How to check and configure SMS-center on Xiaomi Redmi smartphones: the complete guide

If Xiaomi Redmi has stopped sending or receiving SMS, The problem may be incorrect settings SMS-The center is a special number through which all text messages are routed, and this option is usually set automatically when installed. SIM-It's a card, but sometimes it gets lost after you update your firmware, change your operator, or manually tamper with your system files, unlike calls that work directly between subscribers, SMS Pass through the operator’s intermediate server, and if the address is incorrect, the messages are simply “lost” along the way.

In this article, we will discuss 4 ways to check SMS-Redmi center, including Note 12, Redmi 10, POCO X5 And others, explain why it can get lost, and show how to manually fix the number for all Russian operators - MTS, Beeline, MegaFon and Tele2. MIUI with the help of an engineering menu.

What is it? SMS-The center and why it is important for Xiaomi Redmi

SMS-centre SMSC — Short Message Service Center is the phone number that your smartphone uses to route text messages. SMS, It first gets to the operator’s server (at the address). SMSC), If the number of the center is incorrect or missing, the message is delivered to the recipient:

• 📤 Do not send – remain in the status of “Sending” or disappear without notice.
• 📥 Not accepted – the sender receives an error and you don’t see the incoming SMS.
• ⏳ Delayed – messages arrive hours or days late.
• 🔄 Duplicate - one SMS It may come 2-3 times.

On Xiaomi Redmi smartphones, the problem often occurs after:

• 🔄 Updates MIUI — New firmware versions can reset network settings.
• 📱 Shifts SIM-Cards – if you insert a card from another operator, and SMSC It's not automatically updated.
• 🛠️ Manual editing of system files (for example, through MTK Engineering Mode or Qualcomm QPST).
• 🌍 Roaming – when connecting to foreign networks SMSC may forget».

Most of the time, the number SMS-The center is set up automatically when you first connect to the network, but if you don't, you'll have to type it manually.

Method 1: Verification SMS-Center through standard settings MIUI

The easiest method is to use the built-in MIUI settings. It works on all Redmi models (from Redmi 9A to Redmi Note 13 Pro+) and does not require root rights or special knowledge.

1. Open the Messages app** (an envelope icon).
2. Click on the three dots in the upper right corner and select Settings → Additional Settings.

Below is a table with current numbers. SMS-centers for Russian operators (data checked in 2026):

Note: If the SMS Center field is inactive (grey), your operator will block manual change of this setting.

Make sure that SIM-The card is active and catches the network

Check the balance (some tariffs block SMS at zero)

Write down the current SMSC number (in case of rollbacks)

Restart your phone before setting up-->

Method 2: Use of the USSD-code-check SMSC

If the settings menu MIUI prevents SMS-center, you can use it USSD-codes – special instructions that are executed directly through the module SIM-This method works even on locked phones and does not require access to settings.

Enter in the application "Phone"** (as if calling) one of the following codes:

• 🔢 To verify the current SMSC: ##4636## → Select "Phone Information» → scroll to the block «SMSC».

If nothing happens after entering the code:

1. Make sure you enter the characters accurately (without spaces, with the correct number of * and #).
2. Make sure that SIM-card USSD-Some virtual operators block them).
3. Try entering the code in call mode, not in the message field.

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If USSD-The codes don't work, try typing them in through the Engineering Mode app, which you can download from Google Play» → «SMSC Settings».

Method 3: Change SMS-The main menu is the engineering menu (for advanced ones)

If standard methods don’t work, you can use the Xiaomi engineering menu, which is suitable for models on Qualcomm Snapdragon processors (for example, Redmi Note 11 Pro+, POCO F4) and MediaTek (Redmi 10C, Redmi 9T).

Instructions for Qualcomm:

1. Enter the code ##4636## in the Phone app.
2. Select “Phone Information”**.
3. Scroll down to the SMSC block and click Update.

Instructions for MediaTek:

1. Find the SMSC Address field and enter your operator number.

⚠️ Attention: On some firmware MIUI If there's nothing going on after you enter #4636##, then your version is MIUI Restrict access. In this case, try Method 4.

Method 4: Forced resetting of network settings

If none of these methods worked, maybe the problem isn't SMSC, but the general network settings, and then a complete reset of network settings will help, which will remove all stored Wi-Fi networks, passwords and mobile settings, but often solves SMS problems.

How to reset your network settings on Xiaomi Redmi:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-map and click "Reset network settings»**.
3. Confirm the action and restart the phone.

After the reboot:

• 🔄 SMS-The center should update automatically (check in the message settings).
• 📶 You may need to manually select the operator in the settings → SIM-map → Choice of network.
• 🔐 If SMS still not working, check if they are blocked by an antivirus or an app to save traffic (for example, “Security” or “Optimization»).

⚠️ Note: Some Redmi models (e.g. Redmi) A1 or Redmi 8A) Network resetting can lead to loss IMEI. Before performing the operation, make sure you have a backup copy. IMEI (It can be saved through the application «IMEI Backup»**).

Frequent mistakes and their solutions

Even after the right setup SMS-The message center may not work. Here are the most common problems and ways to fix them:

If none of the solutions worked, the problem could be related to:

• 📵 Hardware malfunction (damaged communication module).
• 🔧 Incorrect firmware (for example, the Chinese version is installed) MIUI global phone).
• 🛡️ Blocking the operator (for example, for non-payment or at the request of law enforcement agencies).

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If after all the manipulations SMS It still doesn’t work, try to insert it. SIM-If the problem persists, contact the operator. SMS working on another device – a malfunction in your Redmi (may need firmware or repair).

Additional tips for working with SMS on Xiaomi Redmi

To avoid future SMS issues, follow these guidelines:

• 🔄 Update regularly MIUI — New versions of the firmware correct communication errors.
• 📱 Do not use network optimizers (e.g. Dual Apps or Second Space) if you notice a problem with your network. SMS.

If you travel abroad frequently, consider that roaming is a must. SMS-The center can automatically change to the local center to avoid problems:

1. Before traveling, write down the SMSC number of your Russian operator.
2. In roaming, manually check if the center has gone off (via ##4636##).
3. Use instant messengers (such as WhatsApp or Telegram) for important messages – they are not dependent on SMSC.

FAQ: Answers to Frequent Questions