Where is the gsm antenna in iphone 6s plus? I have no reception on 4g signal outside my house and I can receive only 2g signal. I have another iphone 6s plus that is able to receive 4g signal in the same point with the same operator.
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The antenna is the whole top and bottom bezel of the phone along with the dock flex and a few of the flex cables and screw posts on the board and the upper case.
There is no way to isolate just one radio feature as they are all designed to be integrated.
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