Chosen Solution

My 6 plus works fine on wifi. When I install my sim, it realizes that it is an ATT sim, but the network status in the settings reads “Not Available”. I have done all suggested troubleshooting techniques I could find online including resetting network setting, restoring phone, and checking carrier settings. I even took the phone apart to check for broken antennas, but everything looks fine. I am now considering replacing the logic board with hope that it will fix the issue. Does anyone have any other suggestions or have had this issue?

I just went through this on 2 iphone 6’s this last month. Both had different reasons. 1st was a bend in phone that caused a solder break in the Sim Card Tray. It recognized the Verizon Sim card but Searching “No Service”…Had to touch up the solder connections (Difficult due to all the plastic), 2nd was a unknown cause…Bought from Ebay…tried about everything I could think of and ended up reballing the Baseband chip and it came back to life :) No more searching. Repair is extremely difficult, I tore a couple pads and had to make jumpers…if this is the problem which is unlikely (I just tried because I tried everything else with nothing to lose), it will take alot of skill for repair. Best of luck!

Thank you very much for the answers! I have yet to try reballing the baseband chip, but i am going to assume that it the answer. I am going to give it a try sometime in the near future. If it’s not the issue, then i wont be too upset, i only spent $50 on it and i can use the rest for parts. Great suggestions everybody!