Don't switch devices after adding money I guess
Got a new live card, added 50 bucks and tried to switch devices to my new phone per instructions. Followed all the instructions and after some confusion and asking heard it might take 2 weeks max. Asked some support how long it should take and that it should be solved in 48h normally like when I made the account in the first place. Now longer than 2 weeks that and 4 support agents later finally heard it might take another 5 days.  If that's even reliable. *EDIT: 4 support chats later finally got a clear answer and the current ETA is 35 days now. Don't use this card for anything crucial I guess unless you want to use your same phone till the end of times