A:AnswerT-Mobile and Sprint have merged so there plans also merging. I've been with Sprint for over 10 yrs and they have always been good. I still get deals with them.
As tp how much monthly it all depends on the deals during that week you get your phone, I got my iPhone X at $20 a month but its flex plan, for the installment plan your looking at around $40 a month, plus taxes up front.
Hope this answers you're question.
A:AnswerIt all depends really, on how bad the condition of the phone is, cracked phones do have a decrease in value, water damage is even lower. So it depends on the condition.