Apple have agreed to replace my old iPhone 5 with a refurbished model. They emailed me the IMEI numbers, when I checked the new one it listed that the phone was manufactured in January 2017. Wasn't the 5 discontinued in 2013? I know refurb phones are not new, but can there be a new IMEI number for a refurbished phone even though its a refurb? Can the IMEI on the back be different to the one listed in the software? Thanks.