测试你的手机的硬件组件,并告诉你,如果它工作正常
If you drop your phone, first thing you do, you pick it up. then you want to know if everything in your phone is all right. at this stage you can always run "Diagnose My Phone" so it will go through different components of your phone, checks the functionality of every components and tells you if there is anything wrong with it.