The situation when SMS messages stops receiving messages on your smartphone causes panic, especially if you are waiting for a confirmation code from the bank or an important notification from a loved one. The problem of lack of incoming messages on devices with an operating system Android can be caused by many factors: from banal battery saving to serious failures in the operation of the telecom operator.
Most often, the reason lies not in hardware failure, but in a software conflict or incorrect configuration of network parameters. You will have to consistently check the status of the SIM card, the operation of system applications and the relevance of the software. In this article, we will analyze in detail all possible scenarios due to which Android ignores incoming traffic, and we will offer step-by-step guide for restoring functionality.
Before moving on to complex manipulations, make sure that there are funds on the balance of your number and the limit of incoming messages has not been exhausted (which is rare, but it happens during blocking). Sometimes the problem is solved by simply rebooting the device, which clears temporary modem errors.
Basic network and SIM card diagnostics
The first step should always be to check the physical condition of the SIM card and the signal level. If the network indicator shows no coverage or a crossed out antenna icon, the problem is clearly on the side of the operator or the antenna module. Try removing the SIM card tray, wipe the contacts with a soft, lint-free cloth and install it back, making sure that it fits tightly.
Particular attention should be paid to the network operating mode. Sometimes the phone gets stuck in 2G/EDGEmode, where message delivery may be unstable or completely stopped due to planned shutdowns of old stations by operators. Go to settings and force select the mode LTE/4G or 5Gif your tariff and area support it.
Also check if Airplane mode is accidentally turned on. This function completely disables all radio modules, making reception SMS impossible. If the airplane icon is active in the notification shade, turn it off and wait 10-15 seconds until the operator icons appear.
⚠️ Attention: If you use two SIM cards, make sure that in the message settings the card on which you expect to receive SMS is selected. Users often get confused in linking numbers to applications.
In cases where the SIM card is old and has a non-standard size (cut out of a large card with scissors), it may not connect well with modern slots. Replacing a SIM card in an operator's communication store often solves the problem of "floating" reception.
Problems with the messaging application
Standard application Google Messages or third-party clients like Textra may not work correctly due to accumulated cache or errors in the database. If the application interface freezes or notifications do not appear, the first thing you need to do is clear the app's temporary files.
Go to the section Settings → Applications → Messages and select “Storage”. Click the Clear Cache button. This is a safe operation that will not delete your correspondence, but will reset temporary data that could cause a failure in processing incoming packets.
If clearing the cache did not help, try deleting application updates to the factory version. Sometimes new versions of software contain bugs that conflict with your firmware. After the rollback, check the operation of the SMS, and then, if necessary, update the application again via Google Play.
☑️ Application diagnostics
It is important to make sure that the SMS application is set as the default app to work with text messages. If you have multiple instant messengers installed, the system may route incoming data to an inactive application that does not show notifications.
Power saving mode settings
Aggressive power saving settings are one of the most common reasons why Android not delivers notifications on time. The system can forcefully “put to sleep” the background processes of the messages application to save battery, thereby blocking the receipt of data.
You need to go to the battery settings and find a list of optimized applications. Find your SMS application in the list and select the “Do not optimize” or “No restrictions” option. This will allow the app to run in the background at all times, even when the screen is turned off.
Also check if the Super Power Saver or Sleep Mode is enabled. In these modes, the phone turns off most background syncing, leaving only calls and basic functions active. Disabling these modes often restores the notification flow instantly.
⚠️ Attention: The names of menu items may differ in different shells (MIUI, OneUI, ColorOS). Look for sections related to “Autostart” or “Activity Control” and allow the messages application to run in the background.
Users often ignore this item, believing that SMS is a system function that cannot be stopped. However, in modern versions Android even system services are subject to energy saving rules in order to extend battery life.
If you have a Xiaomi or Redmi phone, be sure to go to the "Security" application → Permissions → Autorun and turn on the checkbox next to the Messages application.
Blocking spam and blacklists
Built-in spam filters and blocking unknown numbers features can work too hard, sending important messages to a hidden folder or deleting them without notice. Check your messaging app's blocking settings.
Go to the app's settings menu (usually three dots in the corner) and look for the "Anti-spam" or "Number blocking" section. Make sure that the option to block all messages from unknown senders is not activated there if you are waiting for a code from a service that uses short codes.
Also check your personal blacklist in your phone settings. You may have accidentally added the sender's number or a whole range of operator numbers there. Removing a number from the blacklist will immediately resume delivery of messages.
| Blocking type | Where to look for the setting | Possible cause of failure |
|---|---|---|
| System blacklist | Phone settings → Blocking | Manual addition of a number by the user |
| Google spam filter | Messages → Settings → Anti-spam | False positives of algorithms |
| Blocking unknown | Application settings → Blocked | The “Contacts only” option is activated |
| Third-party antivirus | Antivirus application → Antispam | Strong filtering rules |
If you use third-party antivirus or cleaning applications, check their antispam settings. They often have their own databases that can mistakenly classify legitimate emails as malicious.
How to recover a deleted spam message?
In the Google Messages app, click on the three dots in the corner, select “Spam and blocked.” Messages filtered by the system are stored there, which can be returned to the main chat with one touch.
Failures in the operator and SMS-Center services
Sometimes the problem is not in the phone, but in the settings of the message center (SMS-Center) on the operator's side. If the message center number is confused or entered incorrectly, the phone simply does not know where to send delivery requests, and incoming messages may also be lost.
The message center number is usually configured automatically when installing a SIM card, but after resetting the settings or flashing it, it may disappear. You can find out the correct number on the official website of your operator or by calling the support service.
To check and change the number, go to the message application settings (advanced settings) and find the “Service center number” item. If the field is empty or contains strange numbers, enter the current number of your operator.
Examples of SMS-Center numbers (subject to change):MTS: +79168990000
Beeline: +79037000000
Megafon: +79260000000
Tele2: +79220000000
It is also worth checking whether you have activated the Caller ID service or special tariff options that block newsletters. Some tariffs “for children” or corporate packages have restrictions on recibing SMS from short numbers.
⚠️ Attention: Tariff plans and technical parameters of operators may change. Always check the current service center number and list of blocking services in your operator’s personal account or with the support service.
System errors and resetting network settings
If none of the previous methods helped, it is possible that deep network protocol errors have accumulated in the system. In this case, the solution is to reset the network settings to factory settings.
This operation will delete all saved access points APN, Wi-Fi passwords and Bluetooth settings, but will return the network modules to their original state. Go to Settings → System → Reset settings → Reset Wi-Fi, mobile data and Bluetooth settings.
After the reboot, the phone will re-register in the operator’s network and load the correct settings. This often solves problems associated with incorrect switching between cell towers.
Resetting network settings is a secure procedure that does not affect your personal files, photos or contacts, but requires re-entering Wi-Fi passwords.
In extreme cases, when the problem appeared after a firmware update, you may need to completely reset the device (Wipe Data). Before doing this, be sure to make a backup copy of all important data, as the phone will be completely wiped.
Frequently asked questions (FAQ)
Why do SMS arrive with a long delay?
Delays can be caused by overload of the operator's networks on holidays, a weak signal in the room or an energy saving mode that The application does not wake up immediately. Also check if the phone's memory is full.
Can viruses block the arrival of SMS?
Yes, malware can intercept messages with confirmation codes (Trojan bankers). If you suspect a virus, scan your phone with an antivirus and check application permissions in the privacy settings.
What to do if you do not receive SMS from only one number?
Most likely, this number was accidentally blacklisted or you blocked the contact. Check the list of blocked numbers in the telephony application and in the message settings.
Does full phone memory affect the receipt of SMS?
Yes, if the device's internal memory is 100% full, the system may not have space to record a new incoming message and it will be lost. Free up at least 100-200 MB of space.
Will replacing the SIM card help if it is working?
If the SIM card is old (more than 5 years), its contacts could oxidize and the chip could degrade. Replacing with a new one in the operator's salon often solves problems with unstable reception, even if the card is visually intact.