Why not send messages to the phone Xiaomi: the full guide

When text messages stop coming to Xiaomi’s smartphone, it can be a real problem, especially if you’re waiting for confirmation codes from banks or important notifications from loved ones. Modern Redmi and Poco devices have powerful optimization systems that sometimes perceive standard SMS as spam or background processes that require forced closure, which leads to delays or complete blocking of incoming data.

Owners often find that the problem is not hardware failure, but software conflicts or poor power saving settings. MIUI is known for aggressive memory management, which can interrupt a standard Messages application at the most inopportune time. Understanding the logic of the operating system is the first step to restoring functionality.

In this article, we will discuss in detail all possible causes of failures: from the banal overflow of memory. SIM-We'll look at diagnostic methods that can help you quickly reconnect without going to the service center. It's important to act consistently, eliminating simple errors before moving to complex settings.

Checking the base network coverage and status SIM-map

Before you go into the wilds of Android settings, you need to make sure that you can receive the signal physically. Often users forget to check if you are active. SIM-If the network indicator shows "No connection" or "Emergency Calls Only," then the problem is clearly not the phone's software.

Try to remove the tray with the SIM card and gently wipe the contacts with a soft eraser or a dry wipe. Contact oxidation is a common cause of unstable operation of the communication module, especially if the device is already several years old. After installing the card back, make sure that it sits tightly in the slot and the phone correctly identified the operator.

⚠️ Attention: If during installation SIM-The cards to another phone are coming, but your Xiaomi is not, the problem is localized in the device itself or its settings, not in the card.

It is also worth checking whether the operator has blocked the service of incoming messages due to debt or suspicious activity. USSD-request to unlock the functionality.

• 📶 Make sure the flight mode is on and off again to restart the communication module.
• 💳 Check the balance and status of the room through the operator’s personal account.
• 📍 Are you in a safe reception area (not in a basement or elevator)?
• 🔄 Reboot your smartphone to reset temporary network errors.

Setup the Messages app and manage notifications

The main reason why Xiaomi doesn’t get messages is because of the settings of the app itself, which can limit its background activity as unused, and you need to manually allow the app to run in the background and display notifications.

Go to your phone's settings and find the Apps section. In the list, select the standard Messages app (or the one you use by default). Here we're interested in Notifications -- make sure the switch is activated, and also check the notification categories inside so that none of them are marked as "No Sound" or "Hide."

Special attention should be paid to the AutoRun option. If it is disabled, the system will kill the process of receiving SMS immediately after the screen is turned off.

Another important aspect is the display settings on the locked screen, so if the notifications are hidden, you may not know about the message until you unlock the phone, check if the tick is next to the "Show on the lock screen."

Work with energy saving mode and MIUI optimization

Aggressive battery optimization is a “branded” feature of the MIUI shell, which often becomes an enemy of the normal operation of messengers and SMS. Power saving mode can completely turn off data transmission or block the operation of background services to save charge.

To rule out this factor, go to Battery in the settings. If Power Saving or Ultra mode is activated, switch to Balanced or Performance mode, allowing the system to not restrict the operation of important communication services.

There is also a hidden optimization mechanism that can be turned off through the engineering menu or the developer’s special settings, but first try adding the Messages app to the exceptions: Go to the battery settings, find “Battery consumption by apps,” select “Messages,” and set the background activity limit to “No Limits.”

⚠️ Warning: Disabling all power saving features completely can reduce the battery life of the device, but guarantees instant messaging.

Remember that some memory cleaners and antiviruses installed on the back can conflict with system services. If you use third-party applications to speed up your work, try temporarily disabling them.

Conflicts with third-party apps and Google Messages

Many users prefer to replace the standard app with Google Messages or other analogues from the Play Market. This is a great choice for supporting RCS (chat functions), but this is where conflicts often arise. If you have multiple SMS apps installed, the system may not know which one to use by default.

Check which app is the primary one. To do this, go to Settings → Apps → Application Management → three dots in the corner → Default Apps → SMS. Choose the one you use all the time. If you select the app you have removed or are not using, no messages will come.

In addition, the function RCS (Google’s Rich Communication Services sometimes mishandles operators, causing delays. If the problem has recently appeared, try temporarily disabling Chat Features in the settings of the Google Messages app itself. SMS/MMS.

If you use a third-party app, make sure it is given all the necessary permissions, including access to contacts and phone, without which it may not handle incoming calls and messages properly.

Cache cleanup and reset network settings

Accumulation of temporary files and errors in the cache of the system can cause the communication module to malfunction. If simple reboots do not help, you need to perform a deeper cleanup. This is a secure procedure that will not delete your personal data, photos or contacts.

Go to the storage or application management settings, find the Messages app, and select Clear Cache. Don't confuse it with Clear Everything or Erase Data, as this can delete your correspondence history if it's not synced.

A more radical but effective method is to reset your network settings, which will bring your Wi-Fi, Bluetooth and mobile settings back to factory values, and you'll have to re-enter your Wi-Fi passwords, but that often solves your network login problems.

Settings → Connection and Sharing → Reset Wi-Fi, Mobile Networks and Bluetooth

Once the reset is done, the phone will restart, check if the test message has arrived, and if the problem persists because of a conflict of network protocols, this step should fix it.

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Before resetting your network settings, write down passwords from important Wi-Fi networks so you don’t waste time restoring them.

Actions when blocking by the operator or Blacklist

Sometimes the reason is not because of your phone, but because your number is blacklisted by the operator’s spam filters or on the device itself. Xiaomi has a built-in lock feature that can mistakenly mark short numbers (banks, services) as spam.

Check the Spam or Blocked folder inside the message app. If you see missing messages, whitelist the sender, open the message, click three dots, and select "Do not spam" or "Add to contacts."

Operators can also block content messages or messages from short numbers on your request or automatically if a virus is suspected. Check the settings of the service provider to make sure that you do not prohibit paid or short SMS.

⚠️ Note: If messages don’t come from only certain services (e.g., only from a bank), the problem is almost certainly on the sender side or in spam filters rather than the phone.

Updating firmware and system components

Outdated software may contain bugs that affect the radio module. Xiaomi regularly releases security updates and patches for MIUI, which often fix such bugs.

Check for updates in the About Phone section. If a new version is available, it is advisable to install it by backing up the data beforehand, sometimes even re-installing the current version through the recovery menu if an air update is not available.

Critically, if the problem started right after the firmware update, there may be a bug in the new version, so you should search the forums for your particular model and version of MIUI, you may need to roll back on the previous stable version.

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Regular system updates are the best way to avoid software conflicts with network modules.

Frequently Asked Questions (FAQ)