i want to unlock an iphone 3g that has a firmware that is able to run the netflix app on it. if i do unlock it can i still use the app while running my tmobile unlimited data plan? also if i do unlock it do i have to switch my tmobile data plan to a certain one? i currently have the sidekick lx 09 data plan, will i have to upgrade to the android one? or the blackberry one? or can i still use the internet and connectivity of the iphones 2g with my Sidekick plan?