Xiaomi number detector: how to turn on and configure correctly

Xiaomi’s current MIUI-based smartphones offer built-in tools to identify incoming calls, but many users have difficulty activating them. The number detector allows you to see not only the phone number, but also the subscriber’s name associated with it — even if the contact is not saved in your notebook, a feature that works through operator databases (AON) and third-party services like Truecaller or GetContact.

In this article, we will discuss all the ways to enable the determinant on Redmi, POCO and Xiaomi flagship models (including Xiaomi 13/14, Redmi Note 12 and POCO F5). We will focus on the settings of MIUI 14/15, where the interface has changed, and also consider alternative solutions for cases when the standard determinant does not work, you will learn how to avoid typical errors (for example, a failure of sync with the operator base) and why some numbers may not display correctly.

What is a number detector and how does it work on Xiaomi

The number detector is a feature that matches the incoming phone number with a database of names and organizations. On Xiaomi smartphones, it is implemented through:

• 📡 AON (Automatic Number Identification – service of the operator (MTS, Beeline, MegaFon, Tele2), which transmits the name of the subscriber, if it is registered in their database.
• 📱 Local base. MIUI — The smartphone saves the history of calls and can pull up names from previous calls.
• 🌐 Third-party applications (Truecaller, GetContact) that use crowdsourcing databases.

It is important to understand that AON It only works for the same operator as yours. SIM-For example, if you have a MegaFon, the names of MTS or Beeline subscribers will not be displayed, and the function can be disabled on the operator side, in which case even the correct settings on the phone will not help.

Since MIUI 12, Xiaomi has integrated Truecaller support into its standard Phone app (in some regions), which allows you to see names even for firewalls, but requires you to sign up for the service and provide access to contacts.

Method 1: Enabling the determinant through MIUI settings

The most reliable method is to activate the built-in function in the phone menu. MIUI 13/14/15:

1. Open the Phone app (the tube icon on the home screen).
2. Tap on three points (⋮) in the upper right corner and select Settings.
3. Go to the Definition of the number (in some versions - Identification of the caller).
4. Activate the switch to show the names of the callers.
5. Below, select the data source: 📶 Operator network (AON) — for subscribers of your provider. 📖 Local database – call history and contacts. 🔍 Truecaller – if the application is installed.

After turning on, check the function: ask a friend to call you from another number (preferably the same operator).If the name does not appear, the problem may be in the settings. SIM-card-holder.

Make sure that SIM-card AON|

Check balance (some operators block service with negative balance)|

Restart your phone after changing your settings|

Try calling from another number of the same operator.

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Method 2: Configure through USSD-operator

If the detector does not work after the MIUI, perhaps a favor AON It's disabled on the operator side. Use it to activate. USSD-code:

After shipping. USSD-You'll get the commands. SMS If the service is paid (for example, on Tele2), your account will be charged subscription fee (usually ~3-5 rubles per month on MegaFon and MTS AON Free for most tariffs, but can be disabled by default.

⚠️ Note: Some corporate rates or virtual operators (e.g. Yota, Tinkoff Mobile) have a service AON Check if it's available from your provider.

Method 3: Using Third-Party Applications

If the built-in identifier fails (for example, does not show the names of subscribers of other operators), install one of the specialized applications:

• 🔍 Truecaller is the most popular solution with a database of billions of numbers.

After installing any of these applications:

1. In the settings of the Phone application, select it as the source for determining numbers (see Method 1).

Truecaller also has the ability to block spam calls and SMS, but you need to enable the appropriate options in its settings. Note that the application can consume traffic to update databases.

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If the names of the callers are not displayed after installing Truecaller, check that the source of Truecaller is selected in the MIUI settings in the Definition of the Number section, not the operator network.

Why the determinant doesn’t work: Typical problems and solutions

If after all the settings, the names of the callers are still not shown, check the following points:

Another common cause is application conflict, where if you have multiple determinants (like Truecaller + GetContact), they can block each other.

1. Leave one appendix.
2. Clear the cache of the Phone app (Settings → Apps → Phone → Storage → Clear the cache).
3. Reboot the phone.

⚠️ Note: Some Xiaomi models (e.g. Redmi) 9A or POCO M3) in the firmware for the Russian market function AON It can be disabled at the software level, and only installing a global or European version will help. MIUI (But it voids the guarantee!).

Additional settings: how to improve the definition of numbers

To improve the accuracy of the definition, use these tips:

• 🔄 Update Truecaller database: Go to the app, tap three dots → Settings → Update the database, which will help identify new spammer numbers.
• 📵 Add numbers to the blacklist: In Settings → Phone. → A blacklist can block spam calls that the determinant flags as fraudulent.
• 🌍 Enable data roaming (if calling from abroad): Some operators block AON In roaming. To avoid this, activate the option Data in roaming in the settings SIM-map.
• 🔒 Set up the display for hidden numbers: C Settings → Phone. → You can also turn on the option to show hidden numbers (not working on all operators).

If you make frequent calls to other countries, set regional bases for a determinant, such as Truecaller, which allows you to download country-specific packages in the app settings.

Security and Privacy: What You Need to Know

The use of number identifiers is associated with the transmission of your contact information and call history, and here are the key points to consider:

• 🔐 Truecaller and its analogues: These apps upload your notebook to their servers to match numbers. If you're worried, don't sync contacts in the app settings.
• 📡 AON from the operator: your provider sees which numbers are calling you, but does not share this information with third parties (under the Communications Act.
• 🚫 Hidden numbers: If the caller has hidden his or her number (Anonymous or Unknown), the caller will not be able to show his or her name – this is a technological limitation.

To minimize the risks:

1. In Truecaller settings, turn off the option to Share my data.
2. Regularly clean the call log in MIUI (Phone. → Journal → ⋮ → Clean the journal).
3. Use two-factor authentication for a Truecaller account (if you have linked mail).

Starting with MIUI 14, Xiaomi added the “Privacy Mode” option in the Phone app, which restricts third-party detectors from accessing your data. To enable it, go to Settings → Phone → Privacy and activate the appropriate switch.

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Third-party determinants like Truecaller are more effective than AON, but require access to personal data.

FAQ: Frequent questions about the number definition on Xiaomi