My mom just gave me her old iPhone and I want to reset it. I know I’m supposed to use ā€œErase all Contents and Settingsā€, but my question is. The phone has 64GB purchased on it. If I reset it using ā€œErase all Contents and Settingsā€, will I lose the amount of GB that was purchased on the phone, or is the GB forever even if the phone has been reset?