Setting up SMS-Xiaomi Center: How to Fix Message Errors

Problems with sending SMS on smartphones Xiaomi, Redmi or POCO Often associated with incorrect settings SMS-The center is a server that sends text messages through, and even if the SIM card is active and the network signal is stable, the messages can get stuck in the status of "sending" or arrive at the destination with a delay of several hours. SMS-a center that either went astray after updating the firmware or was initially incorrectly specified by the operator.

In this article, we will discuss how to check the current settings, manually specify the correct center number for your operator (MTS, Beeline, MegaFon, Tele2 or Yota), and what to do if messages are not sent anyway. MIUI, Not visible in the standard Message Menu, but affecting the work SMS.

If you’re faced with messages only leaving after a phone restart or when Wi-Fi is turned on (although SMS must be running over a mobile network), the problem is almost certainly with SMSC (Short Message Service Center) settings. Unlike iPhones, where these settings are usually set automatically, Xiaomi sometimes has to adjust them manually — especially after changing the SIM card or resetting the phone to factory settings.

It is important to understand that the number SMS-The center is tied to the operator, not the phone model, which means that the instruction will be suitable for any Xiaomi device, from the budget Redmi Note 12 to the flagship Xiaomi 14 Ultra, if we are talking about Russian or international SIM cards. But for the Chinese versions of smartphones (without global firmware) may require additional steps – we will also talk about this.

What is it? SMS-The center and why it matters

SMS-centre (SMSC) — It's a mobile operator server that processes and routes text messages. SMS, It gets to that server first, and then to the recipient from there, and if the center number is incorrect or the server is not available, the message "hangs" in the status "sent" or does not leave at all.

On smartphones Xiaomi number SMS-The center is usually set up automatically when you first install the SIM card, but in some cases the autoset fails:

• 🔄 After the firmware update MIUI Up to the new version (especially when moving to the new version) MIUI 14/15)
• 📱 When transferring a SIM card from another phone (for example, from an iPhone or Samsung)
• 🌍 When using a SIM card of a foreign operator in roaming
• ⚙️ After resetting the phone to factory settings

If the center number is not specified or is incorrect, you may encounter the following problems:

• ❌ No messages are sent, although the network indicator shows the full signal.
• ⏳ SMS They leave with a delay of several hours.
• 📤 Messages get stuck in the “sent” status and disappear after rebooting
• 💬 Incoming SMS They come, but they don’t (or vice versa)

On Xiaomi smartphones with firmware MIUI 12 and newer SMS-The center can be reset when you change the SIM card slot (for example, if you moved the card from slot 1 to slot 2.

How to check the current number of the SMS-center on Xiaomi

Before you make any changes, make sure that the problem is really with the SMSC settings. You need to know the current center number, and you can do this in two ways: through the standard message menu or using engineering code.

Method 1: Through Message Settings

1. Open the Messages app (the envelope icon).
2. Slip on the three points in the upper right corner → Settings.
3. Select Extra or Advanced Settings (the name may vary depending on the version of MIUI).
4. Find the center. SMS or SMS-centre.

If this menu displays a number (e.g. +79991234567), write it down, it will be used to compare it with your operator's reference values. If the field is empty or contains incorrect characters (e.g. +00000000000), this is the cause of the problem.

Method 2: Through engineering code (for advanced users)

1. Open the Phone app.
2. Enter the combination: ##4636###.
3. In the menu that opens, select Phone Information.
4. Scroll down to the SMSC block, where the current center number will be indicated.

⚠️ Note: On some Xiaomi models (e.g, POCO X5 Pro or Redmi 12, the engineering menu can be blocked, in which case use only the first method or utility like SMS Center Fixer from Google Play.

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If in the settings SMS-The center displays the number in format +79101234567, but no messages are sent, try to delete the first digit 7 (leaving the first digit behind) +9101234567 – sometimes this helps in format conflicts.

SMS-center numbers for Russian operators (2026)

Each mobile operator has a unique number. SMS-If your Xiaomi settings have the wrong number, messages will not be delivered. Below is the current table with the number of the centers for the main Russian operators:

If your operator is not listed in the table (for example, Tinkoff Mobile, SberMobile or regional providers), specify the number. SMS-center in one of the following ways:

• 📞 Call in support of the operator (the number is usually indicated on the back of the SIM card).
• 🌐 Check the official website of the operator in the section "Phone settings».
• 📱 Insert the SIM card into another phone (such as an iPhone or Samsung) and see the center number in its settings.

Important: Numbers SMS-Centers for Virtual Operators (MVNO), Tinkoff Mobile or SberMobile often match the numbers of the parent networks (e.g. Tele2 or MegaFon.

How to manually change the number of the SMS-center on Xiaomi

If the current center number is incorrect, you can manually correct it.

Instructions for MIUI 12/13/14/15:

1. Open the Messages app.
2. Click on the three dots in the upper right corner → Settings.
3. Select Additional → Centre SMS.
4. Enter the correct center number for your operator (see table above).
5. Press OK or Save.
6. Reboot the phone.

If the SMS Center item is not in the menu:

1. Install SMS Center Fixer (or similar) from Google Play.
2. Open it and enter the center number manually.
3. Save the changes and restart the device.

Make sure the number is entered without errors|Reboot the phone|Send a test. SMS himself|Check the status of the shipment (should change to "delivered")-->

What to do if the changes are not maintained?

• 🔧 Check if there are no locking apps on the phone SMS (For example, Truecaller or SMS Blocker – they can reset settings.
• 📱 Try inserting the SIM card into another slot (e.g., from slot 1 to slot 2).
• 🔄 Update the firmware MIUI Up to the latest version – in the old versions there was a bug with saving settings SMSC.

⚠️ Note: Some Xiaomi models (e.g. Redmi Note 11 Pro)+) manually SMS-You may need to reset your network settings. → SIM-maps and mobile networks → Resetting network settings.

Solving problems if SMS is not sent anyway

Even after the correct setup SMS-The message center may not leave. Here are the most common causes and ways to address them:

1.Sim card does not support SMS

• 📶 Check if the service is active «SMS» in your tariff (some operators turn it off by default for new SIM cards).
• 💳 Make sure there is enough money in the account – some operators block the sending SMS negative-balance.

2. Conflict with the annexes

• 🚫 Temporarily disable antivirus (Avast, Kaspersky) and spam blockers (Truecaller).
• 📥 Check if there is a third-party app on the phone SMS (For example, Textra or Pulse. SMS) — It can intercept the shipment.

3. Problems with the mobile network

• 📡 Switch from 4G/LTE on 3G in network settings: Settings → SIM-maps and mobile networks → Type of network → 3G.
• 🔄 Turn on and off Flight Mode (sometimes this resets network settings).

Hardware malfunctions

• 📱 Try inserting the SIM card into another phone – if the problem persists, contact the operator for a replacement SIM card.
• 🔌 Check if your SIM tray or contacts are damaged (especially if your phone falls or gets wet).

Features of setting up SMS-center on Chinese versions of Xiaomi

If your Xiaomi smartphone is purchased in China (for example, models with a prefix) CN In the name, it may not have global firmware, and therefore support for Russian operators out of the box. SMS-The centre will need additional steps:

Problems with Chinese versions:

• 🌏 No point Centre SMS message-setting.
• 📵 No manual settings are saved SMSC.
• 🔠 Numbers of the centers are entered in an incorrect format (for example, without the need to +).

Decisions:

1. Install global firmware (e.g. MIUI Global or xiaomi.eu) via Fastboot or Recovery, which will add support for Russian carriers.
2. Use the SMS Center Fixer app, which bypasses the limitations of Chinese firmware.
3. Manually enter the number of the center through the engineering menu: ##4636## → Phone information → SMSC

Important: On the Chinese versions of Xiaomi (such as the Xiaomi 13 CN or Redmi K60 Pro), it may be necessary to unlock the bootloader before running the global version.This is an official procedure, but it resets all data on the phone.

⚠️ Note: Firmware of unofficial versions MIUI (For example, from xiaomi.eu) may cause loss of warranty.Before the procedure, make a backup of the data through Settings → Additionally. → Backup and reset.

How to reset SMS settings to factory

If you have experimented with the settings SMS-So you can get the message back to the center, and now you can't send it at all, you can get it back to the original state:

Method 1: Reset via message settings

1. Open Messages → Settings → More.
2. Find Reset Settings or Restore Default Values.
3. Confirm the reset.

Method 2: Completely reset network settings

1. Go to Settings. → SIM-maps and mobile networks.
2. Select Network Settings Reset (or Wi-Fi, Mobile Network, and Bluetooth Reset).
3. Confirm the action - the phone will restart.

Method 3: Reset via engineering menu (for power users)

1. Enter the code: ##4636###.
2. Go to the phone information.
3. Click on the three dots in the upper right corner → SMSC reset.

After the number's been reset. SMS-The center will be downloaded automatically from the SIM card. If this does not happen, enter it manually (see the table above).

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Resetting the network settings removes all stored Wi-Fi networks and passwords, as well as associated Bluetooth devices. Before the procedure, write down important data.

FAQ: Frequent questions about setting up SMS-center