You have some issues and not understand if is a software issue or an hardware issue?
you want to buy an used iPhone and want to be sure it works?
this app is what you need! a full checkup for hardware of your phone!
we have live sensor status and specific tests for you!
This app execute a complete sanity checkUp for all hardware/sensors of the iPhone
The App check up hardware sensors and components for your Phone test sections:
Battery.cpu= this test street your cpu and other components (GPS, storage) to test the efficiency of battery, based of the drain of battery during test we can have an indication of battery health
this test prove also the status of your cpu (we simulate a enforce similar to big 3d game), if your phone complete the test have a good status cpu/battery
Camera.display= this test check the status of display and camera, its very fast test, it shot also a photo (not saved).
Touch id: for the device that have it, test the touch id in HOME button
RAM/Hd storage/networks; this is a complex test the stress the networks modules, the RAM and at the end the storage. based on time of test we can understand the efficiency of RAM and storage, if you complete the test the networks-RAM-hd on your iPhone are ok.
Push Test : test the push notification functionality
Video Streaming: test the video high quality streaming
Key and volume test: test the key volume up/down and the home, test the speakers status with some specific sound tests
GPU/CPU stress test: this test stress the CPU/CPU with some video graphical elaboration, you can check the smooth of animation and fps
note:
this app is for IOS 10 and optimised for iPhone 6/7 family, works fine also with iPhone 5 family not suggest for iPhone 4