KemoSabe-666

Hey mates, since I got a new iphone I want to give my old ip14 to my girlfriend. The ip14 has a monthly ac+ subscription. If I now reset the device and use my girlfriends apple id, do I have to call apple to transfer ac+ to my girlfriends apple id or can I just leave it running under my apple id?

Hey guys, maybe you already had a similar case: If I use apple care to get my broken rear glass fixed, can I keep the replacement device they send me? Or do they repair my broken phone and I need to send the replacement device back to them afterwards?

Also, what happens to the battery? Mine is already at 90% after a year. Will the replacement device have a new battery?