When I did this a few years ago I had to give a months notice to cancel the contract so I planned to use 2 phones for that period. As it turned out Orange took 6 weeks (not kidding) to send me out he 1 month rolling contact SIM so I ditched them for 3 when I got tired of waiting.Soo....
I have an iPhone 4 which is out of contract with Orange. If it looks as though it will be cheaper to buy direct from Apple I will do that an go onto Pay as you Go, again with Orange. How do I keep my number? If I remember I need to give 4 weeks notice?