No Service or very weak signal on iPhone 4s
Hi, I was trying to change the cellular antenna that I found out the blue coil and another piece is missing (as you can see in the picture, ignore the red and blue markings). I just want to know, what exactly there parts do and is there any way to bypass them. I have read about the blue coil but I do not know much about the other tiny piece beside it. Anybody knows what it does? please help me, its urgent.
I tried to bridge the blue coil with a piece of wire (the other piece is still missing), the cellular antenna is back but when I trun on 3G it goes back to 1bar network. With 3G off it works just perfect but as soon as I turn 3G on the signal weakens. Any ideas?
Sam, the components that are missing are the inductor L47_RF with the values of 5.6NH+/-0.2NH-470MA and the second component is the capacitor C14_RF values of 33PF 5% package 01005NP0-C0G 16V. It is part of the transceiver circuit, and looking at the schematic of the location of the capacitor, it is easily possible that this is what gives you your troubles. I would definitely replace it. Hope this helps, good luck.