SIM card is invalid
I bought an iPhone from my hands, everything was fine until I did a factory reset, now the iPhone is not activated, the SIM card says is invalid. what to do? help me please
iPhone 7 Plus, iOS 14
Remove your SIM card from the SIM card tray and then put the SIM card back. ... Make sure that the SIM tray closes completely and isn't loose. If you use a SIM tray from a different model iPhone, iPad, or from another phone manufacturer, it might not fit properly.
If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad ...