How to permanently disable spam calls on Xiaomi Redmi 9A: the full guide 2026

Spam calls on Xiaomi Redmi 9A have become a real scourge of modernity, from intrusive loan offers to fraudulent schemes with “card locking”. According to Roskomnadzor, in 2023, one in three smartphone owners faced daily spam calls, and models on MIUI – in the zone of special risk due to the popularity of the brand. Unlike flagships, the budget Redmi 9A does not have hardware protection against spam, but this does not mean that the problem is unsolvable.

In this article, we will discuss 5 proven methods of blocking spam calls, from hidden MIUI 12/13 functions to third-party applications and operator services. Particular attention will be paid to the unique feature of Redmi 9A: the absence of the NFC module allows you to bypass the limitations of some banking spam systems, which makes it easier to set up filters, you will learn how to weed out up to 90% of unwanted calls without root rights and loss of warranty.

Why Redmi 9A is especially vulnerable to spam calls

Budget Xiaomi Redmi 9A top-ranked-3 The most “spammed” smartphones 2026 Kaspersky Lab's version of the year, and the reasons are three key factors:

• 📱 Fraudsters deliberately attack owners of budget Xiaomi, hoping for less technical literacy of users.
• 🔄 Older Firmware: Many Redmi users 9A still working on MIUI 12 (released in 2020) lacks a new generation spam filter.
• 📡 Problems with IMEI: On some batches of devices there are duplicated IMEI (Especially with gray dealers, which automatically enters the number in the spam databases.

Interestingly, according to Truecaller, Redmi 9A owners receive 27 percent more spam calls than flagships of the same brand, because fraudsters use databases linked to device models, and budget smartphones are more likely to be blacklisted because of the mass.

Method 1: Built-in MIUI spam filter (hidden settings)

Even the Redmi 9A with MIUI 12/13 has a hidden spam blocking feature that Xiaomi doesn't advertise.

1. Open the phone application (pipe icon).
2. Slip on three dots in the upper right corner → Settings.
3. Select Blocking and Filtering (some firmwares call it a Spam Filter).
4. Activate the switches: 🔍 Spam filtering (using Xiaomi’s database) 📞 Blocking Unknown Numbers (Risk of Missing an Important Call!) 📊 Spam log (for blocking analysis)

Important detail: Xiaomi spam number databases are updated every 3-5 days, so new scams can slip through. Instant blocking will require manually adding numbers to the blacklist (more on this in the next section).

⚠️ Warning: Unknown number blocking will block ALL calls from numbers not stored in the phone book, including delivery, taxis and doctors, only if you are prepared to risk missing an important call.

Method 2: Manual number locking and blacklist

If the automatic filters don't work, you'll have to do it manually. On the Redmi 9A, there are two ways to blacklist the number:

Method 1. Through the call log:

1. Open the phone. → Journal.
2. Click on the spam number → Information (the icon “i”).
3. Choose Block → Confirm the action.

Method 2. Through security settings:

1. Go to Settings → Applications → Application Management.
2. Find the phone. → Number locking.
3. Add the number manually or import from SMS/magazine.

Critical nuance: operator filters work only for incoming calls to the Internet SIM-If you use messengers (WhatsApp, Viber, Telegram) to make calls, spam will continue to pass, so the solution is to set the lock separately in each application.

⚠️ Attention: Operators may conflict with built-in spam filter MIUI. If important calls have stopped coming after activation, disable one of the systems and check the other.

Method 4: Third-Party Apps to Block Spam

If the built-in tools don't work, it's time to put in heavy artillery, which is a specialized application, and Redmi 9A (with limited resources) is a good fit.

For the Redmi 9A, the best choice is Truecaller (maximum base) or ACR Call Blocker (flexible settings). Install only one application to avoid conflicts!

Instructions for setting up Truecaller on Redmi 9A:

1. Download and install the app from Google Play (don’t use APKs from third-party sites!).
2. When you first start, allow access to Contacts, Call Log and SMS.
3. Settings menu → Lock it, activate it: 🛡️ Blocking spam 📵 Blocking hidden numbers 🔍 Checking unknown numbers

Blacklist.

💡

After installing Truecaller, restart Redmi 9A to eliminate possible lags when processing incoming calls.

Method 5: Radical measures (for experienced users)

If spam calls don't stop despite all the measures, there are radical ways that they require technical skills and can affect the stability of the phone.

• 🔧 Shutdown SIM-Incoming cards: In Settings → SIM-Maps and mobile networks disable incoming calls for primary SIM, And then you just have the mobile Internet, and you'll get the calls through messengers.
• 📱 Use of the second SIM: Buy a cheap one. SIM-card (for example, Tele2 for 100 rubles) and transfer all important contacts to it.
• 🔄 Reset IMEI: On some of the Redmi firmware 9A dropable IMEI It's up to the factory (via the engineering menu ##4636###), which will reset the spam databases.
• 🛡️ Firewall for calls: Apps like NetGuard (requires root) can block spam at the packet level, but it’s hard to set up.

⚠️ Attention: Reset IMEI Modification of system files cancels Redmi warranty 9A And it can lead to operator locking, and only use these methods if you've exhausted all other options!

💡

Before taking radical measures, try to change the basic SIM-A new card (of the same operator) is often linked to a number rather than a device.

FAQ: Frequent questions about spam blocking on Redmi 9A