A modern smartphone has long been a digital passport of the owner, storing huge amounts of information about everyday life. For users of Xiaomi devices with MIUI shells or the new HyperOS, the issue of controlling this information becomes especially important. Parents want to know what children are doing online, and owners of used gadgets check the device for hidden traces of use by the previous owner. Understanding where exactly digital traces are stored allows not only to secure their data, but also to optimize the system.
There are several layers of logging in Android, which runs Xiaomi smartphones. It's not just a browser history, but also detailed reports on background processes, traffic consumption, and even sensor usage. Many users don't even realize that their phone keeps a detailed event log that can be accessed by regular means. In this article, we'll look at all the available ways to analyze activity, from simple methods for beginners to advanced tools for technical specialists.
Don’t underestimate the importance of regularly checking your history, helping you identify malware that can mine cryptocurrency or steal passwords in the background, and analyzing activity helps you understand which application drains your battery the most, even if it’s not running in an active window, and we’ll look at how to interpret the data and what steps to take if you detect suspicious activity.
Analysis of screen usage and running applications
The easiest and most affordable way to find out what was happening on a smartphone is to look at the built-in usage statistics. Android automatically collects data on the time spent in each application and the time of screen turn on. To access this information, you need to go to the Settings → Digital Well-being and Parental Controls menu, and here you open a detailed chart showing activity by day.
In the Usage Data section (or Device Usage), you'll see a list of all installed programs sorted by time. When you click on a particular application, you can see the detail of how many times it's been launched and how long it's been in the foreground. This is key, because background activity may be different from what you see, and if you see that calculator running 5 hours a day, that's a clear cause for concern.
The MIUI and HyperOS shells feature an extended battery report that often duplicates activity data but is power-driven. Go to Settings → Battery → Statistics. You can see not only the time you run, but also the number of wakes you wake up the device up. A high wake-up counter on a underutilized application often indicates code malfunction or hidden mining.
⚠️ Note: Data in the Digital Well-being section can be reset manually or automatically by the user when the system application data is cleaned.
For a deeper analysis, you should look at the time stamps, and if the phone was in your pocket, and the statistics show that you're using a navigator or a voice recorder, it's a sign of random tapping or sensor failure, and regular monitoring of these indicators helps keep your digital hygiene in order.
☑️ Checking application activity
Checking the history of Internet connection and traffic
Internet activity leaves some of the most visible traces in the system. Even if the browser history has been deleted, system logs can store information about which applications accessed the network and how much data they transmitted. In Xiaomi smartphones, the built-in traffic monitor is responsible for this. Go to Settings → Connection and Sharing → Data Transfer → Statistics.
This section shows the amount of data transferred over Wi-Fi and mobile network for each application. Anomalously high traffic from a program that should not consume it (for example, a flashlight or voice recorder) is a red flag. This may indicate the transfer of your personal files to a remote server or the operation of an advertising module.
It's important to distinguish between traffic types. Background data is often hidden from the user's eyes, but it allows messengers to receive messages and update mail. However, some unscrupulous applications can use this to download updates or mine. In data settings, you can not only look at statistics, but also completely ban background activity for suspicious programs.
For Xiaomi routers or advanced users, even more detailed information is available through the router’s logs, but this is an external level of control. The internal tools of the smartphone provide enough information for initial diagnosis. Pay attention to the dates: if traffic was transmitted while the phone was locked and lying in another room, this is an excuse to conduct a deep security check.
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Use the Traffic Saving feature in your settings to automatically block background data transmission for applications that don’t need it, and it will also help identify programs that are trying to get around the restrictions.
Detailed log of calls and network activity
Call logs are a classic way to track activity, but they have their own features in modern smartphones. The standard list of incoming and outgoing phone apps can be cleared, but system logs often store information longer. Android 13/14, which is the basis for new versions of HyperOS, has a feature called Network Access and Calls in its privacy settings.
Go to Settings → Privacy Protection → Network and call access (the path may vary slightly depending on the version of MIUI) Here, the system shows in real time which application is currently using a microphone, camera or contact access, which allows you to catch the spy as he tries to read the information.
It's worth checking the history. SIM-In some cases, telecom operators provide details of calls and SMS It's an external source of information, but it's often the most reliable when checking for activity on a device that's been in the wrong hands.
Telegram, WhatsApp and Viber store the history of sessions. Going to the security settings inside the application itself (section "Devices" or "Active sessions"), you can see from which IP-If you see an unfamiliar device, immediately terminate this session and change your password.
| Type of activity | Where to find out | What to pay attention to | Risk |
|---|---|---|---|
| Screen time. | Digital well-being | Applications without icons or system processes | Hidden mining |
| Traffic. | Settings → Data transfer | Background transmission at night | Data theft |
| Account sessions | Settings inside messengers | Unfamiliar IP or device models | Account hacking |
| Access to sensors | Privacy indicators | Turning on the camera/microphone without running applications | Espionage |
System Logs and Advanced Diagnostics
For users who want to dig deeper than standard settings, there are system logs. MIUI has a Bug Report app that records all the system's actions. However, reading these files requires special knowledge or decryption programs. The more affordable way is to use developer mode.
Activate Developer Mode by tapping the build number seven times in the About Phone menu. Then go to Settings → Additional Settings → For developers. Here you can find a log of bugs and running services. The Running Services section will show which processes are active right now and how much RAM they are consuming. The presence of strange processes with names consisting of a set of letters often indicates malware.
Another powerful tool is ADB (Android Debug Bridge), which, by connecting the phone to your computer and installing the drivers, you can unload the full log of the system with the adb logcat command, which is a real-time data stream that records every action of the system, and filtering this flow by keywords (e.g., "install", "permission", "network"), you can see hidden activity that the standard menus will not show.
⚠️ Attention: Use ADB And you need to be careful about changing your settings in developer mode. Don't turn off system processes that you don't know what they're doing, and that can cause your phone to run in a very unstable way.
How to read logcat without a computer?
Parental control and location tracking
If the purpose of checking activity is to monitor children or elderly relatives, regular Android tools may not be enough. Google offers a built-in Family Link solution that integrates perfectly into the Xiaomi ecosystem. By installing the app on a child's phone and linking it to your account, you get a complete picture: which apps were installed, how much time was spent on each of them and where the device is located.
Unlike covert espionage, Family Link works transparently, a child sees that their phone is being monitored, and can't just delete an app or turn off the internet without notifying a parent. This fosters digital responsibility. In an app, you can set time limits for specific categories of apps, like limiting games or social media.
You can also use Google's Find Device service or Xiaomi's built-in phone search feature (Mi Cloud) to track location, which shows your travel history if geolocation was enabled. Accuracy depends on quality. GPS-signal and the availability of the Internet, but for a general understanding of the route of movement it is enough.
It is important to keep in mind the legislative side of the issue: Installing hidden spyware on another adult's phone without their consent is illegal in many countries, and use control tools only within the framework of law and ethics, primarily to protect children or your own devices.
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The most effective and legal way to monitor your child’s activity is to bundle accounts through Google Family Link, not install hidden Trojans.
Safety and removal of activity traces
Once you've studied the activity, you may need to clear the device of traces or, conversely, protect it from someone else's viewing. To clean up the history in MIUI, use the built-in Security utility. Click on the Clean button, select data types (cache, browser history, temporary files) and start the process. This will remove surface traces, but will not affect system logs.
To completely clean up the data, for example, before selling a phone, a normal reset is not enough. The data can be restored. It is recommended that before resetting the phone memory with useless files (big videos, archives), and then reset again, this will make it difficult to restore information with special utilities.
To protect your phone from prying eyes in the future, set up biometric protection and use the “Second Space” in MIUI. This is a feature that creates an isolated environment in the phone with its own set of apps and passwords. Activity in the second space is not displayed in the main profile, which provides a high level of privacy.
Regularly update your security. Xiaomi regularly releases patches that close vulnerabilities through which attackers could access activity history. Check the updates in the Settings menu → The phone. → Version. MIUI/HyperOS.