Why not send messages from the phone Xiaomi: a complete guide to troubleshooting

Have you clicked “Send” and SMS still hangs in the status “Send” or disappears without a trace? the problem with sending messages on Xiaomi smartphones (including Redmi, POCO and Mi) can be due to a dozen different reasons, from the banal lack of network to hidden bugs in the firmware MIUI. In this article, we will analyze all possible scenarios, including those that are not written in the standard instructions.

Xiaomi phones are particularly well integrated with the company’s services (such as Mi Cloud or Mi Messages), which sometimes conflict with carrier services, and many users experience a problem after upgrading the MIUI or changing the SIM- card. We will not limit ourselves to obvious tips like “reboot your phone” but instead offer symptom diagnosis and specific solutions for each situation.

Basic parameters verification: network, SIM-map

Start with the obvious, but often ignored: make sure your phone can send SMS at all.

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If you have a two-sim Xiaomi, try sending the SMS from another SIM- card – this will help to localize the problem (hardware malfunction or software).

Pay special attention to the network mode. Some MIUI firmware has 4G (LTE) activated by default, which does not support SMS without additional settings, to check this:

1. Go to Settings. → SIM-maps and mobile networks.
2. Select your SIM- card and tap the Network Type.
3. Install 3G or 2G/3G/4G (auto) instead of 4G only.

⚠️ Warning: If the SMS network is up and running after the network type change, but LTE is gone, return the settings and contact the operator to activate the VoLTE (voice and SMS via 4G).

2. failures in the Messages app: cache, data, permissions

Xiaomi’s standard Messages app (com.android.mms) is known for bugs, especially after updates. The first thing to do is clear the cache and data:

1. Open Settings → Applications → Application Management.
2. Find Messages (or Messaging on English firmware).
3. Slip the Warehouse → Clear the cache and Clear the data.

If this doesn’t help, check the app’s permissions:

• 📱 SMS: Authorization to send and read messages must be enabled.
• 📡 Phone: Permission to access network information.
• 🔒 Storage: Needed for backups (but not critical for sending).

On some MIUI firmware (especially POCO and Redmi with global ROMs), the Messages app can be blocked by the battery optimizer to fix this:

1. Go to Settings → Battery and Performance → Battery Consumption Management by Apps.
2. Find Messages and install Without Limits.

3.Dual Apps and Second Space Conflicts

Xiaomi offers Dual Apps (cloning apps) and Second Space (secret profile), which sometimes break the SMS. If you use these features, the problem may lie in:

• 🔄 Duplicate Services: A cloned Messages app may conflict with the original.
• 📵 Network Lock: Second space sometimes restricts access to the SIM- card.
• 🔑 Synchronization errors: Contacts and SMS can get stuck between spaces.

To test this hypothesis:

1. Open Settings → Dual Apps and remove the Messages clone (if any).
2. Go to Settings → Second Space and temporarily turn it off.
3. Try sending SMS messages in the main space.

If the problem is gone, it means one of these functions is to blame.

• Use an alternative messenger (e.g. Textra or Pulse SMS) in the second space.
• Opt out of Dual Apps for the Messages app.

4. MIUI firmware errors: bugs and workarounds

Some versions of the MIUI (especially the MIUI 12-14 on Redmi's budget models) contain critical bugs that either prevent the SMS from being sent or are sent with a delay of up to several hours.

If your model and MIUI version are in the table, follow the solution. If not, try resetting your network settings (this will delete stored Wi-Fi and mobile network settings, but will not affect personal data).

For advanced users: if the bug appears after the update, you can try to roll back to the previous version of MIUI via Fastboot.

⚠️ Warning: A firmware rollback will void the warranty and may result in a hard brick.Do this only if other methods have failed.

5. Blocking by the operator: spam filters and restrictions

Mobile operators (especially MegaFon, Beeline and Tele2) actively filter SMS to fight spam, sometimes ordinary users get caught, signs of blocking by the operator:

• 🚫 Messages do not go to specific numbers (e.g., short numbers of banks or services).
• ⏳ SMS depart with a delay of 10 to 30 minutes.
• 📵 A notification is received from the operator about the blocking (for example, "Your message looks like spam").

To check if the operator is blocking your SMS:

1. Try sending a message to another number (like your second phone).
2. If the SMS goes away, the problem is with the recipient or its operator.
3. If you are not going anywhere, call the operator and ask about spam filters.

Some operators (e.g., MTS) allow you to disable filtering SMS through USSD- commands:

• For MTS: dial *111*465# and follow the instructions.
• For Beeline: *110*180#.
• For Tele2: *155*1#.

If the operator has confirmed the blocking, but refuses to remove it, try sending SMS via alternative channels:

• 🌐 Online services: SMS.ru, TurboSMS (paid, but reliable).
• 📧 Email: Many operators allow SMS to be sent with an email (e.g., a number @sms.mts.ru).

Hardware malfunctions: communication module and antenna

If the software methods didn't work, the problem could be the hardware.

• 📡 Damaged communication module: Often occurs after falls or moisture.
• 🔌 Contact oxidation SIM- cards: Especially relevant for phones over 2 years old.
• 🔋 Antenna switch malfunction: A symptom is a missing network signal.

How to diagnose a hardware problem:

1. Check the SIM- card on another phone. If that's where the SMS is sent, it's your Xiaomi fault.
2. Check the SIM- card tray, if there is any evidence of corrosion or dirt, clean the contacts with alcohol.
3. Check the network indicator. If the signal is constantly lost (even in the zone of confident coverage), it is a sign of a malfunction of the antenna.

If you suspect a hardware breakdown, you can try a temporary workaround:

• 📶 Use Wi-Fi Calling (if supported by an operator). Enables in Settings → SIM- Maps → Wi-Fi Calling.
• 📱 Install the messenger with SMS support over the Internet (e.g., Google Messages with Chat feature).

⚠️ Warning: If your phone falls or gets wet, don’t try to disassemble it yourself – the risk of damage to the fee for unqualified repairs is extremely high.

7. Alternative solutions: third-party applications and services

If the standard methods didn't work, it's time to consider workarounds.

📲 Third-party SMS- messengers

Some apps are better at sending SMS than standard ones from Xiaomi:

• Google Messages – supports RCS (Internet Message Sharing) and runs on MIUI.
• Textra SMS - flexible settings and no bugs with dual-SIM.
• Pulse SMS synchronizes messages between devices.

To install an alternative messenger:

1. Download the app from Google Play.
2. Open it and allow access to SMS.
3. In the application settings, select it as the default application.

🌍 Online Services for Sending SMS

If the phone does not send SMS at all, you can use web services:

• SMS.ru is a platform for mass and single sending.
• TurboSMS supports sending to short numbers.
• Email-to-SMS – sending via email (for example, 79123456789@sms.beeline.ru).

For business tasks (mailing, notifications) suitable API-services:

• Twilio is an international SMS sending via API.
• SMSAero is a Russian service with low tariffs.

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If you need to send SMS (for example, for work), use a backup channel, a second phone or an online service. Don't rely on one device if the problem is systemic.

FAQ: Frequent questions about the problem with SMS on Xiaomi