iPhone phones usually have a very long life cycle, so the second-hand iPhone market is always very busy. But how do you know if the iPhone you buy is still usable?
Some users think that the iPhone has some kind of built-in diagnostic mode, which is used to check the health of parts of the iPhone. It’s true that Apple has those tools, but they’re not part of the iPhone. So we have to rely on third-party apps out in the market.
There are many different tools, but perhaps the TestM application is still one of the most popular and offers the best quality. More specifically, this application is completely free.
The TestM app features insurance, sales and repair shop locating. In addition, the application does not display ads.
The application has 26 diagnostic modes, ranging from camera, touch, microphone tests to even touch mechanisms, full battery and heatsink related tests.
A full test can take up to 20 minutes and requires a lot of user interaction with the machine. For example, the application requires scrolling through each test, some tests related to speakers or touch operations. Remember this is not an app where you just push a button and leave your phone there to do something else. You will be involved in the whole process.
It’s a good app, it’s not perfect, but it can still work with parts that Apple allows. Moreover, you don’t have to spend a dime to be able to dig deep and check the condition of your iPhone before you buy it.
Source link: You should use this app to check your old iPhone before you buy it
– https://techtipsnreview.com/
