You're trying to send SMS Xiaomi Redmi 9 Pro, but the message persists, and the system gives an error "failed to send"? SMS-The center is a special number through which all text messages are routed. On Xiaomi smartphones, this option is sometimes reset after an update. MIUI shift SIM-Finding it on the menu is not as easy as it seems.
In this article, we will discuss 3 ways to open SMS-Redmi 9 Pro (relevant for all modifications: M2007J3SC, M2007J3SI, M2007J3SG), including hidden engineering menus that are not documented in Xiaomi's official help, and you'll learn how to check the number is correct. SMS-the center of your operator (MTS, Beeline, Tele2, MegaFon) and what to do if the messages are still not sent.
What is it? SMS-The center and why it is important to the Redmi 9 Pro
SMS-centre SMSC — Short Message Service Center is a mobile operator server that handles text messaging and delivery. Without the correct center number, your Redmi 9 Pro won't be able to physically send messages. SMS, even if the network SIM-The card is working properly.
On Xiaomi smartphones, the problem is compounded by the fact that:
- 📱 MIUI conceal SMS-Download the deep menu (as opposed to the naked Android).
- 🔄 After updating the firmware or resetting the settings, the center number can be reset to a default (often non-working).
- 📶 Some operators (for example, virtual operators) MVNO) don't give me a number SMSC automatically.
If you encounter an error, "No message sent. Repeat?", 90% of the time it's the fault. SMS-Next, we'll show you how to find and fix it.
Method 1: The standard path through Messages (MIUI 12–14)
The easiest method is to use the built-in Messages app from Xiaomi, but depending on the version of MIUI, the path may be slightly different.
- Open the Messages app (an envelope icon).
- Press three points (⋮) top-right → Select Settings.
- Scroll down and find the Additional or Advanced Settings section.
- Tap to the center. SMS-messages (or) SMSC).
- Enter your operator’s center number (see table below) and press OK.
If the item SMS-No message, so your version is not MIUI Go to Method 2, get to it.
Make sure that SIM-The card is active and catches the network
Check the balance (some tariffs block SMS at zero)
Write down your operator’s SMSC number (see table below)
Restart your phone before setting up-->
Numbers. SMS-Centers for Popular Operators (2026)
Enter a number without spaces, dashes and pluses! For example, for MTS, use 9800900900, not +7 (980) 090-09-00.
| Operator. | Number. SMS-centre | Notes |
|---|---|---|
| MTS | 9800900900 | For all regions of Russia, some tariffs may differ. |
| Beeline | 9037000000 | Relevant for new SIM-maps (2020)+). Older cards can use 9030,000,000. |
| Megaphone | 9250000900 | In the regions there can be 92500009XX (where XX is the region code). |
| Tele2. | 9505000000 | A single number for all of Russia, and virtual operators (e.g., SberMobile) may not work. |
| Yota | 9990000900 | Only for Yota subscribers. SIM-Cards of other operators are not applicable. |
⚠️ Note: If you use a virtual operator (e.g. Tinkoff Mobile, SberMobile, Summer), check the number SMSC in the personal office or at the support. Universal values for MVNO no!
Method 2: Engineering menu (for experienced users)
If the standard path didn’t work, you can turn to Xiaomi’s hidden engineering menu, a method that requires caution, as wrong actions can disrupt the network.
Instructions:
- Open the phone app and enter the combination: ##4636##
- In the menu that appears, select Phone Information (or Phone Information).
- Scroll down to the SMSC block.
- Click Update → Enter the center number (from the table above) → Save.
🔹 Note: On some versions MIUI If nothing happens after you enter the code, try an alternative method:
Settings → About Phone → MIUI Version (step 7 times in a row) → Return to Settings → Additional → Engineering menuWhat to do if the engineering menu is not opened?
Method 3: Using third-party apps (if nothing helps)
If none of the above methods worked, there is a version with the installation of specialized software, and we recommend two proven applications:
- 📲 SMS Center (from Ritesh Sahu) – a simple app to view and modify SMSC. Link to Google Play.
- 🔧 Network Signal Guru – Advanced Network Diagnostics Tool that Includes Editing SMS-The center. Link to Google Play.
How to use:
- Install one of the applications.
- Run it and give permissions to access the SMS.
- Find the SMSC Settings or SMS Center section.
- Enter the center number (from the table above) and save the changes.
- Reboot the phone.
⚠️ Note: Some antiviruses (e.g. Avast or Dr.Web) may block these applications, mistakenly mistaking them for malicious.
1. Network Mode: Switch to Settings → SIM-maps and mobile networks → Preferred type of network only 3G (sometimes 4G/LTE block SMS).
2. APN-settings: make sure they match your operator (can be reset to factory).
3. Balance: on some tariffs (for example, "For laptop" from MegaFon) SMS They are blocked even when there is a positive balance.—>
Frequent mistakes and their solutions
Even after the right setup SMS-So, if you don't send a message, you can look at the typical problems and how to fix them:
| Mistake. | Reason. | Decision |
|---|---|---|
| No message sent. | Wrong number. SMSC or SIM-card. | Check the center number and status SIM-maps in Settings → SIM-map. |
| No network when sending SMS | The phone is only connected to 4G (LTE) where SMS is not supported. | Enable 3G/2G mode in network settings. |
| The message goes away, but does not reach the addressee | Problems on the operator’s side or blocking spam. | Try sending an SMS to another number or contact the operator. |
| The "Messages" app freezes | Conflict with cache or application data. | Clear the cache: Settings → Applications → Messages → Storage → Clear the cache. |
If none of these methods worked, the problem may be deeper:
- 🛠️ Communication module damaged – diagnostics required at service center.
- 📵 SIM-The card is faulty – try inserting it into another phone.
- 🔄 Firmware conflict – if you have installed custom software (for example, LineageOS), SMS may not work.
💡
If after all the manipulations SMS They don’t send, but the calls work – the problem is not exactly in the SIM-It's probably the software's fault: try resetting the network settings (Settings) → System system → Reset → Reset network settings) or reinstall the Messages app».
More tips for owners of Redmi 9 Pro
To avoid future SMS issues, follow these guidelines:
- 🔄 Update regularly MIUI — In new versions of firmware, bugs with sending messages are corrected.
- 📱 Use the original Messages app – third-party messengers (e.g. Textra or Textra) QKSMS) They may conflict with the settings. SMSC.
- 📡 Check the coverage area – in roaming or at the network border SMS They may be delayed.
- 🔋 Watch your battery power – at levels below 5%, some operators block shipments SMS.
If you travel frequently, it is useful to know that in some countries (such as China or the UAE) local operators may block the use of the Internet. SMS foreign SIM-In such cases, use messengers (WhatsApp, Telegram) or the Internet.-SMS.