Owners of modern smartphones, especially popular models like the Xiaomi Redmi Note 9, often face alarming signs: the battery runs out too quickly, the device heats up in standby mode, or strange sounds appear during a conversation. All these symptoms can indicate that your gadget is under surveillance. In the digital age, the concept of “wiretapping” has expanded from classic interception of calls to sophisticated spyware that collects data about geolocation, correspondence and user actions.
The Android-based MIUI has powerful built-in security mechanisms, but not everyone knows how to use them properly. Disabling wiretapping on the Xiaomi Redmi Note 9 requires a comprehensive approach, from checking system settings to analyzing installed applications. Ignoring these steps can lead to leakage of confidential information, so it is important to act consistently and carefully.
In this article, we will look at proven methods for detecting and eliminating security threats, learn to distinguish between system processes and malware, use hidden engineering codes, and customize the privacy of your device. Remember that complete security is not a one-time action, but a constant process of controlling what permissions you give to various programs.
Symptom analysis and primary diagnosis of the device
Before we move into active cleanup actions, we need to clearly identify the problem. Often users confuse the background MIUI processes with viruses, but there are specific signs that can not be ignored.If your Redmi Note 9 suddenly began to consume a lot of traffic in the background or the screen spontaneously lights up, this is cause for serious concern.
One key indicator is abnormal battery behavior: Spyware constantly transmits data to a remote server, which leads to a sharp jump in power consumption, and it is also worth paying attention to how the phone behaves during a conversation: extraneous clicks, echoes or delays in sound can indicate a recording of a conversation by third parties.
⚠️ Warning: If the phone gets very hot even when it’s off or at minimal load, it could be a sign of a hidden miner or spyware using CPU resources.
For initial diagnosis, you can use a built-in Task Manager to show which applications consume the most power and traffic. Often malicious software masquerades as system services, so it is important to check not only the name, but also the amount of data transferred.
- 📉 A sharp drop in the autonomy of work without changing the usual scenario of use.
- 📡 Unexplained growth in mobile traffic consumption in the background.
- 🔊 Extraneous noises, clicks or changes in the voice of the interlocutor during calls.
- 📱 Spontaneously turning on the screen, flashing or launching applications.
Checking for call forwarding and hidden codes
One of the most common, but often ignored, methods of wiretapping is to forward incoming calls and SMS Unlike virus installation, this method does not require Android to be installed, as it uses standard operator functions. On Xiaomi Redmi Note 9, you can check and disable these settings through special devices. USSD-code.
Enter ##002# and press the call button. This universal request cancels all redirects (voice, fax, data) installed on your number. Once you complete the command, you will receive a notification from the network that the reset has been successfully reset, which is safe and does not affect other parameters of the phone.
It is also useful to use the *#21# code, which displays the current forwarding status of all call types. If you see a number other than yours or a "Redirect on" status, this requires immediate intervention. On Xiaomi devices, these codes work at the modem level, so they are effective regardless of the version of MIUI.
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After entering the redirect cancellation code, it is recommended to restart the device so that the network settings are applied correctly and updated in the profile. SIM-map.
There is also an engineering menu available through code ##4636##. You can talk about the phone here, but be careful: changing the settings in this menu without understanding the consequences can disrupt the radio module. To check the wiretaps, we only need the usage statistics section, where you can see if there was any suspicious activity.
Audit of installed applications and access rights
The most likely source of data leaks on the Xiaomi Redmi Note 9 is a malicious application that you could install yourself without noticing the trick. Often such programs disguise themselves as flashlights, memory cleaners or games. MIUI has strict rules, but some threats circumvent them by requesting excessive rights.
Go to Settings → Apps → All apps and look carefully at the list. Look for programs with weird names, no icon, or developer name. Pay special attention to applications that have access to the microphone, camera, and location. If a simple calculator requires access to your contacts and SMS, this is a clear sign of spying.
☑️ Checking suspicious applications
A crucial step is to check for special access. Many viruses require permission to "special features" to read text from the screen and simulate clicks. Go to Settings → Additional settings → Special features. If there is a service that you did not install or recognize, immediately turn it off.
| Type of application | Necessary rights | Suspicious rights | Action. |
|---|---|---|---|
| messenger | Microphone, Camera, Contacts | SMS, Geolocation (constant) | Check the settings |
| Game. | Warehouse (conservation) | Phone, SMS, Microphone | Delete |
| Lantern | No. | Internet, Contacts | Delete |
| Cleaning up memory | Warehouse | Device administrator | Check the developer. |
⚠️ Note: Some malware hides its icon in the launcher. Use the file manager to detect them. MIUI And sort apps by installation date to find recent suspicious ones APK-file.
Use of the built-in MIUI security scanner
The MIUI operating system, which is equipped with the Redmi Note 9, preinstalled a powerful application "Security" developed by Xiaomi and based on antivirus databases Avast and AVL. This is the first line of defense, which is often ignored by users, preferring third-party solutions that may be less optimized for MIUI.
Run the Security app and select the Antivirus function. Before you run the check, make sure that the databases are updated, the system will prompt you to do this automatically. The scanning process will check all installed applications, system files and installation packages for known virus and trojan signatures.
In addition to virus detection, this section has a "Resolves" feature, where you can see which apps have accessed the camera, microphone or files in the last 24 hours, and if you see an application you haven't used accessing the microphone, it's a signal that you might be tapping, and it allows you to instantly revoke those rights.
Why is an antivirus better than a third-party?
If the scanner detects a threat, it will offer options: remove, quarantine or ignore. If a Trojan or spyware is detected, it is recommended to choose a complete removal.
Radical measures: data dumping and cleanup
If software methods have failed to eliminate the signs of wiretapping and suspicions remain high, the only guaranteed way is a full factory reset, which will delete all data from the Xiaomi Redmi Note 9 internal drive, including hidden viruses that may have infiltrated the system partition.
Before starting the procedure, be sure to back up important contacts, photos and documents to the Mi Cloud or your computer. Please note that it is better not to back up applications, since you can also restore the infected file with them.
To perform the reset, go to Settings → About Phone → Settings Reset → Erase all data. The system will request confirmation and entry of the unlock password. After that, the formatting process will begin, which will take a few minutes. The phone will return to the state in which it was immediately after purchase.
Settings → About the phone → Reset settings → Erase all data⚠️ Warning: After reset, do not restore apps from the old backup immediately.Install only proven programs from Google Play to avoid returning the virus back to the clean system.
Once turned on, the phone will suggest reconfiguring your Google and Mi Account account, which is ideal for setting a strong password and enabling two-factor authentication. Clean system installation is the only way to ensure that complex rootkits that lurk deep in the system are removed.
Prevention and Configurement of Privacy
After successfully removing a potential threat, it is important to secure the result with the right security settings. The Xiaomi Redmi Note 9 has a Privacy Protection feature that allows you to mask the content of notifications on a locked screen. These are prevents outsiders from reading your messages.
Update your operating system regularly. Xiaomi releases security patches that close Android vulnerabilities that hackers can access your device through. Go to Settings → About Phone → MIUI Version and check for updates. Automatic updates are best kept on.
- 🔒 Set a complex password or pattern lock, avoid simple combinations like 1234.
- 🚫 Disable the installation of applications from unknown sources in the security settings.
- 🌐 Use reliable Wi-Fi networks and avoid public access points without encryption.
- 👁 Periodically check the microphone and camera access indicators in the status bar.
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Regular system updates and failure to install APK-Files from unverified sources reduce risk of infection by 95%.
You should also pay attention to in-system advertising, and while it's not direct wiretapping, aggressive advertising is often a sign of having adware that collects your preferences, and in MIUI settings you can turn off ad personalization, which will increase your overall privacy.