SOS only
i bought my iphone thru power mac philippines... however i am now here in the US i cant use it because it says SOS
iPhone 12 Pro Max, iOS 16
Try to do a hard reset as follows:
- Press and quickly release Volume UP button
- Press and quickly release Volume DOWN button
- Press and Hold the SIDE button until an Apple logo appears and then release the Side button (Can take up to 20 seconds. (DO NOT release Side Button when invited to Slide Power OFF)
If this does not work, call your network provider from another phone and verify for sure that the sim is not locked or there are no network blockages being you purchased from another country.
if they verify the signal to the phone by calling it or testing the signal, and it still displays SOS, you can contact Apple Support at 800-275-2273. They can do a remote diagnosis hopefully. Good luck.
