Setting up SMS-center MIUI 12: Complete guidance with error solutions

Why? SMS-The center is important for stable message work on Xiaomi

On smartphones Xiaomi under control MIUI 12 correct work SMS-depends on the right setup SMS-the service number through which all outgoing messages are routed, if this parameter is lost (for example, after a change of SIM-You may have problems with your cards, firmware updates, or settings resets, and you may have problems with messages leaving indefinitely, not reaching the destination, or arriving late. 80% of the time, the wrong number is responsible for this. SMS-a center that the operator does not automatically transmit.

In this article, we will discuss how to check the current settings, manually specify the correct number. SMS-center for your operator (MTS, Beeline, MegaFon, Tele2 or virtual providers), as well as correct typical errors associated with sending SMS Xiaomi MIUI 12. we will pay special attention to the nuances that arise when using two SIM-card.

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

Before you change the settings, make sure the problem is real. SMS-To do this, check the current number through the engineering menu or standard settings:

1. Method 1: Through Message Settings Open Messages Application → Click on three dots in the upper right corner → Settings → Additional → SMS Center. The current number will be displayed here (if the field is empty – this is the cause of the crashes).
2. Method 2: USSD-Enter the number number number number number number number #4636##, go to the phone information and find the item SMS If the number is missing or does not correspond to the operator, it must be changed.

If both methods show an empty field or an incorrect number (e.g., a number that is not correct, +00000000000, go to manual settings. MIUI 12 some operators (e.g, Tele2) Can't pass on the number SMS-Automatically in the first installation SIM-Cards are a regular situation, not a firmware error.

Step-by-step instructions: how to change SMS-centre-on MIUI 12

For manual number assignment SMS-Do the following things in the center. SIM-The card is active and connected to the network - without this, the new settings will not apply.

Check the balance. SIM-Cards (should be positive)

Make sure the operator network is available (antenna icon in the status bar)

Write down the correct number. SMS-the center for your operator (see table below)

Close all background apps, especially instant messengers

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1. Open the Messages app (standard, not third-party!).
2. Slap three dots on the icon (⋮) top-right → Select Settings.
3. Go to the Additional section (in some versions of MIUI 12 it may be called Advanced Settings).
4. Find the center. SMS (or SMS-centre) and tap it.
5. Enter the number. SMS-the center of your operator (see table below) in the format +79XXXXXXXXX or +375XXXXX (Important: the number must be given without spaces and dashes!
6. Press OK or Save. Reboot your smartphone (required!).

After the reboot, send the test SMS to another number. If the message went well, the setting went well. If not, check the number you entered correctly or try an alternative method (see next section).

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If the number field SMS-Inactive (locked) center, try temporarily disabling the second SIM-map or reboot your phone in safe mode. Sometimes it unlocks your settings.

Numbers. SMS-Centers for Popular Operators (2026)

Below is the current table of numbers SMS-If your provider is not on the list, check the number on the official website or through the support service (USSD-request *111# or similar).

For operators of Ukraine, Kazakhstan or Belarus numbers SMS-For example, for Kyivstar (Ukraine) it is +380674,000,000, and for A1 (Belarus) — +375296000.Clarify the current data on the provider's website!

Alternative ways of setting up SMS-centre

If the standard method through the message settings did not work (for example, the field is blocked or changes are not saved), try one of the alternative options:

• 📱 Through the Engineering Menu: Enter the dial ##4636## → Choose Phone Information → scroll through SMS Center and enter the number. Save the changes and restart the device.
• 🔧 With help. USSD-Commands: For MTS, send SMS textual SC 111, for Beeline — SC The operator will send the current number of the center.
• 📲 Third-party apps: Install a utility from Google Play SMS Center (e.g, SMS It will automatically determine the correct number for your SIM-map.

If none of the methods worked, check if an antivirus or optimizer (such as Xiaomi’s Security or Cleaner) is blocking SMS, and temporarily shutting down these applications can fix the problem.

Typical errors and their solutions

Even after the right setup SMS-You may encounter errors at the center, and let's look at the most common ones and how to fix them:

⚠️ Note: If after the change SMS-the center of the message stopped sending at all, check whether the phone is not on the mode In the plane or Save traffic (can block) SMS). Also make sure that there are enough funds in the account – some operators block the account. SMS zero-balance.

• ❌ "No message sent. Repeat? Reason: wrong number SMS-Solution: check the center number, reset the phone, try sending SMS later.
• ⏳ The reason: weak network signal or operator blocking (for example, if you suspect spam) Solution: move to the area with better coverage or contact operator support.
• 🔄 SMS The reason is that the problem is on the recipient’s side (for example, his/her own). SMS-Solution: Ask the recipient to check their settings or send a message via a messenger (such as WhatsApp).

If the error is repeated systemically, try resetting the network settings (Settings) → The phone. → Resetting settings → Network resetting. This will bring all network settings back to factory settings, including SMS-centre.

Features of settings for two SIM-map

On Xiaomi smartphones with Dual support SIM (For example, Redmi Note 11 Pro or Xiaomi 12T) setup SMS-The center is executed separately for each card. SIM-card operators.

To change SMS-centre-up SIM-map:

1. Open Messages and tap on the profile avatar in the upper right corner.
2. Choose. SIM-The card you want to change your settings for (for example, SIM 2).
3. Go to Settings. → Additionally. → Centre SMS Enter the number for the second operator.

⚠️ Note: If you use eSIM together with a physical SIM-map, setting SMS-The eSIM center may not be available via the standard menu, in which case use the engineering menu (#4636##) or contact the operator for instructions.

Please also note that when sending SMS The default system can use SIM-A card assigned to the calls, to change that:

1. Open messages and create a new message.
2. Put it on the icon. SIM-card near the number field.
3. Select the SIM you want to send.

Frequently asked questions