17.
WI-FI is not working properly:
Solution:
Check WIFI 11 to 30 S if these are working fine
。
Flash the handset with latest SW
Check the WIFI antenna normally or not, then Re-Solder or change it.
Check the WIFI chip work normally or not, then Re-Solder CPU or change it.
Check the CPU normally or not, then Re-Solder CPU or change it.
WiFi&BT
ANT
CPU
WiFi&BT&GPS&FM
4 in 1 IC