I'm currently a Blackberry user on Orange UK and have decided to switch to an Android phone when I upgrade in July. Am weighing up the HTC Sensation and the Samsung GS2, although erring towards the Sensation (other half has the Desire so am used to Sense UI and the GS2 just feels a bit flimsy with clunkier software). As I'm new to Android, I would like to know which carriers are quick about bringing the updates out on their network? Although I can upgrade with Orange I would consider switching to a new contract as I lost some functionality when I did a Blackberry OS upgrade, rang Orange to find out why and they didn't even know that the 4.5 OS was available. So please people, tell me which carriers are good and which to avoid if I want my new smartphone to stay up to date.