To fully answer that...I'll give you an example: why do certain DVD players Composite Video and others dont instead just S-Video : Answer, just how it is. Meaning each company offers there own content in this case Mmode vs T-Zones, where they give as u pointed out a "weather radar" we in turn offer our own things, content for content we both offer around the same things, its just where you go looking, but ultimetly...in my opinion, given i use to work for a company that sold all 6 major carriers, i am now a T-Mobile employee i believe we have the most broad range of services as well as the most reliable, because i had both a AT&T SE T68 and a Motorola T722 with T-Mobile.

P.S if you are ever having problems finding stuff on T-Zones...go to www.t-mobile.com and under T-Zones you can find a online Hierarchy showing all the links and passages.

But again this is just my opinion.