@Khaqan ,
Are you in contract and when does your present contract end? If you still have months left, then you would have to pay off your present contract to be able to upgrade. I take it you have a phone contract with EE and not a sim only contract?
To contact EE customer service dial 150 from your mobile phone or ring customer service for free using Skype or another phone: +44 800 079 8586 or +44 800 956 6000.
