How to unblock SMS on Xiaomi: all ways to unlock messages

Lockdown SMS on smartphones Xiaomi, Redmi and POCO — Common Problems Users Face After Updating MIUI, shift SIM-Most often, the system restricts sending messages due to suspected spam, operator incorrect settings or internal firmware errors. SMS or the use of duality SIM-card-to-card.

In this article, we will analyze all the current ways to remove the lock – from the basic settings in the menu. MIUI Advanced methods with the use of ADB We will pay special attention to the reasons why Xiaomi may block the system files. SMS, And we'll give you some advice on how to avoid repeated restrictions if you encounter errors like, "No message sent", "SMS-Service unavailable" or "Sending limit is exceeded" - here you will find a solution.

Why Xiaomi is blocking SMS sending: the main reasons

Before you start unlocking, it is important to understand what caused the restriction. MIUI has several mechanisms that can block SMS:

• 🔄 Update firmware: After mayorapdate (for example, with MIUI 13 on MIUI 14) the operator settings are reset, which leads to a conflict with SIM-card.
• 📵 Dual SIM: If one of them SIM-The card is inactive or owned by another operator, the system may block the card. SMS both.
• 🛡️ Security features: Included Spam Protection or Message Filter MIUI Sometimes they mistakenly block legitimate SMS.
• 📱 Third-party apps: Messengers like Truecaller or SMS Organizer can intercept the rights to send messages.
• 🔧 Operator errors: Problems on the side of the mobile provider (for example, MTS, Beeline, Tele2) also lead to blocking.

Most often, the lock is temporary and involves incorrect APN settings (access points). However, in some cases, such as when you activate Developer Mode or rooting, the restrictions can become permanent. If you recently changed firmware through Fastboot or Recovery, the likelihood of a system failure increases.

⚠️ Note: If the lock occurred after installing custom firmware (for example, LineageOS or Pixel Experience), standard methods may not work. MIUI via Mi Flash Tool.

Method 1: Checking the settings SIM-card-and-operator

Start with basic settings - often the problem is solved in 2 minutes. Open the Settings menu → SIM-Maps and mobile networks and follow the following steps:

1. Make sure that SIM-The card is activated (the icon next to the number should be green).
2. Check if it is selected as the primary SMS (In the Settings section SIM-map → Default choice).
3. If you use two SIM-Try to disable the second and send the cards. SMS first.

If SIM-the map is determined, but SMS Not sent, go to Settings → Mobile network → Access points (APN) and:

• 🔍 Find your operator profile (for example, Internet.mts.ru for MTS).
• 📝 If there is no profile, create it manually, specifying data from the operator’s website.
• 🔄 Save the settings and restart the phone.

APN name matches operator | Type APN is listed as "default,supl,mms" |Proxy and port not filled (unless required) | Username/password blank (unless otherwise indicated)

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Critical detail: If the APN type field contains only default in the APN settings, add mms through the comma – this often solves the problem with blocking MMS and SMS.

Method 2: Reset network settings and messages

If manually configuring APN didn't work, reset the network settings, which removes all stored Wi-Fi networks, passwords, and mobile Internet settings, but often restores SMS.

1. Open the Settings. → SIM-maps and mobile networks.
2. Select Reset Mobile Network Settings (or Reset Network Settings in older versions of MIUI).
3. Confirm the action and wait for the reboot.

After discharge:

• 📶 Connect to the mobile network manually (it may require input) PIN-code).
• 📩 Try sending it. SMS — If the lock is maintained, proceed to the next method.

If the network reset didn’t help, try resetting the Messages app settings:

1. Go to Settings → Applications → Application Management.
2. Find Messages (or Messages) and open its settings.
3. Select Warehouse → Clear data and Clear cache.

⚠️ Warning: Cleaning up the Messages app data will delete the entire history SMS! Pre-export important messages via the Settings menu → Import/export in the annex.

MTS|Beeline|MegaFon|Tele2.|Yota|Other-->

Method 3: Disable Spam Protection in MIUI

Xiaomi has integrated a spam filtering system into MIUI that sometimes blocks regular SMS messages to disable it:

1. Open the Messages app.
2. Press three points (⋮) in the upper right corner and select Settings.
3. Go to the section Protection against spam (or Message Filter).
4. Turn off all switches, especially Spam Blocking and Message Filtering.

If your MIUI version doesn’t have a separate spam protection section, check:

• 🔍 Security settings in Settings → Privacy → Security.
• 📱 Section Additional in the settings of the application "Messages".

After disabling the filters, try sending a test SMS. If the lock is maintained, proceed to the next method.

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If SMS is not sent after disabling the spam protection, check if third-party anti-spam applications (such as Truecaller or SMS Filter) are installed.

Method 4: Unlocking through Developer and ADB Modes

If standard methods don’t work, you’ll need to use hidden MIUI settings or ADB commands, which is suitable for advanced users.

Method A: Configure through the developer menu

Activate Developer Mode:

1. Go to Settings. → The phone.
2. Click on the MIUI version 7 times until the notification “You are a developer!” appears.
3. Back to Settings → Additionally. → For developers.
4. Find the USB debugging option and turn it on.

Now check the following parameters:

• 🔧 Inactive applications → Make sure that messages are not on the list.
• 📡 Background data activity → Include Messages for the annex.

Method B: ADB commands to unlock SMS

If the lock is due to system limitations, follow these commands through ADB:

adb shell pm grant com.android.mms android.permission.SEND_SMS


adb shell pm grant com.android.mms android.permission.RECEIVE_SMS




adb shell settings put global sms_short_code_confirmation 0

Explanation to the teams:

• SEND_SMS and RECEIVE_SMS — Restore the rights of the application "Messages".
• sms_short_code_confirmation 0 — disables the confirmation request when sending SMS Short numbers (for example, for banks).

⚠️ Attention: Teams ADB require connecting the phone to a PC with installed Xiaomi drivers and enabled debugging USB. Improper use can lead to system failures.

Method 5: Flashing the telephony module (advanced method)

In rare cases, an SMS lock is caused by damage to the telephony system module, which may occur after a failed update or rooting.

1. Download the full firmware for your model from the Xiaomi Firmware Updater website.
2. Unpack the file and find the firmware-update folder.
3. With TWRP or Mi Flash Tool, only the modem partition (not the entire image!) can be flashed.

Compatibility table for popular models:

After the module firmware:

• 🔄 Perform reset network settings (Settings) → Resetting settings → Resetting network settings).
• 📱 Restart your phone and check the shipment. SMS.

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Telephony firmware is an extreme method, and only use it if other methods fail, as improper actions can lead to loss of IMEI or complete network failure.

Additional tips and prevention of blocking

To avoid repeated SMS blocking on Xiaomi, follow these guidelines:

• 📲 Update the firmware only through official channels (Settings) → Updating the system).
• 🔄 Regularly reset the cache of the Messages app (every 1-2 months).
• 📵 Don't use duals. SIM from different operators, if you send them frequently SMS.
• 🛡️ Turn off battery optimization for the Messages app (Settings) → Battery → Optimizing the battery).

If you frequently send SMS to short numbers (for example, for banking), add them to the spam filter exceptions:

1. Open Messages → Settings → Protection against spam.
2. Select Exclusions and add numbers manually.

It is also worth checking whether the Limit function is enabled. SMS Some providers (e.g. Tele2) limit the number of messages per day for new ones. SIM-map.

Frequent questions about blocking SMS on Xiaomi