Fifth generation of iPhone. Repair of this device is straightforward, and requires screwdrivers, prying tools, and patience. GSM/CDMA / 16, 32, or 64 GB / Black or White.

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Signal loss - logic board


I have a problem with my iPhone 4S. After trying to replace my battery i accidentally popped off a coil on the logic board. The link below show a picture of the logic board (yellow arrow is pointing to the part that i popped off)


Is it true that this is a RF coil? My signal is very volatile and changes between No Service and full signal at the same location. Is it possible to fix this? I do have the coil but have non experience with solder.

Thanks a lot!

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Chosen Solution

Michael, your yellow arrow points to reference designator J4_RF which is a MS-180 RF Connectors / Coaxial Connector manufactured by Hirose Connector. It is not a coil, but nevertheless you will need to reconnect it. Check the datasheet on here, it will show you how and where the solder points are. Hope this helps, good luck.

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