The problem of sending text messages is one of the most common scenarios faced by owners of Xiaomi, Redmi and Poco smartphones. SIM-The cards don't help, and technical support often recommends checking or rewriting the SMS number, which is a specialized node in the operator's network that acts as an intermediary when delivering your messages to the recipient.
Many users are unaware that on an Android operating system with a MIUI shell or HyperOS, this parameter can be hidden from the eyes of the average user. The absence of a direct button in the standard settings menu is puzzling, but there are proven ways to access this information using engineering codes or special applications.
In this article, we will discuss in detail all available methods, from simple to simple. USSD-You will learn not only to find the current number, but also to correctly make changes if the operator changes the gateway or there is a software failure. Properly configuring this setting often solves the problem of “hang” messages without having to carry the phone to the service.
What is an SMS Center and Why is it Important?
SMS Centre (SMSC — Short Message Service Center is a mobile operator server that processes all incoming and outgoing text messages. SMS, It first gets to this server, which locates the recipient and delivers the message. If the recipient is temporarily unavailable, the center stores the message and tries to resend it within a given time.
Without a properly written center number, the phone will not be able to send any messages, although incoming messages can come in normally. SIM-But when you change handsets, when you flash your phone, when you use old ones. SIM-Cards may cause conflicts.
Errors in setting this setting cause the message to remain in the "Send" status and after a while the delivery report comes in. It's important to understand the difference between the SIM card phone number and the service center number. These are two different identifiers, and you can't confuse them.
- 📱 SMS number of the center is the technical address of the operator's server in an international format.
- 🔄 The center guarantees the delivery of the message even in the temporary absence of the network from the recipient.
- ⚙️ Incorrect number leads to complete blocking of outgoing correspondence.
Use of the USSD-number-checker
The fastest and safest way to find out the number of SMS center on any Xiaomi phone is the use of special devices. USSD-These codes are universal for most operators and do not require an Internet connection. To get information, you just need to open the standard "Phone" program through which you make calls.
Enter the command *#5005*7672# and press the call button. The screen will instantly pop up with the current message center number for the active message. SIM-This method works at the protocol level. GSM It doesn't depend on the version of the shell. MIUI. If you have a two-sim smartphone, the request must be made for each card separately, first switching to them.
There are also variations of codes that can work for different operators, for example, the command *#5005*7672+7 digits of a number# is used to write a new number, but a basic query is enough to view it. If nothing happens after entering the code or a connection error occurs, then the operator blocks this request or uses a non-standard protocol.
⚠️ Warning: Do not attempt to enter the new message center write codes without first consulting the operator. A single digit error can completely block the ability to send SMS until the correct settings are restored.
☑️ Checking the communication settings
How to find a SMS center through the engineering menu Xiaomi
If USSD-The codes don't work, or you want to get more information about the state of the network, you can use the engineering menu of your smartphone. On Xiaomi devices, access to it is often closed, but you can activate it through a special application or code. This menu contains detailed technical information about the radio module.
To enter the engineering menu, dial ##4636##. If the menu does not open, you may need to install a third-party application, such as "Activity Launcher" or "Shortcut Master", to find hidden activity "Testing". In the list that opens, select "Phone Information".
Inside the section, find the drop-down menu or button"SMSC". Clicking on it, you will see the current number in the format PDU It's also where you often have a Refresh or Query button that compels you to request a current number from the operator's network, which is especially useful if you just inserted a new one. SIM-The card and the phone has not yet received the settings.
| Parameter | Description | Importance to users |
|---|---|---|
| SMSC Address | Address of the communication centre | The main number that needs to be checked |
| Signal Strength | Signal level | It helps to know if there is a connection with the tower. |
| Network Type | Type of network | Shows mode of operation (LTE, 3G, GSM) |
| IMEI | Device identification | Your unique phone number |
What to do if the engineering menu is empty?
Configure through applications to work with SIM
In modern versions of Android, access to direct SMS number changes through standard settings is often restricted to security rights. However, there are specialized applications that use system APIs to read and write these parameters. One of the most reliable tools is the SMS Center Number app or analogues from the Play Market.
Once you install the app, you will need to give him permission to use your phone and SMS. The program automatically counts the current center number for each SIM card and displays it on the screen. If the number is missing or incorrect, you can enter the correct one received on the operator's website or through support.
Using third-party software is especially relevant for Xiaomi models, where the standard message interface does not have a field to enter this setting. The application acts as a bridge between the user and the system files of the modem configuration.
- 📲 Download the proven management application SMSC log-store.
- 🔐 Provide the necessary permissions to access network settings.
- ✏️ Enter the number of the center in the international format (for example, +79160000000).
- 💾 Click the Update or Save button to save the changes.
💡
Before changing the SMS number, write down the old value on paper or take a screenshot, which will allow you to quickly return the original settings if the new parameters are not working.
Solving problems with sending messages
Even with the right SMS number, messages may not be sent. Often the problem is not in the number itself, but in numbering formats or software conflicts. On Xiaomi phones, you often find a situation where the standard Messages app does not work correctly after a system update.
Try clearing the messaging app cache. To do this, go to Settings → Apps → All apps → Messages and select Clear Cache. Don't confuse it with clearing the data, as this can delete your email history if it's not synced to the cloud. It's also worth checking if the message is in draft or wait mode.
If the problem persists, reset the network settings. This action will return all connection parameters, including access points. APN And the message center numbers, to the factory values that the operator transmits when you register on the network. → Connection and sharing → Reset Wi-Fi, mobile networks and Bluetooth.
⚠️ Note: Resetting your network settings will remove all saved passwords from Wi-Fi and other Bluetooth devices. Prepare your home network passwords in advance to reconnect.
💡
In 90% of cases, the problem is solved by simply restarting the phone after checking the SMS number, so don't rush to make complex resets until a simple reboot is tried.
Frequent errors and ways to fix them
When setting up for themselves, users often make common mistakes, the most common of which is the wrong number format. The SMS number of the center must be entered in an international format, starting with the plus and the country code. For Russia it is +7, for Ukraine it is +380, etc. The absence of a plus or using an eight instead of a country code often leads to an error.
Another problem is dual-SIM devices: users change the settings for one SIM card to try to send a message through the second. Xiaomi’s message menu needs to clearly monitor which card is selected to send at the moment. The SMS settings of the center for different operators (for example, MTS and Beeline) are always different.
Sometimes antivirus programs or built-in MIUI protection block the change in system settings. If the application to change the number gives an access error, try temporarily disabling the protection or giving the application extended rights in the "Permissions" section.
Can I send an SMS without the SMS number?
Will the SMS number reset after the firmware update?
Why is the number of the center different from the one on the operator’s website?
In conclusion, setting up a SMS center on Xiaomi is a rare procedure, but necessary in case of failure. Using the methods described above, you can diagnose and fix the problem yourself in a few minutes.