How to completely disable wiretapping on Xiaomi Redmi Note 7: from resolutions to hardware solutions

Introduction: Myths and Realities of Android Listening

Owners of Xiaomi Redmi Note 7 smartphones often wonder if their device can be bugged without the user’s knowledge, a topic surrounded by myths, from theories about “embedded backdoors” in MIUI firmware to rumors that the manufacturer allegedly transfers data to Chinese intelligence agencies. In practice, most cases of “wiretapping” are not associated with hardware bookmarks, but with uncontrolled application permissions, software vulnerabilities or malicious software.

It’s important to understand that modern Android smartphones (including Xiaomi models) can indeed become a surveillance tool, but only under certain conditions: for example, if you installed an application from an unverified source that requested access to a microphone, or if the device was hacked through a phishing attack. Another common reason is pre-installed services (such as com.miui.analytics), which collect data to improve the user experience, but sometimes do so too aggressively.

In this article, we'll look at specific methods to check for suspicious activity in the Redmi Note 7, disable microphone access for unnecessary applications, and minimize the risks of wiretapping. No conspiracy theory, only technical solutions that you can apply right now.

Step 1: Verify application permissions to access the microphone

The first thing you need to do is audit permissions, and many apps (even legitimate ones) request microphone access to enable voice functions, but not everyone really needs it, like why does a text messaging app need a microphone? Or why does a Candy Crush game ask for permission to record sound?

To check and disable unnecessary permissions:

1. Go to Settings → Applications → Permissions → Microphone.
2. Look at the list of apps that have microphone access, and look at the ones that you don't use for voice calls or audio recording.
3. Turn off the switch for suspicious apps, for example, if you don’t use voice search on Google, you can turn off access for the Google App app.

Pay special attention to applications with Chinese names (e.g. com.xiaomi.midrop or com.miui.cleanmaster). Many of them are part of standard MIUI firmware and can collect data for analysis. If you don't use these features, feel free to revoke permissions.

Disable access for underutilized applications|View system services (e.g. Mi Analytics)|Remove applications with suspicious permissions|Check the permissions after updates-->

Step 2: Finding and Removing Spyware

If you suspect that your Redmi Note 7 has spyware installed, you should do a thorough check.

• 🔋 Unexplained increase in battery consumption (even in standby mode).
• 📶 Suspicious network activity (traffic is consumed when you are not using your phone).
• 🔊 Extraneous sounds during calls (interference, echoes, clicks).
• 📱 Spontaneous microphone activation (record indicator burns for no reason).

To look for malware:

1. Install a well-reputed antivirus (like Bitdefender or Kaspersky) and run a full scan.
2. Check the list of installed apps in Settings → Apps → All apps. Look for programs with unknown names or those you haven’t installed.
3. Use the ADB tool (Android Debug Bridge) to check running processes. Command to output active services: adb shell dumpsys activity services Look for suspicious names in the output, for example, containing the words spy, monitor, recorder.

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If you find a suspicious application but can’t delete it (the Remove button is inactive), try first disabling it in the device administrator settings: Settings → Passwords and Security → Device Administrators.

Critical information: Some MIUI firmware for Redmi Note 7 features the system application com.miui.analytics, which sends device usage data to Xiaomi. It can not be deleted without root rights, but you can limit its activity by turning off background work in the battery settings.

Step 3: Set up MIUI security to minimize risks

MIUI firmware has several built-in features that can be used to protect against wiretapping:

Note the dual app feature (Settings → Apps → Dual apps). If you use a second instant messenger account (like WhatsApp or Telegram), make sure the duplicate app doesn’t have access to the microphone if you don’t use it.

Yes, deleted a few times | Yes, but I wasn't sure they were malicious | No, never checked | No, my phone is clean-->

Step 4: Hardware methods of protection against wiretapping

If the software doesn't convince you, you can use hardware solutions, which are more radical, but they guarantee 100% protection against unauthorized access to the microphone.

• 🔇 Physical microphone shutdown: On the Redmi Note 7, the main microphone is located at the bottom of the case (near the connector). USB-C). It can be gently turned off by disassembling the device, but it requires skill and risks voiding the warranty.
• 🛡️ Using microphone lock cases: There are special cases with metallized mesh that screen sound waves, such as cases from Faraday or Silent Pocket.
• 🔌 Turn off microphone via engineering menu: Enter code ##4636##, go to Phone Information and check microphone status. In some firmware here you can turn it off software.

Warning: Disassembling your phone without experience can damage your plumes or contacts. If you're not sure about yourself, you should contact a service center. Also remember that turning off the microphone will make it impossible to make calls and use voice assistants.

Step 5: Alternative firmware and custom solutions

If you’re willing to take drastic measures, consider installing custom firmware. LineageOS or Pixel Experience, for example, lacks pre-installed Xiaomi services and offers more control over permissions.

Advantages of custom firmware for Redmi Note 7:

• 🚀 Absence of Bloatware (unnecessary system applications).
• 🔒 More stringent privacy settings.
• 🔄 Regular security updates (as opposed to outdated ones) MIUI old-model).

However, there are risks:

• ⚠️ Loss of guarantee.
• ⚠️ Possible bugs (e.g., a broken module) NFC camera).
• ⚠️ Difficulty of installation for beginners (requires unlocking the bootloader and TWRP).

If you do, follow the official instructions from the XDA Developers forum for Redmi Note 7.

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Installing custom firmware is the most reliable way to get rid of the built-in MIUI trackers, but it requires technical skills and can lead to data loss.

Step 6: Additional security measures

In addition to turning off the microphone, we recommend taking other measures to protect privacy:

1. Use a VPN (like ProtonVPN or Mullvad) to encrypt traffic, which won’t protect you from wiretapping through a microphone, but will prevent you from intercepting voice messages in instant messengers.
2. Turn off the Google Assistant (Mi AI) and they're constantly listening to the environment while waiting for the command, which creates additional risk.
3. Update your software regularly. New versions of MIUI and Android are closing vulnerabilities that could be exploited by spyware.
4. Check your device for root access. If you haven't installed Magisk or SuperSU, but the Root Checker app shows you that you have superuser rights, your phone is hacked.

Attention: ⚠️ Some bug-checking apps may themselves be spyware. Don't install programs like Anti Spy Mobile or Spy Detector, which often contain advertising modules or collect data.

Frequently asked questions