Chosen Solution
What is the antenna ribbon for?
As far as I know there are only two antenna cables in this phone which plug the main logic board antenna connectors to the sub daughter board’s antenna connectors. Those are responsible for cellular signal 3G/4G. I think the wifi and GPS ones are located at the upper section of the logic board. Then there’ll be little gold prongs on the boards which connect to the mid-frame antenna circuitry which is made of of 2-3 removable plastic antenna covers which also house the wireless charging coil.
