How to permanently disable auto-response on Xiaomi 9C: 5 proven ways

Automatic call response is a useful feature, but only when you really need it. Xiaomi Redmi 9C owners often experience a situation where the smartphone itself sends SMS or voice messages to subscribers without their knowledge. This can occur due to firmware failures, incorrect settings or activation of operator services. In some cases, autoresponse interferes with work — for example, when you are at an important meeting or sleeping, and the phone continues to “communicate” with subscribers.

You can disable this function in several ways: through standard settings. MIUI, assisted USSD-It is important to understand that the sources of the problem are different: sometimes the fault of the smartphone software, sometimes the services of the mobile operator (for example, Voicemail or Self-Secretary). We will analyze all options, including hidden settings and nuances for specific versions of firmware.

If you notice that the Xiaomi 9C is answering calls or sending SMS without you, don't panic. 90% of the time, it's solved in 5 minutes. The key is to correctly identify the source of the problem and apply the appropriate method. Let's start with the simplest and gradually move on to more complex solutions.

1. Checking the standard MIUI settings

The first thing you need to do is look at the smartphone settings menu, and MIUI has built-in auto-response functions that can be activated accidentally or after a system update, and here's how to find and disable them:

Open the Settings app (the gear icon on the home screen) and go to the section:

Settings → Applications → Call → Autoresponder

If there is no such item, try an alternative path:

Settings → Additional → Special features → Auto-response to calls

In this menu, you will see switches for different types of automatic responses:

• 📞 Voice answering machine – records a voice message if you can’t respond
• 💬 SMS-Auto-response – sends a text message when a missed call is made
• 🔄 Auto-Redirect – Redirects calls to another number

Turn off all the sliders and restart the phone, and if you keep getting auto-response after that, it's a deeper problem, maybe it's the settings that are to blame. SIM-card-fix.

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If you don’t have “Appealer” on your menu, upgrade to the latest version of MIUI. Older versions (below 12.5) may not have this section.

2. disconnecting the operator's services through USSD-team

Mobile operators (MTS, Beeline, MegaFon, Tele2) often connect paid auto-response services without the user's knowledge. These services can work even if everything is disabled in the smartphone settings. USSD-team:

Open the Phone app and enter one of the commands depending on your operator:

After you type in the command, you will receive an SMS confirming the shutdown, and if the service was active, you will see a notification such as: "Service 'Autoresponder' deactivated. Cost 0 rub / day." Save this message - it will be necessary if the operator tries to re-connect the service without your knowledge.

⚠️ Note: Some operators (e.g. MTS) may reconnect the answering machine after the tariff update. 2-3 month-long *111# (for MTS) or similar to other operators.

3. resetting network settings and SIM-map

If previous methods have failed, the problem may lie in incorrect network settings. resetting communication parameters often solves the problem with spontaneous autoresponse, especially if they began after a firmware update or change. SIM-map.

Follow the following steps:

1. Open the Settings. → SIM-maps and mobile networks
2. Choose yours. SIM-card (if there are several)
3. Click Network Settings Reset (or APN Reset)
4. Confirm the action and restart the phone

Once rebooted, the smartphone will automatically load the correct network settings from your carrier, a method that helps in 60% of cases where autoresponses are caused by a failure in APN settings or a conflict of communication protocols.

Write down the APN settings (if you use non-standard ones)

Make sure you know. PIN-code SIM-map

Connect to Wi-Fi (after reset, mobile Internet may not work)

Make a backup of contacts (in case of failure)-->

⚠️ Note: After resetting the network, you will have to re-enter the Internet settings (APN), If you have used non-standard parameters (for example, for corporate purposes). SIM-The standard operator settings will be automatically restored.

4. Verification of third-party applications

Many Google Play apps have SMS permissions and call management rights, and users often install spam blocking, autoresponder, or business messaging apps that send messages in the background, and here's how to find and disable these apps:

Go to:

Settings → Applications → Application Management → Application Rights

Then select:

• 📱 SMS — See which programs are allowed to send messages.
• 📞 Phone – Check apps with access to calls
• 🔄 Autostart – Disable autostart for suspicious programs

Pay special attention to applications of the type:

Truecaller (can send automatic spam responses)

GO SMS Pro (has a built-in answering machine)

Business Call Recorder (records calls and can send notifications)

Any app with the word "Auto" or "Reply" in the title

If you find a suspicious application, revoke its license or delete it altogether.

Settings → Memory → Clean the cache

5. Update firmware and reset to factory settings

If none of the previous methods worked, the problem may be in the firmware Xiaomi 9C. In some versions of MIUI (especially 11 and 12) were bugs with the telephony module, which caused the smartphone itself to send answers to calls.

Check the relevance of your firmware:

Settings → About the phone → System update

If you have an update, install it. After the update, reset to factory settings:

1. Make a backup copy of the data (photos, contacts, messages)
2. Go to Settings → Additional → Recovery and Reset
3. Select Resetting and confirm
4. After restarting, set your phone as new.

It's radical, but it's effective, and 95 percent of the time, after a reset, the problem with the auto-response disappears, and even if it doesn't work, it's a hardware problem, like a communication module malfunction, and you need to go to the service center.

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Factory reset removes all data from the phone, including photos and apps. Always back up before resetting!

6.Alternative methods: engineering menu and ADB

For advanced users who are not afraid to “dig” in the system settings, there are two additional ways to disable autoresponses: through the engineering menu and the user interface. ADB-These methods require caution, because doing the wrong thing can disrupt the phone.

Method 1: Engineering menu

1. Open the phone application
2. Enter the code ##4636##
3. Go to the tab Phone Information
4. Scroll down and find the option to disable auto-answer (could be called Auto Answer Disable)
5. Set the value Off and save

Method 2: ADB-commands (requires PC and enabled debugging on the USB)

1. Connect your phone to your computer and enable USB debugging in the developer settings
2. Open the command line on PC and type: adb shell settings put global auto_answer 0 This will disable all types of auto-response at the system level.

⚠️ Note: Changes to the engineering menu may cause the communication module to work in an unstable manner. If the network signal is lost or calls stop working after the changes are made, reset the network settings (section 3 of this article).

Frequent questions about auto-answers on Xiaomi 9C