How to use an application called Phone Doctor Plus that can be downloaded in the Google Play Store.
To check out your used Android with the app, follow these checking steps:
1. When finished downloading, open the Phone Doctor Plus app.
Phone Doctor Plus in Google Play Store
2. Once open will display the Summary page of the checked device.
3. On this page you can see the details of each category with a star rating system.
4. To check, go to the Check menu at the top.
5. Follow each test in the menu, from Outer Hardware, Sensor, Inner Hardware, and Connection.
6. If a green tick indicates a good condition, a yellow exclamation mark indicates no test passes, and a red cross does not qualify for that category.
7. If you do not pass in one category, try it several times. Because there is a possibility you are wrong in following the stages.
8. After you've done all the testing, you know how the old Android condition is.
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