sim not supported
my iphone se after update sim not working
iPhone SE, iOS 15
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If you are seeing a SIM not supported message, that means that the iPhone is locked to a carrier other than the one you are trying to use a SIM card from. You will either need to use a SIM from the carrier the phone is locked to, or ask if they provide unlocking services and if you qualify. See the information here, How to unlock your iPhone for use with a different carrier - Apple Support