How to add a number to the blacklist on Xiaomi Redmi 9: all ways

Calls from intrusive sellers, scammers or ex-friends can be very upsetting. Xiaomi Redmi 9 owners are often faced with the question: how to effectively block an unwanted number so that it does not bother anymore? In this article, we will analyze all available methods, from standard MIUI functions to third-party applications, and also talk about the nuances of the blacklist on this model.

It’s important to understand that Redmi 9 runs on the MIUI shell, which offers several built-in locking tools, but their functionality may vary depending on the firmware version (MIUI 12, 13 or 14) and regional build. We tested all methods on current versions of the software and collected only working solutions.

If you are tired of spam or want to limit communication with certain people, this guide will help you set up the block as quickly as possible, and at the end of this article you will find answers to frequent questions and tips on how to optimize the blacklist.

Method 1: Blocking through a call log

The easiest and fastest method is to add a number directly from your call history, which is suitable if you've already had an unwanted contact.

1. Open the Phone app (the tube icon on the home screen).
2. Go to the Journal tab (usually located at the bottom of the screen).
3. Find the number you want to block in the list and tap it.
4. In the window with the details of the call, click on three vertical dots (⋮) top-right.
5. Select the item Block the number and confirm the action.

After that, all incoming calls and SMS from this number will be automatically rejected, an important nuance: on MIUI 14, the lock through the log works even for hidden numbers (if they even appear in the history).

The number appears in the call log |

The "Block" button is active (not grey) |

After the lockdown, a notification of success appeared |

A second call from this number does not pass.-->

If the Block button is inactive (gray), this may mean:

• 📵 The number is already on the blacklist.
• 🔄 Your version. MIUI outdated (update firmware)
• 🛠️ Phone has disabled the rights for the Phone application (check in Settings) → Annexes → Permits)

Method 2: Adding through security settings

A more general-purpose method is to use the Security section in your smartphone settings, which allows you to add numbers manually even if they've never called you before.

1. Open the settings (cog icon).
2. Go to the Applications → Lock (on some versions of MIUI, the path may be Settings → Memory and Applications → Lock).
3. Select the Blacklist.
4. Click Add the number (+ in the upper right corner).
5. Enter the number manually or select from the contacts, then confirm.

The advantage of this method is that you can manage the entire blacklist: delete numbers, view the history of locks, and adjust notifications, for example, you can turn on the option to Notify about blocked calls to see who tried to reach.

⚠️ Note: If you use two of these SIM-cards on Redmi 9, locking through security settings will act on both cards simultaneously. SIM, Use the method through the call log.

Method 3: Use of the "Contact" application

The third method is suitable for those who want to block the number stored in the phone book, which is convenient if you do not want to delete the contact completely, but you do not plan to communicate with it anymore.

1. Open the Contacts app.
2. Find the right contact and tap it.
3. Press three points (⋮) top-right.
4. Choose to Block Contact.
5. Confirm the action in the window that appears.

Once blocked through contacts, all calls and messages from this number will be ignored, while the contact itself will remain in the phone book, but next to it will appear a lock icon (🚫). This allows you to quickly unlock the number if necessary.

If you want to completely remove the traces of communication with a person, we recommend:

• 🗑️ Remove contact from the phone book
• 🧹 Clear the call history and SMS
• 🔒 Block the number through security settings (method 2)

Through the call log.|Through security settings|Through the “Contact” annex"|Third-party annexes|I don't block numbers.-->

Method 4: Third-party applications for extended locking

Built-in tools MIUI cover most needs, but if you need additional features (e.g., keyword blocking in the SMS Or automatically adding spammers to a blacklist, you should consider third-party apps.-3 Proven solutions for Redmi 9:

1. Truecaller detects spam calls and suggests blocking them automatically. ✅ Pros: large database of spam numbers, integration with contacts ❌ Cons: requires registration, sometimes shows advertising
2. Blacklist Plus – allows you to create lock rules on masks of numbers (for example, all numbers with a code) +375). ✅ Pros: flexible settings, no advertising in the paid version ❌ Cons: interface in English
3. Calls Blacklist – supports locking on a schedule (for example, only at night). ✅ Pros: simple interface, works without the Internet ❌ Cons: limited functionality in the free version

Before installing third-party applications, check:

• 🛡️ Availability of permissions to access calls and SMS (In Settings → Annexes → Permits)
• 📥 Compatibility with your version MIUI (Some applications may conflict with the shell)
• 🔄 Spam Numbers Base Updates (Relevant for Truecaller)

⚠️ Note: Call blocking applications can increase battery consumption by 5-15% because they are in the background. If you notice a quick battery drain after installing such software, check it in Settings. → Battery → Battery utilization.

How to check if the lock is working

Once you add a number to the blacklist, it's important to make sure that the system actually ignores it.

1. Test call: Ask a friend to call you from a locked number, you should not hear any sound or vibration, and you should not be notified of a missed call.
2. SMS Verification: Send SMS to your number from another phone (or online service) and the message should not appear in the Messages app.
3. Lock Log: Go to Settings → Lock → Log and check if communication attempts are recorded from the locked number.

If the lock is not working:

• 🔄 Restart your phone (sometimes helps reset the system cache)
• 📋 Check if the number has been added to the exception (in some versions) MIUI There is an option to Allow calls from the lock settings)
• 🛠️ Update the firmware to the latest version (in new builds) MIUI Corrected blacklist bugs)

💡

If the blocked number continues to bother you, try adding it to the blacklist through your mobile operator’s app (for example, “My Beeline” or “MTS Personal Account”), which will create a dual network level protection.

Frequent problems and their solutions

When you're working with a Redmi 9 blacklist, you're going to have a few common problems, and we've collected some of the most common and ways to fix them:

Special attention should be paid to blocking hidden numbers (where the number is displayed "Unknown" or "Private number"). On Redmi 9 with MIUI 14, you can do this:

1. Open Settings → Block → Blacklist.
2. Activate the option to block hidden numbers.
3. Confirm the action (a password or fingerprint may be required).

Note: Hidden number blocking can lead to missing important calls (e.g. from a bank or delivery service), as many organizations use hidden number protection to protect customer data.

How to manage a blacklist: Add, delete, backup

Over time, the blacklist can grow and accumulate numbers that are no longer relevant. To maintain order, use these tips:

• 📝 View the list: Go to Settings → Lockdown → Blacklist. This shows all the locked numbers with the date of addition.
• ✖️ Delete number: Tap the number in the list and select Delete. or use the Control button for mass removal.
• 🔄 Backup: B MIUI 13/14 You can save a blacklist to the cloud. Go to Settings. → The phone. → Backup → Local backup and select System Settings.
• 📤 Export/Import: Use apps like Blacklist Backup to transfer your list to another phone (available from Play Market).

If you plan to reset your phone to factory settings, make sure to keep the blacklist in advance. Once reset, all locks will be removed and you will have to reset them.

💡

Regularly (every 2-3 months) review the blacklist and delete numbers that no longer pose a threat, which will reduce the burden on the system and reduce the risk of missing an important call due to accidental lockdown.

FAQ: Answers to Frequent Questions