Some iPhone 6 and iPhone 6 Plus users complained that their iPhone WIFI is unavailable, such as it can't connect to WIFI or WIFI signal is bad. This failure is causing them a lot of trouble. If your iPhone doesn't have enough cellulal data, and you can't use WIFI, they you can't use iPhone to surf the internet or you need pay. In a word, use phone repair tool to repair it is the best choise.
Trouble cases
1. If the iPhone suffers from water or falling damage, the PP_VCC_MAIN voltage it easy to disconnection and it cannot be reached to WIFI.
2. The resistance R5208_RF is easy to corrode after water damaged and then cause no WIFI issue.
3. Damaged capacitor C5201_RF and inductance L5201 can cause no WIFI and auto reboot failure.
Repair Guide
1. iPhone No WIFI
Carefully disassemble the iPhone by phone opening tools, remove the iPhone motherboard and check it, there are no obviously scars. Measure the C5202_RF with Fluke 15B+ Digital Multimeter to check whether there is 3.8V voltage, if not, use QUICK 861DW hot air gun to weld a jump wire from other side to C5202_RF. Measure the C5204_RF to check whether there is 1.8V, if not, make a short connection on R5208_RF. Check and replace L5201_RF, C5201_RF, replace iPhone module IC.
2. iPhone weak WIFI signal
If the iPhone 6 or iPhone 6 Plus can connect with WIFI, but the wifi signal is weak, we need to check iPhone wifi antenna first. You can fix it by replacing filter FL5201_RF, and replace iPhone WIFI module.
3. iPhone auto reboot
When the iPhone has no WIFI, and iPhone is on standby, then you can wake up it anumore. In this case, you need to hold the Power button and iPhone home button simultaneously to hard restart it. And you need to fix the damaged iPhone WIFI module IC.
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