Where is the SMS center on Xiaomi: the complete guide

The problem with sending messages on Xiaomi smartphones often takes you by surprise: you type text, press the send button, but the message freezes in the status of “Send” or instantly returns with a delivery error. In most cases, the user immediately sins for poor communication or problems on the operator’s side, forgetting about the important system parameter – the SMS number (SMSC), which is the recipient receives your message from the phone and redirects it to the recipient, working as a mail sorting center.

On Xiaomi, Redmi and POCO devices, finding this parameter can become a real quest, as software manufacturers MIUI and HyperOS often hide access to it from the eyes of the average user. Standard settings menus may not contain a direct link to editing this number, which is puzzling. However, knowing the right paths and hidden codes, you can quickly diagnose and fix the situation.

In this article, we will take a look at exactly where the SMS number is hiding in your smartphone interface, how to check it through the engineering menu, and what to do if standard methods don’t work. You will learn to distinguish between software failures and real network configuration errors, which will save you time and nerves when communicating with the operator’s technical support.

What is the SMS Center number and why is it needed

The Short Message Service Center (SMSC) number is a unique phone number assigned to each cell operator. When you send a message, your phone doesn't send it directly to the recipient's device, but first sends it to the short message service center, where the message is sorted, verified by the destination, and, if it's available, delivered to its destination. Without the correct center number, the phone simply doesn't know where to send the data for further routing.

In modern smartphones, this number is usually written automatically when you first install it. SIM-The operator sends out special service packages that customize Android without user involvement, but sometimes there are firmware conflicts in the Xiaomi ecosystem, especially when flashing from the global version to Chinese or when using customized devices. ROM. In such cases, the automatic setting may not work and the center number will remain empty or be replaced by a default value that does not match your region.

If the SMS number is incorrect, you will not be able to send messages, although the incoming ones will come normally, a classic symptom that is often confused with operator lock or lack of balance. It is important to understand that incoming messages are processed differently and do not require active interaction with the sending center at the time of reception, so their presence does not guarantee the correct settings of outgoing communication.

How to find the number of the SMS center through the engineering menu

The most reliable way to check and change network settings on Xiaomi is to use the engineering menu, which is a hidden part of the system, designed to test equipment and deeply configure communication parameters. USSD-code that runs on most MediaTek and Qualcomm processors used in Redmi smartphones and POCO.

To enter the menu, you need to open the Phone app and dial ##4636#. Immediately after entering the last digit, the hidden Verification menu will open. Here you are interested in the Phone Information section. Depending on the version of MIUI, the interface may differ, but the key elements remain the same.

Inside the Phone Information section, scroll down to the Settings block. SMS» or «SMSC». Here you'll see a field with the current center number. If the field is empty or contains incorrect data, you can change it. Please note that the number format should be international, starting with a plus, for example, +79160000000. To enter, you need to click the “Update” or “Install” button» (Set/Update) post-editing.

• 📱 Open the dialer and dial ##4636## to enter the test mode.
• 🔍 Select “Phone Information” and find the block. SMSC.
• ✏️ Enter the correct center number in the international format and click "Update».
• 🔄 Restart the device to make the changes effective.

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Before you change any settings in the engineering menu, write down or take a picture of the original values, which will allow you to quickly return the settings back if the network disappears after the changes or other communication problems arise.

Search for settings in the standard interface MIUI and HyperOS

Users who don’t want to get into the wilderness of engineering code can try to find settings through the standard interface. However, the path to them on Xiaomi is not obvious and often changes with shell updates. In the classic Google Messages app or standard MIUI Messages, the center settings are usually hidden in the depth of the menu.

To try to find a setting, open the message app, click three dots in the corner of the screen and select Settings. Next, look for the "Additional" or "SMS" section. Some versions of the firmware may have a "Message Center" option. If you see a number there, it can be edited. If there is no one, then your version of HyperOS or MIUI hides this option, and you will have to use codes or third-party applications.

It’s worth noting that newer versions of Android and Xiaomi shells tend to completely hide these settings from the user. The logic behind the developers is simple: automatic settings work 99% of the time, and manual intervention is more likely to hurt than help.

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In modern versions MIUI HyperOS and direct access to SMS center settings via a regular menu are often blocked by developers, so the use of the SMS center is not possible. USSD-Codes or engineering menus are the only standard solution.

Use of third-party applications to manage SMSC

If standard methods fail, specialized applications from the Google Play store come to the rescue. Programs like SMSC Setter or Force LTE Only (4G/5G) allow you to access hidden Android APIs and manage network settings, and these applications are especially useful when the engineering menu is not available or hidden by the manufacturer.

The way these utilities work is simple: once installed, you open the application, and it automatically reads the current SMS number from the phone's memory. If the number is wrong, you can enter the correct one from your operator's site and press the installation button. The application will send a system request to change the parameter, which often bypasses the interface constraints.

It's important to keep security in mind: when you give an application access to network settings, you trust it with important features. Only use proven programs with high ratings and a lot of downloads. Don't install dubious utilities that require suspicious permissions that are not related to telephony.

Table of SMS-centers numbers of popular operators

To work properly, you need to know the exact number of your operator's center, which is unique for each region and operator. Below is a table with the current numbers for the main operators operating in Russia and CIS countries. If your operator is not on the list, information is easily found on the official website or in your personal account.

Note that the format of the number input is critical. Some phones require a plus format at the beginning (+7...), others only accept numbers. Xiaomi's engineering menu often requires a full international format. A mistake in even one digit will cause messages to stop being sent again.

Common Errors and How to Resolve Them

Even with a number entered correctly, errors can occur, and often the problem lies not in the room itself, but in the format. SIM-maps or network mode conflicts, such as when the phone is trying to run 5G, a in your area, coverage is unstable, data services may fail. 4G» or «3G/2G» Often helps to restore the sending of messages.

Another common mistake is having two SIM-It often happens on Xiaomi that the default SMS is a SIM that has no tariff or run out of money, even though the center number is correctly spelled out. SIM-The card is selected for sending by default, and try temporarily retrieving the second card for diagnosis.

⚠️ Note: If the SMS number is changed, don’t rush to drop the phone before the factory settings. First, try sending a message to the operator’s service number (for example, a balance request). If it goes away, the problem may be in the recipient’s contact or blocking with spam filters.

Also worth mentioning is the problem with messaging apps, where some users confuse texting and texting over the Internet (RCS, If you have chat enabled in Google Messages, your phone may be trying to send a message over the Internet rather than over a cellular network. Disabling this feature in the app settings will help you understand exactly what is causing the crash.

Frequently Asked Questions (FAQ)