u/Conscious_Avocado225

My mom gifted me an iPhone 12 with a physical SIM card slot. I am working to unlock it from AT&T and trying to determine whether an iPhone 12 purchased new from AT&T has the necessary antenna to work on Visible. I currently use an S20 on Visible with a physical SIM card. Assuming the iPhone is unlocked and has the required hardware, can I take the SIM from my S20 and put it into the iPhone 12? Will Visible recognize it and provide service? Or do I need to work with Visible and provide them with information about the new device? If physically moving the SIM card works, can I move it between the two devices as often as I want?