So ever since i dropped my phone a few times after i just got it, there are times where my phone will vibrate on it's own when i am not doing anything to it. I have turned off all vibration in my settings though, the only time it will vibrate is when it cannot recognise the fingerprint to unlock. It's not that serious that it affects my ability to use my phone because it just goes *zzz* for like one second but still i just got it a few months back and have to wait around 18 more months to recontract before i can get a new phone so im substantially worried. I googled and found a secret code *#808# where it will bring you to the engineer mode for you to test the sensors and a bunch of other stuffs. Under the 'vibrator test' one of the components actually failed the test and it says that 'primary mic disconnected' and hence test failed. Anybody is able to advise me on what's wrong with my phone? Any help will be greatly appreciated T_T