Chosen Solution
I had to replace the lightning connector assembly on my iPhone 6 due to the lightning connector itself and the headphone jack wearing out. After doing so, I no longer have 3G or LTE signal. I checked my connections, and I believe that everything is properly connected. I do have an EDGE signal, and I can connect to WiFi without a problem. The new lightning connector also connects to my computer (charging the battery and allowing data transfer) successfully as well. Does anyone have any recommendations on where to begin looking for a bad connection or something damaged? Thank you.
Hey, try using another headphone jack assembly that is Known good to you, what i mean by that is use a part that you have seen working before and check and make sure that antenna cable is not faulty of broken.
