings is incorrect or outdated, the phone simply does not know where to send data, and the message remains in the "Send" status indefinitely.
For owners of Xiaomi it is important to understand that this parameter is not tied to the model of the phone, and to the phone. SIM-However, it is on smartphones of this brand, especially in global versions of firmware, that sometimes fails when automatically updating network settings. SIM-mapping MIUI The message center address may be lost to a default value that does not work in your region.
⚠️ Attention: Incorrect number format SMSC (For example, the absence of a country prefix or extra characters may result in a complete blocking of outgoing messages until the error is corrected.
And also, understanding how SMSC works helps you diagnose problems faster, because if you don't have incoming calls, but the Internet is working, it's not really the center of the message, but if you have the Internet, the calls are going through, and no messenger that uses a standard phone book for verification sends SMS, 90 percent of the time, the culprit is here.
Where to find the current number of your operator's SMS center
Before you make changes to the settings of the Redmi Note 8 Pro, you need to get the exact numeric code that your carrier requires. This data is unique to each provider and often varies even within the same country for different regions. Using universal numbers from the Internet may not work, so it is best to consult official sources.
The most reliable way is to visit your operator’s official website in the support or technical settings section, which usually publishes current SMSC codes for all types of devices, including Android, and this information can be obtained by calling the technical support team, where the operator will dictate the number you need or send it in an automatic message.
For major Russian operators, the current settings are as follows: Note that the recording format is critical: the number should be in quotes and start with a plus, as shown in the table below.
| Operator. | SMSC number (input format) | Region of action |
|---|---|---|
| MTS | "+79168991000" | Moscow and MO |
| Beeline | "+79039740000" | Moscow and MO |
| MegaFon | "+79261200500" | Moscow and MO |
| Tele2 | "+79260000500" | Moscow and MO |
For example, for St. Petersburg or Siberia, the same MegaFon or MTS will have completely different endings of the number. Always check the information specifically for your region to avoid errors when setting up Xiaomi.
Modifications through Engineering Menu (CIT)
On the Xiaomi Redmi Note 8 Pro smartphones, there is a built-in tool for testing equipment, known as CIT (Customer Integration Test) or engineering menu. Through it you can access deep modem settings, including changing the SMSC settings. This method is considered the most secure, since the menu interface is adapted for users and eliminates the input of incorrect characters.
To enter the diagnostic menu, open the Phone app and dial the combination ##6484##. If the menu does not open automatically, your version of MIUI may need to be activated via settings. Go to Settings → About Phone → The kernel version and quickly click on this line 7-10 times until the testing menu appears.
☑️ Checking before entering CIT
In the list you have opened, find the item associated with SIM-card or telephone (often called a telephone"SIM Card Test" or "Phone Test"). Search for the option inside this section"SMSC". When you click on it, you'll see the current number and the field to enter a new one. Enter the current number in an international format, be sure to start with a plus, and click "Update" or "Set".
After a successful update, the system should report this with a short notification: Restart your Redmi Note 8 Pro to allow changes to take effect at the radio level, preferably because it does not require third-party software installation and works even on locked devices.
Using the application to manage SIM
If you are not able to access the engineering menu or prefer a more visual interface, a great solution is to use specialized applications from the Google Play Store. One of the most proven tools is the application "SIM Tool Manager" or "Force LTE Only (4G/5G)", which have functionality for working with SMSC.
Install the selected application and give it the necessary permissions to access the phone and SMS. Once you start, find the tab "SMS Center" or "SIM Settings." The application automatically reads the current message center number from the phone's memory and displays it in a readable form. To change, simply enter a new number in the field and click the update button.
⚠️ Note: Some applications may request broad permissions. Use only proven high-rated utilities to avoid sharing personal data with third parties.
The advantage of using third-party utilities on Xiaomi is the ability to save profiles. SIM-You can save the settings for each carrier in advance and switch between them in one click. This is especially convenient for owners of two-symbol Redmi Note 8 Pro, which use tariffs from different providers.
Why the app can’t see SIM-map?
Manually configure through Android codes and commands
For advanced users who don’t want to install unnecessary apps, there is a method of direct commands through the dialing interface. On pure Android and some shells, code ##4636## runs, which opens the test menu. However, on Xiaomi Redmi Note 8 Pro with global firmware, this code is often blocked, so you may need to use Activity Launcher.
Download the Activity Launcher app from the Play Store. Search Activity after you launch"SMSC". You need to find the activity that belongs to the system (com.android.phone package), clicking on it, you will be taken to a hidden menu where you can see the current address and ask a new one "+79xxxxxxxxx" and confirm the action.
Example of the correct format:
+79168991000
Example of incorrect format (causes an error):
89168991000
0079168991000
+7 916 899 10 00It's important to follow the syntax: no spaces, brackets or dashes. Only plus, country code and number. If you don't see changes after you type in and click the Update button or you get an error, then the current version of MIUI is blocking direct recording through this interface, and it's worth switching to the method with the engineering menu or application.
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If you don't send SMS after you change your number, turn on flight mode for 10 seconds, and then turn it off, and this will force you to re-register your phone with the new settings.
Diagnostics and solution of typical problems
Even after the correct change of SMSC to Redmi Note 8 Pro, it can be difficult, often users are faced with a situation where the number seems to have been updated, but the messages still do not leave, in which case additional diagnostics should be carried out, eliminating software conflicts and network errors.
The first thing to do is to check if the shipment itself is blocking the shipment. SIM-Put it in another phone and try to send a message. If it works, the problem is definitely Xiaomi settings. If it doesn't, contact the carrier, maybe a service. SMS blocked on the network side or the account is out of money.
You should also look at the Messages app. In MIUI, it has its own settings that may conflict with system settings. Go to the message settings, look for the "Additional" or "SIM settings" section and make sure that the old address is not written there. Sometimes cleaning the Messages app cache through the application management menu helps.
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Changing SMSCs only solves the problem if messages are not sent at all. If messages leave but delivery reports don't arrive, the problem may be on the recipient's side or in roaming.