Which iPhones Will Boot With Top Board Only

Summary
When troubleshooting a board issue on a 2 layer sandwich board, sometimes it's a good idea to isolate the board to the bare minimum. That includes, splitting the sandwich & test with the top board only.

When testing with top board only or with a non-original bottom board, you may get a white screen that says "Swipe To Recover". This just means it needs to "reconfigure itself" with the new NFC chip it has detected. All you have to do is type in the correct pin code twice & let it do it things. It will have a loading bard with a "attempting data recovery" message.

If it goes back to the "Swipe To Recover" message, then it means the pin code was incorrect or the phone restarted.

When in doubt, test the top board with a known good bottom board in a socket jig tool, like a Qianli iSocket.

Top Board Only Useful Info
Below is a list of each sandwich model & what happens when you test with top board only