Why messages are not sent from the Xiaomi phone: a full analysis of the causes and solutions

When Xiaomi refuses to send SMS

Did you click “Send” and the message still hangs with an exclamation point or disappeared without a trace? The problem with sending SMS/MMS on Xiaomi smartphones is one of the most common complaints of users, and both the budget Redmi Note 12 and the flagship Xiaomi 14 Pro suffer. 80% of cases are not hardware malfunctions, but software failures or incorrect settings.

In this article, we will examine all possible causes, from the banal absence of a network to the hidden limitations of the operator, as well as give step-by-step instructions for diagnosing and troubleshooting. MIUI, For example, did you know that in some regions Xiaomi defaults to block the sending of the message? MMS Or that resetting network settings can remove critical APN-parameters?

Before you carry your phone to the service center, check 10 points from our guide – in 95% of cases, this solves the problem in 5-15 minutes.

Verification of baseline conditions: SIM-map, network and balance

Start with the obvious, sometimes the problem isn't the phone, it's the external factors, and here are three key things to check first:

• 📶 Network signal level: If the status bar displays E (Edge) or no network indicator at all, SMS Try moving to the area with the best coverage or switching to manual network selection in Settings → SIM-maps and mobile networks → Choice of network.
• 💳 Account balance: Some operators (e.g. Tele2 or Iota) have sending SMS Pay even at unlimited rates.
• 🔄 Activity SIM-Put the card in another phone and try to send it to the other phone. SMS. If it does not work, the operator has a problem (possibly the card is blocked for debts or expired).

Pay special attention to flight mode and battery saving. In MIUI, these features can block background activity of the Messages app, even if you haven't manually enabled them. Go to Settings → Battery and Performance → Charge Saving Mode and make sure there are no restrictions on system applications.

⚠️ Note: If you use two of these SIM-Check which one is selected for sending. SMS by default. MIUI This is set up in Settings. → SIM-maps and mobile networks → SIM-default-card SMS. Often users miss this point and try to send a message from an inactive card.

2. APN settings: why MMSs don't go, but SMSs do

If SMS They go, and MMS — The problem is almost certainly in the access points. APN. This is a set of parameters that the phone uses to connect to the operator's network. MIUI These settings are often lost after updates or changes SIM-map.

To check the APN:

1. Go to Settings. → SIM-maps and mobile networks → [Yours. SIM-map] → Access points (APN).
2. If the list is empty or there is only one item with the name of the default or mms type, then the settings are lost.
3. Click on the three dots in the top right corner and select Reset to default values.
4. If that doesn’t work, create a new APN manually (options can be found on your carrier’s website).

Here is an example of the correct APN settings for MTS (current for 2026):

A critical feature of Xiaomi: in some firmware, MMS is not sent over Wi-Fi, even if the option “Send MMS over Wi-Fi” is enabled. The solution is to force mobile data to send MMS in the APN settings (APN type option must contain mms).

3. failures in the Messages app: cache, data and rights

Messages in MIUI is often “glutched” due to overcache or insufficient rights. If messages are not sent, but the network and APN are set up correctly, follow the following steps:

1. Cache and data cleanup: Go to Settings → Applications → Application Management → Messages. Click Clear Cache and Clear Data (Warning: This Will Delete All Your SMS!). Reboot your phone.
2. Permissions Check: Same menu (Application Management) → Communications → Permits) make sure that they are included: 📱 SMS (necessarily!) 📶 Mobile data 📎 Storage (for the purpose of MMS)

If messages still don’t go out after cleaning up the data, try installing an alternative SMS application like Google Messages or Textra SMS. This will help determine if the standard Xiaomi app is to blame.

⚠️ Attention: In the firmware MIUI 14+ There is a bug that the Messages app can block sending SMS active VPN. If you use VPN, Turn it off and try to send the message again.

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If SMS is gone after cleaning the data, but you need to restore them – use applications like SMS Backup & Restore (pre-backup!).

4. Blocking by the operator: spam filters and restrictions

Operators are actively fighting spam, and sometimes ordinary users are being handed out, and if your messages don't reach the recipient, but the phone shows as sent, they may be blocked by the operator.

• 📞 Call your carrier’s short support number (e.g. 0890 for MTS or 0611 for Beeline) and check if your number is restricted.
• 🔍 Check the history. SMS If there are records of messages sent, but the recipient does not receive them, the problem is on the recipient’s side (for example, he has activated a spam filter).
• 🚫 Make sure your number is not blacklisted. Some operators automatically block numbers that send messages to short numbers (for example, for voting or services).

Especially often, users who:

• Sending SMS to short numbers (for example, to pay for services).
• They use virtual SIM-card.
• Activated tariffs with a restriction on SMS (for example, “only the Internet”).

If the operator has confirmed the lock, ask to unlock the number, which usually takes from a few hours to a day. SIM-map.

5. Software failures: updates, firmware and “chips” MIUI

MIUI is known for its surprises, and SMS problems are no exception. Here are the most common scenarios:

• 🔄 Failure after update: If the problem occurred immediately after installing the new version MIUI, try to roll back on the previous firmware or wait for a patch (usually bugs with the SMS corrected within 1-2 weeks).
• 🛠️ Conflict with optimization MIUI. In the settings Settings → Special opportunities → Optimization MIUI Turn off the Deep Optimization function – it can block the background work of the Messages application».
• 🔒 Restrictions on regional firmware: Some models (e.g. Xiaomi for the global market) may have features disabled in firmware for China or India. SMS/MMS foreign SIM-So the solution is to reflash the phone to the global version. MIUI.

If you suspect that the firmware is to blame, check the error logs:

1. Install the Logcat Extreme app from Google Play.
2. Try sending SMS and immediately look at the logs for errors such as SmsManager or Telephony.
3. If you see errors like Radio not available or Network reject, the problem is exactly on the side of the firmware or communication module.

In extreme cases, you can reset your network settings (not to be confused with a full phone reset!):

Settings → System and device → Resetting settings → Resetting network settings

This will delete all stored Wi-Fi networks, passwords and APN settings, but will not affect personal data.

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If the problem has occurred after the MIUI update, check the forums (like 4PDA or Xiaomi Community) – it may be a massive bug and there’s already a workaround.

Hardware malfunctions: communication module and antenna

If all software methods have been tried, but SMS still doesn't get sent, the cause may be hardware.

• 📡 No messages are sent from any of them. SIM-Cards (checked on 2-3 different operators).
• 🔌 In the status bar, the network indicator constantly flashes or is displayed without service.
• 🔧 The phone stopped catching the network after falling, getting moisture or disassembling itself.

The most vulnerable components:

1. Communication module (chip that handles networking) When it is damaged, the phone can see the network but not send SMS.
2. Antenna switch (responsible for switching between the two) SIM-If it's broken, one of the SIM-The cards may not work.
3. Slot SIM-Oxidized or bent contacts lead to poor connection.

For diagnosis:

1. Try inserting. SIM-Map to another phone – if it works there, the problem is your Xiaomi.
2. Check if the contacts are not bent in the slot SIM-Circle them with a needle (if they are drowned).
3. Run the hardware test through the engineering menu: ##4636## In the Phone Information section, see the network status. If the Service status bar says Disabled or Emergency Calls Only, this confirms the hardware problem.

⚠️ Warning: If the phone was in a wet environment (for example, after rain or in the bathroom), do not try to disassemble it yourself - oxidation may affect several components.

7. Alternative ways to send SMS if nothing helps

If standard methods do not work and you need to send a message immediately, use one of these methods:

• 🌐 Online services SMS: SMS.ru (paid but reliable) TurboSMS (free trial period) SMS from the website, specifying the sender number (your phone number).
• 📧 E-mail to the SMS. Some operators support the shipment SMS For example, for MTS, you can send an email to [number]@sms.mts.ru (for example, 79123456789@sms.mts.ru).
• 🤖 Automation via Tasker. If you have root access, you can set up the sending. SMS via Tasker + AutoNotification plugin. This bypasses the limitations of a standard application.

For business tasks (sending out, notifications) consider:

• SMS-gateways (for example, SMSCenter or SMSC.ru).
• API operators (MTS, Beeline and MegaFon have documented APIs for sending SMS).

Remember: Most alternative methods are paid or have restrictions (e.g., a limit on the number of SMS messages per day).

FAQ: Frequent questions about SMS issues on Xiaomi