trouble there is we don't for sure,what i did find out tho is that replacement phone(which may be new or refurbished)has a different serial number so a dealer in phones would know and therefore might knock the price down,i have decided to keep my phone as its very slight,i think tho that apples policy of giving someone who has had their phone for less than 30 days one of these phones is dead wrong,most electrical stores replace goods with brand new goods if they fail in the first month,i had to take my ipad2 back after 2 weeks and was offered one of these replacements,i declined and took it back to HMV who changed it with no quibble.