Problem with wifi signal level after repair (changing LCD display)

With little documentation out there, and not having that specific model on me I looked at a couple of teardowns and images of the parts. There is two antenna's I can see on the mid frame (rear housing). One near the top, the other near the bottom. The larger of the two will most likely be cellular.

There is also a possible antenna on the LCD flex cable. I would generally think its a IC but from lack of traces leading to it, just can't be.

As for the GPS, antennas are usually in the controller for it.