iPhone XS Max iPhone max sim issue?


macrumors 68020
Original poster
Jun 20, 2010
i just noticed my phone and watch weren’t connected so I rebooted both. When I did that...I got an invalid sim message from my max. It still says ATT which is the carrier for the phone but on the left it says invalid sim And on the right under the LTE bars it looks like it is scanning for a connection. Is that my other sim? The phone did make a phone call to my other phone so it seems to be work.



macrumors 6502
Jun 15, 2010
I had this issue when I first inserted my old sim from my iPhone X into my new iPhone Xs Max. I ignored the pop up and kept moving along with setup. I did this because it said AT&T in the upper corner and seemed to be working even though the message popped up. The message hasn’t come up again since.
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