Keyboard Related Faults
Key(s) do not work, Poor Fitting problem, Backlight problem, No tone, Mechanical broken.

Audio Related Faults
No outgoing / incoming , low tone, noise cracking, No ringer, No music, Speaker not working etc

Vibrator Related Fault
Vibrator not working, vibrates continuously, mild vibrate

Camera Related Faults
Front/Back Camera not working, blurred picture, Camera on standby, mechanically broken

Buttons Related Faults
Side button, home button, volume button, on/off button, silent button etc

FM / Bluetooth related faults                              
FM not working, Bluetooth not working, bluetooth not getting connected

Display Related Faults
Broken Display, No display, Display flickering, White light, Lines on display, Black spots on display etc.

Network/SIM Related
No network, Low network, Call drops, SIM rejected, SIM not detected, SIM tray broken

Does not switch on
No Power On, Completely dead, Red light blinking

Battery/Charging Related faults 
Battery Not charging, Battery drain fast, Re-connect charger even when charger connected, does not stop charging, battery overheating

Handfree / Memory Card Related Faults
Handsfree not connecting, handsfree connector broken, memory card not reading, memory card not detected

Touchpad Related
Touchpad not working, touchpad malfunction, Touchpad Broken, Touchpad not working in some portion