Chosen Solution
After replacing screen and battery on iPhone 6 when device reassembled it is not recognising SIM card, I have tried restarting and airplane mode
Might be a pain but when things like this happen to me after completing a repair. I start again, disassemble and carefully reassemble making sure all connectors are secure. 9/10 times it’s just something hasn’t been seated correctly. Try disassembling and re-assembling. As time consuming as it is, it helps you narrow down the issue by removing the ‘something isn’t connected right’ option. Let us know how you get on.
How to resolve NO SIM problem / SIM card problem iPhone 6
