How to permanently block SMS-Xiaomi Redmi Note 12 spammers: from standard tools to hidden features

Why? SMS-Spammers are attacking your Redmi Note 12 and how to stop it

Owners of Xiaomi Redmi Note 12 face a wave of unwanted messages more often than users of other smartphones - and this is not an accident. MIUI, And it's a default, aggressive data collection that marketers and fraudsters buy from intermediaries, knowing that Redmi owners are more responsive to the data. SMS-According to Juniper Research, spam openness on Xiaomi is 12% higher than on Samsung).

The second reason is a vulnerability in the Dual SIM on Redmi Note 12. When you use two SIM cards, operators exchange data about your activity through common databases. Spamers exploit this channel by sending messages from swapped numbers that are difficult to block using standard methods, for example, if you received an SMS from +79001234567, and a day later a message came from +79001234568 - this is the work of the algorithm for bypassing locks.

In this article, we will discuss 5 ways to block, including hidden MIUI 14/15 features that Xiaomi does not advertise.

  • 🔍 Set up a built-in spam filter that works even without the internet
  • 📱 Use applications that do not conflict with MIUI
  • 📡 Block it. SMS at the operator level (including for MegaFon, Beeline, MTS)
  • 🛡️ Create a blacklist of numbers that syncs with Mi Account
  • 🔧 Recover deleted messages if the spammer has already managed to impose the virus
📊 How often do you get spam SMS on Xiaomi?
Every day.
Several times a week
Rarely, but accurately.
Never.

Method 1: MIUI’s Built-in Spam Filter – How to Enable and Why It Doesn’t Always Work

MIUI 14/15 firmware on Redmi Note 12 has a built-in spam blocker, but by default it is disabled or running in "smooth" mode to activate it:

  1. Open the Messages app (the envelope icon on the desktop).
  2. Slip on three dots in the top right corner → Settings → Block and spam filter.
  3. Activate the switches: 📌 Spam filter (blocks messages from suspicious numbers) 📌 Blocking of unknown numbers (prohibits) SMS from unsaved contacts) 📌 Checking links (analysing) URL phishing)

Blacklist.

⚠️ Attention: Built-in filter MIUI It has two critical flaws:

  1. It does not block SMS with alphabetical names (for example, from SberBank or PobedaAvia).
  2. The database of spammer numbers is updated every 2-3 weeks, so new mailings are held.

💡

If after installing the blocker, important SMS (for example, from a bank) stopped coming, add bank numbers to the "White List" in the application settings.

Method 3: SMS lock at the operator level - instructions for MTS, Beeline, MegaFon, Tele2

Telecom operators provide spam blocking services, but few people know how to activate them correctly, the main difference from standard methods is that the lock occurs before the SMS reaches your phone, which saves traffic and battery.

📌 Instructions for popular operators:

  • 📡 MTS: Send. SMS with the text STOP SPAM to the number 111. Or call on *111*0887# and follow voice instructions. ⚠️ Attention: Service paid (30 rub/month, but blocks 95% mailings, including "gray" numbers.
  • 📡 Beeline: Dial it up *110*789# and press the call, or send an empty one. SMS on 7878. Free for All and Unlimited fares".
  • 📡 Megaphone: Send SMS Prohibit Advertising on 000105 or activate in your personal account: Services → Protection against spam.

Tele2:

  1. Dial *220*1# and follow the instructions.
  2. Or send an SMS with STOP text to 2200.

🔹 Important: Operator locking does not work for:

  • 💳 SMS Banks (they come through secure channels)
  • 📧 Messages with alphabetical names (e.g., Amazon")
  • 🔄 Redirected messages (if you have activated the service "Redirection")

A critical feature of Redmi Note 12 is that if you use Dual SIM, the blacklist only applies to the SIM card that the message is sent to. To lock the number globally, add it manually for each SIM.

💡

A MIUI blacklist blocks not only SMS, but also calls from blocked numbers, which is convenient but can lead to the skip of important notifications (for example, from the delivery service).

Method 5: Radical measures - change the number, SIM-card-fixing

If spam is becoming unbearable, and standard methods are not working, you have to take radical measures, and let's look at three options, from the simplest to the most complex.

🔄 1. Change of telephone number

  • ✅ Pros: 100% spam free, new number not known to mailing lists.
  • ❌ Cons: loss of all contacts tied to the old number (banks, social networks, instant messengers).