Error Sending SMS to Xiaomi via Tele2: 7 Reasons and Solutions (2026)

You try to send a message with Xiaomi Redmi Note 12 or POCO X5 Pro, but instead of sending you see the notification “failed to send SMS” or “Sending error”? The problem is especially common for Tele2 subscribers – and the fault can be both phone settings and problems on the operator’s side. In this article, we will analyze all possible causes, from the banal absence of a network to hidden bugs of MIUI firmware, and give step-by-step instructions for each of them.

It is important to understand that if the SMS is not sent to only one number, the problem is most likely to the recipient (for example, he blocked messages from unknown senders). SIM-We'll start with the simplest checks and gradually move on to the more complex settings, so you save time and nerves.

We warn you beforehand: some solutions will require a phone reboot or even a network reset. If you have important unsaved data (such as unsynchronized contacts), back up before you start manipulating. And yes, check the balance: sometimes Tele2 blocks SMS sending with a negative or zero score, even if you have unlimited rates.

Basic parameters verification: network, SIM-map

Start with the obvious – but these are the things that are most often overlooked. 90% of the problems with sending SMS to Xiaomi are solved at this stage.

• 📶 Network Signal Level: If the status bar doesn't have a network icon (or it's gray), the phone can't physically send a message. Try moving to another location or turning on Airplane Mode for 30 seconds, then turn off.
• 💳 Situation SIM-cards: Remove the tray and check if the card is inserted correctly. On Xiaomi with a hybrid slot (e.g. Redmi Note 11) make sure you don't mix up the nests for the map SIM1 and SIM2.
• 💰 Account balance: Go to the My Tele2 app or dial *155#. If the balance is in the negative, replenish the account - the operator can block services.
• 🔄 Slot switching SIM: If you have two-sim Xiaomi, try sending a text message with the second one. SIM-If you can, the problem is in the first card or its settings.

Pay special attention to the network indicator. on MIUI it can show “4G” or “LTE”, but SMS is sent via 2G/3G. If in your region Tele2 has disabled 2G (as in some regions of Russia since 2023), the phone will not be able to send a message, even if the Internet works.

⚠️ Note: If you use Tele2's eSIM, check its activation in your personal account. An inactive eSIM won't be able to send SMS even if the Internet is working.

2. Network setup: forced 3G and APN selection

If the basic checks didn't work, the problem lies in the incorrect network settings. Xiaomi on MIUI sometimes knocks down APN settings (access points) or automatically connects to 4G, where SMS is not supported.

Step 1: Forced to turn on 3G

Go to Settings. → SIM-maps and mobile networks → [Yours. SIM Television2] → Preferred type of network. 3G (or WCDMA). If there is no such item, select 2G/3G (motor-car).

Step 2: Reset your APN settings

Open the Settings. → SIM-maps and mobile networks → [Yours. SIM] → Access points (APN). Click on the three dots in the top right corner and select Reset to default values.

Step 3: Manually Create APN for Tele2

If the reset doesn’t work, create an APN manually:

1. In the same APN menu, press "+" (add).
2. Fill in the fields like this: Name: Tele2 MMS APN: internet.tele2.ru Username: Leave your password blank: leave it blank MMSC: http://mmsc.tele2.ru MMS-proxy: 193.12.192.182:8080 MCC: 250 MNC: 20 Type of authentication: PAP Type APN: default,mms,supl

Save and select a new APN.

Critical detail: if you use the Tele2 tariff with unlimited SMS (for example, “My Online”), make sure that the option “Banning Outbound SMS” is not activated in your personal account.

3. Firmware problems MIUI: bugs and updates

Xiaomi regularly releases updates for MIUI, but sometimes they contain critical bugs that affect the performance of SMS, especially the Redmi 10, POCO X3 Pro and Mi 11 Lite models, where users have complained massively about problems with sending messages after the updates MIUI 13 and MIUI 14.

How to check the MIUI version and update

Go to Settings → About Phone → MIUI Version. If the version is older than MIUI 14.0.5 (for models 2023-2026), it is recommended to update:

1. Open Settings → Update the system.
2. Click on "Check Updates."
3. If a new version is available, download and install it.

Reversing to the previous version of MIUI

If the problem occurred after the last update, you can return the old firmware.

1. Download the desired version of MIUI from the official Xiaomi website (choose Stable, not Developer).
2. Go to Settings. → The phone. → Version. MIUI and tap 7 times on the line "Version" MIUI», to activate the Developer Mode.
3. Return to Settings → Additional → For developers and enable USB Debugging and OEM Unlocking.
4. Connect your phone to your PC, use the Mi Flash Tool to roll back.

⚠️ Attention: Firmware rollback erases all data from the phone. Pre-backup through Settings → Additionally. → Backup and reset.

If you don’t want to take risks, try resetting your network settings without rolling back firmware: Settings → SIM-maps and mobile networks → Network resets, which will delete all stored Wi-Fi and mobile network settings, but will not affect personal data.

4. Conflicts with applications: messengers and antiviruses

Sometimes third-party apps block SMS sending, most often the fault is:

• 🔒 Antiviruses (Avast, Kaspersky, 360 Security) – can consider SMS as a potentially dangerous activity.
• 📱 Call and SMS Managers (Truecaller, SMS Organizer – intercepting sending messages.
• 🔄 Battery Optimizers (Greenify, AccuBattery) – limit the background operation of system services.
• 📧 Titanium Backup Apps – Can damage settings files.

To check if the third party is to blame:

1. Launch your phone in Safe Mode (press the power button → “Safe Mode”).
2. Try texting, and if you can, there's a problem in one of the apps that you've installed.
3. Remove suspicious programs by checking for SMS after each deletion.

Pay special attention to applications with administrator rights. They can block system functions. To check the list of such applications, go to Settings → Passwords and Security → Privileged Access → Device Administrators.

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If you use Dual Apps on Xiaomi, try disabling this feature for the Messages app. Sometimes cloned services conflict with the mainstream ones.

5. Hardware problems: SIM-map

If the software methods did not help, the reason may lie in the hardware:

• 🛠️ Damaged. SIM-map: Microcracks or wear of contacts can cause malfunctions. SIM other-phone.
• 📡 Faulty modem: Xiaomi is responsible for communication chip Qualcomm Snapdragon or Mediatek. its failure can block the sending of SMS.
• 🔌 Oxidized slot contacts: Humidity or corrosion disrupt the connection. gently clean the slot with alcohol.
• 🔋 Weak battery: With a low charge (less than 15%), the phone can limit background processes, including texting.

To diagnose a hardware problem:

1. Try another one. SIM-If you send a card (for example, from MTS or MegaFon), if you send an SMS with it, it is your Tele2 card that is to blame.
2. Check if the mobile internet is working, and if it's not, the problem is definitely in the modem or the antenna.
3. Connect your phone to your PC and check logs via ADB: adb logcat | grep -i "sms" If there are errors in the logs such as RadioIllegalArgumentException or SmsManager failed, this indicates a hardware failure.

⚠️ Warning: If the phone falls, overheats or turns off when you try to send a text message, contact the service center immediately.

6. Blocking by the operator: spam filters and restrictions

Tele2 is actively fighting spam, and sometimes ordinary users get the distribution, your number can be blocked for:

• 📤 Mass mailing (more than 30 SMS per hour).
• 🔢 Suspicious traffic (e.g. sending messages to short numbers).
• 🚫 Recipients’ complaints (if someone tagged your SMS as spam).
• 📵 Unpaid services (even if you have unlimited, check your debts).

To unblock:

1. Call Tele2 Support on 611 (free call).
2. Use the voice menu: dial 1 (for individuals), then 3 (service issues), then 2 (SMS).
3. If the automatic system doesn't work, wait for the operator to tell you that no text messages are sent. Ask to check the status of your number.

Also check if you have activated the service "Banning Outbound SMS" to turn it off:

1. Dial *155*00# and press the call.
2. In the answer, find the line "Banning outgoing SMS." If you have an SMS, dial *155*00*0#.

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If Tele2 support says that everything is fine on their part, but the SMS is still not sent - the problem is definitely in the phone or the phone. SIM-map.

7. Alternative ways to send SMS

If none of the methods worked, use the workarounds:

• 🌐 Online Services: Send SMS via the web version of My Tele2 (Messages section»).
• 📲 Messengers: Use WhatsApp, Telegram or Viber – they send messages over the Internet.
• ⚙️ Third-party apps: Install Textra SMS or Pulse SMS They can bypass system constraints.
• 📧 Email: Some operators allow you to send SMS to email (e.g. number)@sms.tele2.ru).

For corporate users, SMS-mailing service (for example, SMS.ru or TurboSMS) is suitable, which integrates with the API and allows you to send messages bypassing the operator.

If you frequently send SMS messages abroad, check whether Tele2 supports roaming in this country, and in some regions (for example, Crimea), SMS can be blocked due to sanctions restrictions.

FAQ: Frequent questions about SMS error on Xiaomi