Well what ever the reason, I'm happy with the free upgrade that hasn't cost me anything. And it is only a sign of things to come with orange supposedly going to be the 1st to roll out 4G. Good on you orange, better coverage, better speeds, and better deals. I get a discount from then because of my workplace so that's 25% off my bill 
Orange easily has the best coverage in the area and now some of the best speeds, people on vodafone in this area struggle for 3G.

Orange easily has the best coverage in the area and now some of the best speeds, people on vodafone in this area struggle for 3G.