Xiaomi's modern smartphones are famous for their functionality, but sometimes users face classic mobile communication problems. One of the most common and annoying situations is the inability to send a text message. The screen hangs on the status of "Send", and then comes the report of failure. In most cases, when the Internet is working properly and calls go smoothly, the root of the evil lies in the incorrectly specified number of the SMS center.
Many owners of Redmi and Poco devices do not even suspect that a special operator gateway, registered in memory, is responsible for sending each "sms" SIM-If that address is lost or lost, the phone doesn't know where to send your data. MIUI HyperOS has hidden and explicit ways to fix this situation.
In this article, we will take a look at where the message center number is set up, how to check it, and what to do if standard methods don’t work, learn how to use the engineering menu for diagnostics, and learn what commands to enter to automatically adjust your mobile operator’s network settings.
What is the SMS Center number and why is it needed
The Short Message Service Center (SMSC) number is a unique phone number that belongs to your mobile operator, and it acts as an intermediary: when you send a message, it first goes not directly to the recipient, but to this center, where it is stored, the availability of the recipient is checked, and then sent further. If the recipient is temporarily unavailable, the center stores the message and delivers it as soon as the phone enters the network.
In Xiaomi devices, this number is usually written automatically when you first install it. SIM-The operator transmits the configuration packet over the network, and the phone sets up all the parameters:
- 📉 Accidental reset of network settings by the user.
- 📉 Conflict in reshuffling SIM-Maps from the old phone to the new Redmi.
- 📉 Error in updating the firmware MIUI, When the operator profile is incorrectly updated.
Without a properly specified message center number, outgoing SMS communication is completely blocked at the device level. The phone simply cannot initiate data transfers because it does not see the “starting point.” It is important to understand that incoming messages may come (since the operator knows where to find you), but you will not be able to respond.
💡
If you have changed your carrier but left the old one SIM-map (MNP), Make sure that the message center number of the previous operator is not left in the settings.
How to find the number of the SMS-center in the standard menu Xiaomi
The easiest and safest way to check or change a gateway address is to use the built-in shell interface. Depending on the version of MIUI (12, 13, 14) or HyperOS, the path to settings may vary slightly, but the logic remains the same. You don't need superuser rights or a computer connection.
To start, open the standard Messages app, which has a blue icon with a white envelope. It's a system application, and it's the deep settings that are hidden in it. Click three dots in the top right corner of the screen to call the drop-down menu, and select Settings.
The algorithm of actions is as follows:
- 📲 Find the "Advanced" or "Advanced" section).
- 📲 Select the right slot SIM-cards if you have two of them (SIM 1 SIM 2).
- 📲 In the window that opens, find the field "Message Center Number" or"SMSC".
This is where the current numeric code is displayed. If the field is empty or contains incorrect data, it can be edited. Usually the number looks like a long sequence of numbers, often starting with the country and operator code (for example, +79... for Russia). After making changes, be sure to click the "Install" or "Save" button, otherwise the phone will not apply the new parameter.
☑️ Checking the SMS settings
Using engineering code to check parameters
If the GUI has locked settings or the field is not edited, the Android Engineering Menu comes to the rescue, a powerful diagnostic tool that every Xiaomi smartphone has, and it allows you to access the hidden functions of the radio module and see the real status of registration on the network.
To enter the diagnostics menu, type the special code in the phone book: ##4636##. Once you enter the last star, the menu will open automatically. You are interested in the "Phone Information" section. SIM-cards, there will be two such sections - choose the one that corresponds to the problem SIM.
Inside this section, scroll down to the "SMSC" button. When you click on it, you'll see a pop-up with the current center number. There are fields to update:
- 🔍 Refresh – Requests the current number from the network operator right now.
- 🔍 Update – allows you to manually enter the number and forcefully register it in the module.
- 🔍 SMSC Status – shows the connection status of the center.
⚠️ Be very careful in the engineering menu. Do not change the settings of the type of preferred network (for example, with the following settings): LTE on 3G) unnecessarily, this may temporarily cut off the connection to the tower.
Using #4636## is the gold standard for advanced users, and it allows you to bypass possible MIUI bugs when the visual part of the settings does not show the real state of affairs in the modem.
What if the code doesn't work?
Table of SMS-centers numbers of popular operators
Often, automatic setup does not work and manual input requires accuracy to the last digit. A single digit error will keep messages in the outgoing. Below is a table with the current number of the centers for the main operators of the CIS countries. These data are official and published by the operators.
Entering a number in the settings field usually requires a plus format, such as +79160009999. If your phone requires an international format, be sure to save the plus sign. In some cases, if the number is not accepted, try entering it without a plus, but this is rare for modern versions of Android.
| Operator. | Country. | SMS number | Note |
|---|---|---|---|
| MTS | Russia | +79160890111 | Main number |
| MegaFon | Russia | +79261500150 | Works in all regions |
| Beeline | Russia | +79037000611 | Alternative: +79037000111 |
| Tele2 | Russia | +79050000505 | Depends on the region. |
| Kcell | Kazakhstan | +77010000100 | Active for all tariffs |
If your carrier is not on the list, the most reliable way to find out the number is to call support or find information on the official website in the "Help" section. SIM-card.
💡
The correct number of the message center is critical only for classic SMS. Messengers (Viber, WhatsApp, Telegram) work over the Internet and do not depend on these settings.
Delivery problems and their solution through resetting settings
Even if the center number is correct, messages may not leave due to software conflicts. The MIUI shell sometimes accumulates errors in the cache of system applications. If you see that the number in the settings is correct, but the status "Submit" hangs forever, you need to reset the settings of the application "Messages".
This action won't delete your correspondence, but it will return the application to factory settings. Go to Settings → Applications → All Apps. Find Messages. Click on Memory and select Clear or Reset.
After this procedure, the phone can request permission to access the contacts and SMS again. Allow all requests. Then try sending a test message. If the problem was a software glitch, it should disappear.
⚠️ Warning: Before resetting your settings, make sure you have a backup of important dialogs if you only use sync within the app, although the story is usually saved in the phone database.
Another reason could be blocking from antivirus or Xiaomi’s built-in protection. Check the Security app, go to Permissions and make sure the Messages app has access to the network and background activities.
Operator commands for automatic setting
If manual entry of the number seems difficult to you or you are afraid of making a mistake in the numbers, you can use the service number. USSD-Operators have a mechanism whereby the phone requests and receives all the necessary parameters, including the address. SMSC, MMS internet.
For most operators, it is enough to send SMS You can use "0" to 999 (or another short number specific to your region), but a more universal method is to call or send. USSD-For example, for many operators, there is a command *105# or *111#, which has a menu item called "Service Guide" or "Internet settings".
After you send the request, you will receive an SMS with configuration data.
- 📥 Open the message received.
- 📥 Press the "Accept" or "Install" button".
- 📥 Enter. PIN-Protection code, if requested (standard frequency 0000 or 1234).
Once installed successfully, the profile will remain in the system. Restart the Xiaomi smartphone so that the changes are guaranteed to take effect. This method is good because the operator sends the center number that is relevant to your specific base station and region.