Ordered Monday 20th , order confirmed. Left it all Tuesday, no update. Contacted via chat and was told order to be sent for delivery Wednesday 22nd. No updates. Contacted them again via chat told Thursday. Didn't arrive till Friday. No contact to explain delay despite being in stock at all local CPW. Transferred my O2 number to new O2 contact despite CPW and mobiles.co.uk saying you can't keep same number on a new contract with same network. You don't port you just transfer. Found this via chat with O2 following search of internet. You can definitely keep your existing number with the same network without doing the update route. I got new iPhone 4s on O2 £13 unlimited texts 100mb which is far better than any upgrade.