i plan on getting the t-mobile g1 soon, with a talk plan of course, and the 34.99 data plan (unlimited data and texting, and maybe something else, im not sure).

if i put my sim card into a sidekick, or an unlocked iphone, would i be able to make calls/send texts/go on the internet/etc?

if not, what won't i be able to do?


thanks.