SMS does not come to Xiaomi Redmi: troubleshooting

When a long-awaited message from a bank or confirmation code does not appear on a smartphone screen, it can be taken by surprise at the most inopportune moment. For owners of Xiaomi Redmi devices, this problem sometimes becomes critical, especially when it comes to two-factor authentication or urgent notifications. Owners often find incoming messages simply lost in transit or delayed indefinitely, causing confusion and searching for reasons.

The reasons for the lack of incoming SMS can range from a banal lack of funds on the account to complex software conflicts in the shell of MIUI. Sometimes the failure occurs on the side of the operator, and sometimes the culprit is aggressive optimization of the Android system, which “sleeps” the application of messages to save battery power. Understanding the source of the problem is the first step to its successful solution without contacting the service center.

In this detailed guide, we will look at all possible scenarios that cause Redmi Note or other models to stop receiving text messages. SIM-maps, antivirus and system restrictions that often block the normal operation of standard communication services.

Basic diagnosis and verification SIM-map

Before you get into the complex system settings, you need to rule out basic physical and operator problems. Often, the cause is poor contact of the chip with the phone or a temporary failure in the cell towers. Simple actions can instantly return functionality to your device, so do not neglect them.

First, check the status SIM-If the phone shows "No network" or an icon SIM-If the cards are crossed out, it's obviously hardware or online logging, try to remove the tray, wipe the contacts with a pin and put the card back in, making sure it's flat. It is also worth checking whether the service of SMS transmission on the operator’s side is active by calling technical support.

• 📱 Reboot the device is a classic method that resets temporary errors of the communication module and forcibly re-registers the phone in the operator’s network.
• 💳 Check balance – make sure there are funds in the account if you have a fee with paid incoming (relevant in roaming) or if memory is overcrowded SIM-map.
• ✈️ Turn on and off the Flight mode – this will force the radio module to restart and make the phone re-find the nearest base station.

Particular attention should be paid to the overflowing memory. SIM-Old cards can store a limited number of messages, and when the limit is exhausted, new ones just don't come. SMS Directly from the card (not from the phone’s memory) can fix the problem instantly.

⚠️ Note: If you are using Dual SIM, Make sure that the correct SIM card is selected for receiving messages in the settings, especially if one of the cards is blocked or does not have coverage in the current zone.

Sometimes a simple reshuffle helps. SIM-Slots in slots. SIM 1 often has priority for voice and SMS by default in some firmware versions. If you have two SIM cards, try swapping them and see if the message appears.

Network settings and preferred network type

Modern Xiaomi smartphones support many communication standards, including 2G, 3G, 4G and 5G. However, not all operators and not all regions ensure stable SMS operation on the latest generation networks, especially if VoLTE or RCS technology is used. The wrong type of network can lead to the phone hanging in 4G/5G, but the channel for short text messages (which often uses 2G/3G protocols) is not available.

To fix this problem, you need to manually change the preferred network type, which will force the modem to switch to a more stable, albeit less fast, standard, which often restores delivery of SMS, and you can do this through the settings menu, where the engineering parameters of the radio module are hidden.

To get into the network selection menu, open the dialer and enter the special code ##4636##. From the menu that opens, select Phone Information and find "Configure preferred network type." Here, be careful: choosing the wrong setting can temporarily deprive the phone of communication.

⚠️ Note: Do not choose the options «LTE Only" or «5G Only" if your carrier does not support SMS transmission solely through these standards — «GSM/WCDMA/LTE (auto connect)».

Once you change the network type, the phone can lose the signal for a few seconds, wait for the 4G or H+ icon to appear, and then ask someone to send you a test message, and if the text came, then the problem was the compatibility of the communication standards in your location.

Battery optimization and application operation Messages

One of the most common reasons why SMSes don't come to Redmi is aggressive energy saving: MIUI is known for its tight control of background processes, which often "kills" the Messages app immediately after you exit from it. As a result, while the app sleeps, new messages can't be processed and displayed on the screen.

To allow an application to run in the background without restrictions, you need to change the battery settings, which will make it clear to the system that Messages is a critical service that cannot be stopped to save a few milliamps.

Go to Settings → Apps → All apps, find Messages (or your third-party app, like Google Messages). Go to Saving Charge and select No Limits. Also remember to enable auto-start for this app so that it starts immediately after your phone is turned on.

• 🔋 Turn off Smart Energy Savings in the Battery section if it is active, as it can block network activity at night.
• 🔔 Check notifications – make sure all types of notifications are included in the Messages app settings and the “Important” tick is ticked».
• 🧹 Clear the cache – in the same app menu, click Memory and select Clear the cache, but not Clear Everything, so as not to delete your correspondence history.

If you use third-party launchers or memory cleanup applications, they can also interfere with system services. Add the Messages app to your antivirus or cliner white list so that the system doesn't delete it from RAM.

Conflicts with spam blocker and third-party applications

In the shell. MIUI It has a powerful antispam tool built in, which automatically filters incoming calls and messages, sometimes its algorithms are too aggressive and flag legitimate messages (such as from delivery services or banks) as spam, hiding them from the user. SMS-Managers can create conflict, as Android allows only one application to be the default SMS handler.

Check the Spam or Blocked folder in the message app. If you find lost messages there, whitelist the sender, open the dialog, click three dots in the corner, and select "Whitelist" or "Do not spam."

Also check which app is installed as the main one for SMS. Go to Settings → Applications → Application Management → Three dots (menu) → Default apps → SMS. Make sure that the application you are using is selected there. If you select an application that you have removed or are not using, messages will not come.

If you've recently installed any applications to block calls or identify numbers, remove them for verification. They can intercept incoming data packets and not transfer them to the main application.

Resetting network settings and flashing the communication module

When software failures accumulate, the configuration of network modules can be disrupted, in which case resetting the network settings helps. It is important to understand that this step will not delete your personal files, photos or contacts, but it will erase stored Wi-Fi passwords and Bluetooth pairs, so be prepared to re-enter them.

To perform the reset, go to Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. Click Reset button at the bottom of the screen and confirm the action with a password code or fingerprint. Once rebooted, the phone will search for the network as a new device.

In some cases, especially after the firmware update MIUI, You may need to update the operator's configuration files, which is usually automatic, but you can check for updates manually through the settings menu. SIM-map.

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Before resetting your network settings, write down or take pictures of important APN settings (Access Points) if you are using the corporate Internet or specific operator settings.

If even after the reset, the problem persists, the firmware profile itself may be damaged, in which case, reset all settings to factory settings (Settings → Phone → Reset → Erase all data), but this is an extreme measure requiring a full data backup.

Technical problems and contact with the service

If software methods didn't help, it's worth considering a hardware malfunction. The communication module in Xiaomi Redmi smartphones is a complex component that can fail due to falls, moisture or factory defects. Symptoms of hardware breakdown include not only the lack of SMS, but also constant network search, heating the bottom of the phone and fast battery discharge.

Check if mobile internet and voice are working, and if calls are made and only senders (like short numbers) are not texting, the problem is not hardware, but operator filtering, and if the phone doesn't see the network at all or constantly writes "Emergency Calls Only," that's a cause for concern.

• 🔍 Check the antenna contact – if the phone was disassembled earlier, the antenna plume could have left.
• 🌡️ Control the temperature – overheating of the processor or modem can cause the radio module to shut down.
• 📞 Test call – call your number from another phone; if the beeps go but the phone doesn’t ring, the problem is deeper than just texting.

⚠️ Warning: If the phone has fallen or been in contact with water, self-repair of the communication module is not recommended.

In rare cases, the problem may be related to a specific firmware version. Check for system updates in the About Phone menu. Sometimes Xiaomi releases patches that correct errors in the network of specific operators.

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If nothing helps, try inserting yours. SIM-If you don't get text messages, you have a problem with the operator, if you do, your smartphone is broken.

Frequently Asked Questions (FAQ)