Contribution d'origine par : Tom Chai ,
This should not be related to the antenna. iPhone 6 has at least 2 antennas for cell signals and they work at the same time. One is the top band and the other is the dock flex with the bottom band. The lower RF coax cable from next to the battery connector goes into the dock flex and the flex is screwed down onto the band. If the phone just loses connection when the signal is not bad, usually it's more likely that the cell tower setup/SIM card/baseband firmware is the problem.