Why not send messages on Xiaomi smartphones and how to fix it

Problem with sending SMS Xiaomi smartphones are one of the most common complaints users have, you click "Send" and the message is hanging with an exclamation point or disappearing without a trace. SMS It's a few hours late, and sometimes it doesn't get it at all, and it can be caused by the settings of the phone itself, by the operator, by the firmware. MIUI or even hardware malfunctions.

In this article, we will discuss all the possible reasons why Redmi is a good person, POCO or Mi stop sending messages, from trivial errors in settings to hidden failures in the modem» MIUI, which often become a source of problems: for example, automatic battery optimization, blocking the background operation of the Messages application, or conflicts with double-digits. SIM-You'll also find step-by-step instructions for diagnosing and solving the problem, including hidden settings and commands for the engineering menu.

If you are faced with the fact that SMS They do not only go to one person, to a specific SIM-If you're looking at a map or a firmware update, you have separate sections for each case, and for those who prefer instant messengers, we'll compare reliability. SMS With alternatives like WhatsApp or Telegram, we explain why you should go back to good old text messages.

1. Checking the basic settings: SIM-map, network and flight mode

Before digging deep into the settings MIUI, Make sure the problem isn't on the surface. Start by checking the physical condition. SIM-Take it out of the tray and check for contact damage, even a microscopic scratch can cause the network to malfunction. SIM-The card is inserted into the adapter (e.g. nano-SIM in micro-SIM), try to do without it – adapters often become a source of poor contact.

Next, check the network mode. In some regions, operators are turning off support. 2G (GSM), historically SMS, leaving only 3G/4G. If your Xiaomi is forced to configure only 4G (LTE), The messages may not be sent to change that:

1. Go to Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-card (if there are several).
3. Click Network Type and install 3G/4G (car 2G/3G/4G (motor-car).

Also make sure that the flight mode is turned off - sometimes it is activated accidentally (for example, through the Quick Settings panel). SIM-card of another operator that may conflict with the main.

⚠️ Note: Some Xiaomi models (e.g. Redmi Note 10 Pro) POCO X3 Pro) when you activate flight mode, not only does the communication turn off, but the background work of applications, including Messages. After you turn off flight mode, restart your phone to restore all processes.

Double-sided conflicts SIM-Map: How to Choose the Right One

If your Xiaomi supports two of your SIM-The problem with the cards is that the roles are not properly assigned. MIUI single-handed SIM-a card for calls and another for mobile Internet, but settings SMS They're often confused:

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose. SIM-map from which no messages are sent.
3. Check the item Sending SMS — There's got to be a checkmark.

If the tick is ticked, but the messages still do not go away, try to force this one to be assigned. SIM-map SMS:

• 📱 Open the Messages app and click on the three dots in the upper right corner.
• ⚙️ Select Settings → Settings SIM-map.
• 🔄 Set the right one up. SIM-map as default for the SMS.

On some firmware MIUI (particularly POCO) There is a bug: if you insert the second SIM-card after first setting up the phone, the system may not recognize it as «SMS-In this case, only a complete reset of the network settings will help:

Settings → About phone → Resetting settings → Resetting network settings

⚠️ Note: After resetting the network, you will have to re-enter Wi-Fi passwords and configure APN. Keep them in your notebook in advance!

3. Lockdown SMS Operator: How to check and what to do

Telecom operators sometimes block the shipment SMS For reasons ranging from suspected spam to technical work to see if it's your situation:

• 📞 Try sending it. SMS to a short operator number (e.g. *100# for MTS or *111# for Beeline) If the message goes away, the operator is not the problem.
• 🔄 Restart your phone and try sending it. SMS Again – sometimes operators temporarily restrict services due to network congestion.
• 💳 Check the balance: on some tariffs (especially unlimited ones) SMS may be limited or limited.

If SMS They don't just go to other carriers, maybe your operator has a roaming problem. SMS roaming to fight fraud:

1. Call in support of the operator (numbers: MTS - 0890, Beeline - 0611, MegaFon - 0500, Tele2 - 611).
2. Ask if there are any restrictions on shipping. SMS for your room.
3. If the blockage is confirmed, ask to remove it - sometimes it can be done through the USSD-command, for example, *111*123# Beeline).

A special case is virtual operators (like Yota, Tinkoff Mobile, or SberMobile), which often rent networks from major operators, and SMS They can get lost because of incorrect routing. If you're using a virtual operator, try it:

• 🔧 Manually prescribe APN-settings (can be found on the operator's website).
• 📶 Forced to choose the network of the main operator (for example, for Tinkoff Mobile it is Tele2).

4.Firmware failures MIUI: updates, cache and hidden settings

Firmware MIUI It's known for its features, which sometimes break basic functionality. SMS It came after the update, and it's probably the software's fault:

1. Go to Settings → Applications → Application Management.
2. Find the Messages app and select Clear Cache.
3. Do the same for the Telephony Service and the Service. SIM-map.

If that doesn’t help, try resetting the Messages app settings**:

• 🔧 In the same application management menu, select Reset settings for “Messages».
• 🔄 After resetting, restart your phone.

On some versions MIUI (Especially 12-14) there is a bug with the background of the applications. SMS, if the Messages app is not added to the battery optimization exceptions:

1. Go to Settings → Battery and Performance → Battery Consumption Management by Apps.
2. Find Messages and install Without Limits.
3. Do the same for the Telephone Service.

If the problem occurs after a major update MIUI (For example, 13 to 14, the modem settings may have been lost, and then resetting through the engineering menu will help:

Enter the dialer: ##4636###


Go to the section "Phone Information"




Select Network Selection → Disconnect Radio (wait 10 seconds) → Turn on Radio

⚠️ Note: Some Xiaomi models (e.g. Redmi Note 9 Pro) may lose the network after resetting the radio module. If this happens, restart the phone in recovery mode (click Power). + Volume up and select Reboot to Bootloader.

Clear the cache of the "Messages" application

Reset the settings of the "Messages" application

Add "Messages" to battery exclusions

Check out MIUI updates

Reset the radio module via ##4636###

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5. Hardware problems: modem, antenna and repair

If none of the software methods worked, the problem could be hardware, and it's often the fault of:

• 📡 Damaged antenna (especially after falls or moisture).
• 🔌 Faulty modem (chip responsible for communication).
• 🔋 A bloated battery that presses on the tray SIM-map.

To diagnose a hardware malfunction:

1. Check the signal level: if it is constantly at a minimum (1-2 divisions) even in the area of good coverage, the antenna may be damaged.
2. Try another one. SIM-map if with it SMS They are going, the problem is yours. SIM or her slot.
3. Check the tray. SIM-cards: bent contacts or corrosion - a sign of moisture.

On Xiaomi models with a metal body (such as the Mi 9 or Mi 10), the antennas are located on the sides of the frame. RF-The cable that connects the antenna to the modem, and then the only thing that's going to help is repair.

Another sign of hardware problems — SMS They don't send, but the calls are working. IMS-module (responsible for data transmission over the network) 4G, including SMS). This can only be diagnosed in the service center with the help of special equipment.

⚠️ Warning: If you suspect a hardware malfunction, don't try to disassemble the phone yourself - on most Xiaomi models, antennas are glued to the body and are easily damaged.

💡

If your phone falls or gets wet, dry it in rice or silica gel for at least 24 hours before visiting the service.

Alternatives SMS: When to switch to messengers

If the struggle SMS You're tired of it, maybe you should consider alternatives, and today's messaging apps like WhatsApp, Telegram, or Viber offer more reliable delivery, read notifications, and the ability to send media, but they also have downsides:

• 🔒 Internet Linkage: Without Mobile Data or Wi-Fi, Messages Will Not Be Sendable.
• 📱 App Dependence: If the messenger “falls”, you will be left without communication.
• 🔍 Privacy: Not all messengers encrypt messages by default.

If you do decide to switch to instant messengers, here are the 3 most reliable options for Xiaomi:

However, there are cases where SMS indispensable:

• 🏦 Bank Notifications (Confirmation Codes, Transaction Alerts).
• 🚗 Taxi/Delivery Services (Many of the Services) SMS driver-link).
• 🆘 Emergency services (in some countries) SMS They work without a network).

If you still want to give up SMS, But be afraid to miss important notifications, set up a redirect SMS email (some operators support this feature) or use specialized applications like Pulse SMS, Synchronize messages between devices.

💡

Even if you use messengers, do not turn off SMS Many services (banks, public services) are tied to them.

7. Hidden settings and engineering menu: for advanced users

If standard methods don’t work, you can try hidden Xiaomi settings that aren’t accessible through the normal interface. SMS The system is blocked due to incorrect parameters of Radio Interface Layer (RIL). To throw them off:

Enter the dialer: ##7465625###


This will open the "RIL Dump" menu.




Select "Reset RIL" and confirm

Another useful team is to check the status SIM-map:

Enter ##4636##


Go to "Phone Information"




Scroll down to the SIM Status block.




Check the parameters:




- SIM State should be READY.




- "Mobile Network State" must be "CONNECTED"

If in status SIM-card ABSENT or ERROR, The problem may be in the contacts of the tray or the SIM-If the Mobile Network State shows the map DISCONNECTED, Try to manually register on the network:

From the engineering menu (#4636##) select:


"Phone Information" → "Run Ping Test"




If the ping doesn't go away, hit "Turn Off Radio" → Wait 30 seconds → "Turn On Radio"

On some firmware MIUI (particularly custom) SMS They may not be able to go because of incorrect APN-settings, even if the mobile Internet is working. APN:

1. Go to Settings. → SIM-maps and mobile networks → Access points (APN).
2. Click on the three dots in the top right corner and select Reset to default values.
3. If it doesn’t work, add it manually. APN Your operator (settings can be found on your website).

⚠️ Warning: Changing the settings in the engineering menu may cause network loss or failure IMEI. If you are not sure about your actions, make a backup copy through Settings. → Additionally. → Backup and reset.

FAQ: Frequent questions about SMS issues on Xiaomi