3G is “3rd Generation”. It is a term used to describe those phones that you are able to watch videos etc on. Like 3 was the 1st network where majority if not all of the pohnes were 3G. Features include video calling etc
It’s a type of cell phone signal that is extremely fast (it lets you watch videos, download pictures, etc.) Therefore, no, you can’t put it on your Ipod Touch because that’s not a cell phone. 3G service comes with the phone.