iPhone 8 Plus SIM card doesn’t fit iPhone 12 Pro. Do I contact my carrier?
I’m concerned my new iPhone 12 Pro doesn’t fit my SIM card from my iPhone 8 Plus. The corners are different. Do I contact my carrier?
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Question marked as
Apple hasn't changed their sim size for quite a while. Can you check that you put it in the slot correctly?
https://support.apple.com/en-us/HT202645 > Both iPhone 8 plus and iPhone 12 Pro uses nano sim size.
For more help, please do contact your carrier.