How to thoroughly check old iPhone before buying

If you are new to trying to use iPhone but do not want to invest a large amount of money, users can choose to buy the iPhone launched a few years ago, or buy a used device. The fact that Apple still supports the latest iOS operating system on iPhone models released 4-5 years ago makes the experience on the old machine still enough satisfied.

While there are many tips to check out your old iPhone before making a buying decision, if you don't have a lot of experience and are prone to being deceived by your appearance, you will soon regret it. This article will provide you with a suggested application that will help you thoroughly examine the iPhone you intend to buy, thereby giving you a quick assessment and advice on whether to buy it or not.

As follows:

Go to App Store, find and download TestM app.

After downloading, please start the application and login to your account to use.

TestM interface is quite simple, includes 4 main tabs, but mainly 3 tabs are Insurance, Trade-in and Diagnostics.

In general, the app will do the device test and give you a quick report on the status of the device.

This process will ask you to give the app permission to use the device's hardware functions.

And it also prompts you to follow in order to make testing the machine easier.

The test steps are quite detailed, and you will be provided with the application specific operational requirements during the test.

Following the test steps is quite helpful and you should not skip any steps. This is for your benefit.

After completing the test, the application will give you a summary report. TestM is an application that works quite well, allowing you to see more clearly about the device's status and the operation of the internal components before deciding to buy.

Hope this app will be useful to you.