I was able to successfully replace my flex antenna and now both my gps and WiFi work perfectly! I strongly recommend drawing a diagram on paper next to your .... Spotty signal on wi-fi? You may need to replace the upper wi-fi antenna in your iPhone 6. Tools.. Compare. Loud Speaker Ringtone Buzzer+ Wi-Fi WLAN Signal Antenna Flex Cable assembly Fix Replacement Repair Parts for iPhone 6S Plus 5.5 I..