How to change SMS-Xiaomi center: 3 working methods (including hidden settings)

If you have Xiaomi, Redmi or POCO stopped sending SMS or messages leave, but do not reach the addressee, the problem may lie in incorrect settings SMS-This parameter is responsible for routing text messages through the carrier, and its failure is one of the most common causes of the "disappearance" of SMS. SMS-The center is hidden deep in the system files, on Xiaomi they can be changed in several ways – both through the standard menu and using engineering codes.

In this article, we will discuss all the current methods of change. SMS-center on Xiaomi smartphones (including models on the MIUI 14/15 and HyperOS), explain why messages may not be sent even with the right settings, and give a checklist to diagnose the problem «SMS-center does not respond, the following instructions will help return the performance of the messenger.

What is it? SMS-The center and why you need to change it

SMS-centre SMSC — Short Message Service Center is the mobile operator server that all your text messages go through. SMS, It hits first. SMSC, If the center number is incorrect or the operator's server is temporarily unavailable, the messages either freeze in the "Send" status or disappear altogether without notification of the error.

Reasons why a change may be required SMS-center:

• 📱 Resetting the settings to the factory - after it SMSC It is often reset to a standard number, which may not be relevant to your operator.
• 🌍 Roaming – when traveling abroad, local operators can block messages with “alien» SMS-centre-piece.
• 🔄 Shift. SIM-The new operator uses a different card SMSC, The phone is still sending SMS old address.
• 🛠️ Update firmware - sometimes after update MIUI or HyperOS network settings reset.

It is important to understand that several numbers can be saved on one smartphone. SMS-centers (one for each of them) SIM-If you have a two-sim Redmi Note 12 or POCO X5, I'll have to adjust. SMSC for each card separately.

⚠️ Attention: Don't confuse SMS-access-point APN (These are different parameters, and the change is APN It will not affect the sending of text messages.

Method 1: Change of change SMS-Center through standard settings MIUI/HyperOS

The easiest method is to use the built-in MIUI or HyperOS tools. It is suitable for most Xiaomi models, including the Redmi 13C, POCO F5, Xiaomi 14 and older Android 11-14 devices.

Instructions:

1. Open the Messages app (the envelope icon).
2. Slip on the three dots in the upper right corner and select Settings.
3. Go to the Additional section (or Advanced Settings on HyperOS).
4. Click SMS Settings → SMS Center.
5. Enter the number. SMS-your operator's center (see table below) and save the changes.

If the SMS Center item is not on the menu, then your version of MIUI is hiding it. In this case, use Method 2 or Method 3.

After making changes, be sure to restart the phone. This is necessary to apply the new settings at the modem level.

Method 2: Use the engineering menu (#4636##)

If the standard method didn’t work, you can change SMSCs through a hidden engineering menu, which is universal for all Xiaomi smartphones, but requires caution – wrong actions can disrupt the network.

Step-by-step:

1. Open the Phone app and type in the combination: ##4636## Some models (e.g. POCO M6 Pro) may require you to enter: ##36446337###
2. In the menu that opens, select Phone Information (or Phone Information).
3. Scroll down to the SMSC block and click Update.
4. In the input field, enter the number SMS-the center of your operator (see table above) and click Update.

If the SMSC field is inactive or not, your firmware will block editing through the engineering menu, and Method 3 will help.

⚠️ Attention: On some firmware MIUI For Xiaomi (especially on models for China), the engineering menu can be disabled. If nothing happens after entering the code, try using the app. MTK Engineering Mode (for MediaTek processors) or Qualcomm Service Mode (for Snapdragon).

Method 3: Applications for Change SMS-center (without root)

If the first two methods didn’t work, you can use third-party utilities, and we tested them on Xiaomi 13T, Redmi Note 11 and POCO F4 — all of the apps in the list below work without root rights.

Top.-3 tested applications:

• 📲 SMS Center (Play Market) is a simple interface that supports dual-symbol phones.
• 🔧 SMSC Set – allows you to save several profiles SMSC different SIM-It's running Android 10.+.
• 🛠️ Network Signal Guru – In addition to SMSC It shows signal strength, cell and operator information, and it's good for diagnosing network problems.

How to use (for example, SMS Center):

1. Download and install the app from the Play Market.
2. Run it and select it. SIM-card (if the phone is two-sim phone).
3. In the SMSC Number field, enter your operator’s center number.
4. Press Set SMSC and confirm the action.
5. Reboot the phone.

If the application fails to update SMSC, it means:

• 🔒 Your operator is blocking the change. SMSC (It is important for some virtual operators).
• 📵 SIM-The card does not support the function (found on very old cards).
• 🛡️ Firmware MIUI restricts access to modem settings (solved by obtaining root).

💡

If you still don't send messages after you change SMSC, check if 4G/LTE Only is enabled in your network settings. Some operators require you to switch to 3G or 2G for SMS to work properly.

What to do if SMS-center

If none of these things work, the problem may be deeper than it seems. Here's a list of possible causes and solutions:

If you are sure that the problem is SMS-The center, but it can not be changed, there are two options:

1. Contacting the operator - sometimes SMSC profiled SIM-cards, and it can be changed only through support (call 0890 for Beeline, 0500 for MTS, etc.).
2. Use alternative messengers – WhatsApp, Telegram or Viber are not dependent on SMSC, but require the Internet.

Additional settings for stable operation of SMS

Even after a successful change SMS-The message center may be unstable. To avoid problems, check the following parameters:

• 📶 Network Mode: Go to Settings → SIM-maps and mobile networks → Network mode and select 3G (or 2G/3G/4G). Some operators are not well handled SMS Only in mode 4G.
• 🔄 Auto Network Selection: Disable manual network selection if it has been activated.Path:Settings → Mobile network → Choice of network → Automatically.
• 📱 Message settings: In the Messages app, check: Is the "Send How" mode disabled MMS» (can block SMS). Is the “Report Delivery” option enabled (helps track whether a message has reached).
• 🔋 Energy saving: Add the Messages app to the battery optimization exception list (Settings) → Battery → Optimizing the battery).

If you travel frequently, it makes sense to keep the rooms. SMS-Main operators' centers in the notes. For example, for Xiaomi in roaming, manual input may be required SMSC local provider.

Frequent Mistakes and How to Avoid Them

When changing SMS-And the users of the center often make the same mistakes:

• ❌ Incorrect number format — SMSC It should be in an international format (for example, +79,160,000, not 89,160,000).
• ❌ Ignoring the reboot – without it, changes may not take effect.
• ❌ Attempting to change SMSC blocked SIM-card if the card requires PUK-code, unlock it first.
• ❌ Using outdated engineering codes – on new Xiaomi (e.g. Xiaomi 14 Ultra) may not work ##4636##. Try alternative combinations: ##36446337## for Qualcomm processors ##3644638### for MediaTek

If, after all the manipulations, SMS is still not sent, the problem may be:

• 📵 Hardware modem failure (solved by flashing or repair).
• 📡 Bad signal network (check signal level in the engineering menu).
• 🔒 Blocking by the operator (for example, for debts or suspicious activity).

FAQ: Answers to Frequent Questions