My iphone is playing up a bit and I have over 500 days on my contract - I went for contract only, not a new phone, which turns out was a bit stoopid. I would prefer not to be without phone in these current times eg if alone at home and isolated - so thought I would look into getting a spare as an upgrade v expensive. Am not concerned about being latest model - I just want one in reserve that I could put my sim in if my current phone stops working. Anyone know the best/cheapest way to do this? My current phone is an iphone 6s if that makes a difference re sim size etc