How to troubleshoot your Android smartphone

If you have never run a diagnostic test on your phone, it’s worth doing, especially if your smartphone has openly shows your age or if you bought the phone used and want to check its status. Diagnostics are also useful when your device suddenly start to function not as fast as before, but you can’t pinpoint why. Instead of guessing on a coffee thick, and to begin to repair the malfunction according to the method “in the process will understand what’s wrong with him”, it is better to carry out a diagnostic scan that can accurately determine what is happening with your smartphone, or at least provide a detailed list of data that will help to understand in which direction to move.

Unfortunately, the built-in search tools for diagnosis on Android smartphones can be a daunting task, and on some devices good diagnostic options simply do not have, if they even have. But you can always turn for help to third-party applications.

Built-in diagnostic tools

Most Android smartphones have a few simple diagnostic tools hidden in OS, but they differ depending on the device. These tools can be found by entering special codes in the dialer of your phone. Enter the following codes and diagnostic menu should open automatically.

Here are two basic code that can be used on most Android-smartphones:

  • *#0*# (hidden menu, diagnostics): some smartphones come with a complete diagnostic menu. From there you can run scans at least some hardware of the phone. However, this code is not available on all devices – for example, nothing happened when we tried this code on Pixel XL, although on the Samsung Galaxy S9 menu appeared. For those who have menu still appears, you’re in luck, as it is very functional and comfortable option of diagnosis. The menu offers a number of stand-alone tests to verify the performance of various parts of your phone such as screen (touch detection, accuracy), camera, sensor and physical buttons such as power button/lock and volume keys.
  • *#*#4636#*#* (menu usage information): this menu will be displayed on more devices than hidden diagnostic menu, but the General information will differ depending on the device. At least, you should see a usage history of the application; the statistics of connections to Wi-Fi and cellular networks in real time; and basic information about the phone, such as those used by the operator, telephone number and so on.

You don’t need to press the call button or something to open the hidden menu, they should just open automatically. If when you enter the code nothing happens, it means that your phone does not have this feature. Similarly, some devices do not provide this useful information, such as the aforementioned Google Pixel (which uses Google services to collect diagnostic information from your phone in the background). If so, and your smartphone does not support built-in diagnostic menu, then skip to the next paragraph where we told you about third-party tools to carry out diagnostics of mobile devices.


This application allows you to perform a quick assessment of your device and full hardware diagnostics on devices running Android. Full system scan performs a simple operation, which checks all the main hardware functions of your phone including the camera, battery and charging, sensors, precision positioning, Bluetooth and the cellular module.

Each test is fairly simple and the results easy to read. If during the scan detected that something is wrong, the app can give you a recommendation to visit the service center. The only drawback TestM is that it shows ads before each test that is sometimes annoying. Premium version without ads can be unlocked for $ 18, but it is, in my opinion, a very high price for this kind of application.

Phone Check and Test

Phone Check and Test is, at first glance, a very simple application can do much more than just check the health of hardware of your smartphone. A full scan involves a deep diagnosis of CPU, memory and battery, and indications of the test are very detailed. This makes the inspection and testing of the phone a little less user friendly than TestM, but it is a great tool for Troubleshooting, which gives you a lot of data.

Although the free version and contains advertising, it is not so annoying, and of course, you have the opportunity to get rid of ads by Plus version for only $ 2. The Plus version also adds some more tools for diagnosis and allows to run standalone tests for each hardware component separately, which saves time in the background full system scan.

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