Hi i am looking at buying an iphone 5 privately , however i dont know what i need to check to insure that it will work ,and if it is able to be jailbroken 9.1.2. If it it doesnt allow use in multiple countries .Could u please indicate what things i need to check before making a purchase to insure its working ...and any advice thanks ps. (I know i need to be sure it has no icloud acct or owner has an acct that signs out of)