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Will an iPhone 12 be compatible with a 4G sim card?

Will an unlocked iPhone 12 mini work with a 4G SIM card overseas? I understand I won’t have 5G but I want to ensure that my phone will still work on the local network if I don’t have a 5G SIM card. I can’t find a concrete answer. Please help!

Posted on Apr 14, 2021 12:44 PM

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If you bought your phone locked to a provider by selecting that provider at purchase (eg in USA buying it with AT&T chosen) then you would get that message if you put an O2 SIM in it.

If you bought it unlocked then it will take any provider.

Posted on Apr 14, 2021 3:16 PM

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Will an iPhone 12 be compatible with a 4G sim card?

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