Sim not supported
I bought this phone from my friend and I bought a SIM card by it keeps saying not supported with the carrier and idk what carrier this phone with or how can o fix it
iPhone 7, 14
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The phone is locked to a different carrier than the one the SIM is for. You will need to contact the carrier the phone is locked to and have them unlock it before you can use your SIM. Ask your friend who his carrier is, if it was his phone, surely he would know what carrier it is locked to.
Or you could sign up with the carrier the phone is locked to.