Do i need to unlock an at&t iphone to use it for verizon?

Do i need to unlock an at&t iphone to use it for verizon? - 1

Added (1). or can they just take the sim and put a new one in? Read both options when i googled it

Added (2). or can they just take the sim and put a new one in? Read both options when i googled it

Added (3). its an old iphone that hasn't been used in a long time so i'm not sure how the request to get it unlocked works

Yes it has to be unlocked in order for it to work with another carrier. You can unlock it pretty easily at AT&T's website: https://www.att.com/...nlockstep1

Now. Verizon is a CDMA carrier, while AT&T is a GSM one. These are very different technologies and not cross compatible. Verizon usually will not help you with things like this, so you're on your own if it doesn't work correctly.

May not work at all depending on which phone

Probably will need to purchase a verizon phone

Unless it is 6s, SE, 7 or newer it will not likely work with Verizon even unlocked