2016-09-13, 12:54
To enter test mode, from power off hold the volume button and power button. One way should bring you to recovery, the other should bring you to test mode.
If it doesn't work, test your components using various apps that utilize them. For example, to test the mic, make a phone call or a sound recording with a recording app.
If it doesn't work, test your components using various apps that utilize them. For example, to test the mic, make a phone call or a sound recording with a recording app.