transfer details from one iphone/sim to another iphone/sim

cherylw1961 wrote:

My friend has split up with her partner and he is insisting that she give him back the iphone with the sim card that he gave to her. It has all her personal stuff, banking and photos. She has got another Iphone - can she set up an icloud account to store the details on her sim card and then transfer it to that new phone and number? Once she has done that is it safe to delete everything on the returnable iphone. I would be grateful for any advice

There is no data stored on the sim card.

IF she has an iphone she can do this Transfer data from your previous iOS or iPadOS device to your new iPhone or iPad - Apple Support

Then she does this s What to do before you sell, give away, or trade in your iPhone or iPad - Apple Support