A:AnswerYes this is an unlocked phone, meaning you can put it on any carrier you want and take it to another carrier when you choose to with no hassles.
A:AnswerI just got an iPhone 8 space grey and it came in pretty good condition! It doesn’t have no scratches or anything on it but i have ordered before and had to send a phone back and they have a restock fee of 35$
A:AnswerThat’s a deep question. Because used/refurbished can mean completely different things to every store. Best thing to is to buy it, check it out. If you hate it, return it.