The blocked number is called Xiaomi: why it happens and how to fix it

You blacklisted a number on your Xiaomi, but it still gets a nickname? This problem is more common than it seems — and the reasons can be in both the settings of the smartphone and the work of the mobile operator. Unlike the iPhone or "pure" Android, MIUI firmware has its own nuances of lock handling, and sometimes even the hardware features of models like the Redmi Note 12 or POCO X5 are to blame.

In this article, we will not only list the possible causes, but also give specific solutions for each of them – from resetting communication settings to manually editing system files (if you are ready for experiments), and also analyze why some numbers bypass blocking through messengers or messengers. IP-If you've tried standard methods before and nothing has worked, you'll find advanced diagnostics here.

1.Blocking works only for calls, not for SMS

Many Xiaomi users are faced with the paradox: the number added to the blacklist, calls from it do not pass, but SMS comes. This is not a bug, but a feature of the implementation of locking in MIUI. By default, the system separates the blocking of calls and messages — and this can be fixed.

To block the number completely:

1. Open the Phone app.
2. Go to the Journal. → ⋮ → Blacklist.
3. Click on the locked number and enable the option to Block messages.

If this option is not available, you have an older version of MIUI (up to 12.5).

• 📱 Update the firmware through Settings → The phone. → Updating the system.
• 🔧 Use a third-party blocking app (such as Truecaller or Blacklist).
• 📧 Check the Messages app settings – sometimes there’s a separate blacklist.

2.The number is locked, but is called 1-2 times before activation

If the blocked subscriber manages to make 1-2 beeps before the smartphone resets the call, this is a typical problem of delaying processing of the blacklist in MIUI.

• 🐢 CPU congestion (especially on budget models like Redmi) 10A).
• 📡 Bad signal network (3G/4G instead 5G).
• 🔄 Conflict with battery-saving applications (e.g., Security or Battery Saver).

Decisions:

1. Turn off battery optimization for the Phone app: Settings → Applications → Application management → Phone → Battery → Without restrictions
2. Enable Priority Mode for Calls in Settings SIM-map.
3. Try an alternative dialer (like Google Phone from the Play Market).

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If the problem arises only in a specific SIM-If you want to move it to another slot (e.g. from Slot 1 to Slot 2), this sometimes helps because of the hardware nuances of the communication module.

3.The operator ignores your lock

Mobile operators (MTS, Beeline, Tele2, MegaFon) have their own number locking systems that can conflict with MIUI. If you add a number to the blacklist on your phone, but do not block it from the operator, the call can pass through their server.

How to check and correct:

⚠️ Attention: The locking on the operator and on the phone are two different systems. MIUI, The operator can pass the call through his PBX. it is recommended to use both methods simultaneously.

4.The number is disguised as another (spoofing)

About 15% of the cases of “breakthrough” locks on Xiaomi are associated with spoofing – spoofing – changing the number of the caller. Scammers or spammer services use Caller ID Spoofing technology to show you another number (for example, +7 495 123-45-67 instead of the real +375 29 123-45-67). MIUI blocks only the number that you added to the blacklist, so the swapped call passes.

How to recognize spoofing:

• 🔍 The number appears as a random combination of numbers (for example, +7 900 111-22-33).
• 📞 After the challenge drops, comes SMS call back.
• 🌍 The number belongs to another region/country (check through Truecaller or who-called.me).

Decisions:

1. Use applications with advanced spoofing protection (Hiya, Showcaller).
2. Put it in. MIUI Option to Block Hidden Numbers (Settings) → SIM-maps and mobile networks → Locking down calls).
3. If a bank or security call is on, never call back to unfamiliar numbers.

5. MIUI firmware bug (especially in versions 12-14)

Some MIUI builds have critical bugs in the telephony module that make the blacklist incorrect. For example, MIUI 13.0.4 for Redmi Note 11 had a problem resetting lock settings after rebooting. And in MIUI 14.0.2 on Xiaomi 12T, calls from locked numbers would pass if the smartphone was connected to Wi-Fi Calling.

How to diagnose and correct:

1. Check out the MIUI version in Settings → About Phone → MIUI version.
2. Find your model on the 4PDA or XDA-Developers forums, where patches are often posted.
3. Reset network settings: Settings → SIM-maps and mobile networks → Resetting network settings

If the problem persists, try rolling back on the older version of MIUI or installing a Global ROM instead of China ROM (the latter often has lock bugs).

Check out MIUI | Find bug information for your model |Reset network settings |Try to roll back on old firmware |Install Global ROM (if China ROM is worth it)

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6. Conflict with applications for calls (WhatsApp, Viber, Telegram)

If a blocked number is dialed through WhatsApp, Viber or Telegram, it is not a MIUI bug, but a feature of the messengers. They use their own communication channels (VoIP), which are not controlled by the standard Android telephony module.

How to block calls in messengers:

⚠️ Attention: The lock in the messenger does not block calls through the normal mobile network! To completely cut off the subscriber, you need to block him and in the mobile network. MIUI, and in each messenger separately.

Hardware problems (communication module or SIM-map)

In rare cases, the problem lies in physical damage to the communication module or malfunction. SIM-This is true for smartphones that:

• 💥 Falling from a height (especially to the corner where the communication chip is located).
• 🌊 Contact with moisture (even if the phone worked normally after that).
• 🔥 Overheated (for example, during charging or playing).

Signs of hardware problem:

• Calls from all numbers are delayed or terminated.
• The symbol of the network disappears and reappears.
• SIM-The card is determined only after rebooting.

What to do:

1. Try another one. SIM-card (preferably another operator).
2. Test your phone in Flight Mode with Wi-Fi enabled – if VoIP calls are working normally, the problem is with the mobile phone module.
3. Contact Xiaomi Service Center for the antenna module diagnostics.

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If the problem occurs after a fall or moisture, do not try to fix the phone yourself - this can lead to a complete failure of the communication module.

FAQ: Frequent questions about locking numbers on Xiaomi