Blu Studio J1 - Wireless and Audio Faults

Start
Update new software or
Resetting factory
No
Check antenna and its
contactor
YES
OVER
Replace Main PCBA
YES
Change Antenna of contactor
No
GPS/BT/Wi_Fi issue
No ringtone
Start
Update new software or
Resetting factory
No
Check Speaker is ok or
not?
YES
OVER
Replace Main PCBA
YES
Change speaker
No