Please read through the FAQ sticky at the top of this forum. It will point you to several topics and postings by Mark Rehjon, one of which concerns BBs and the deaf. There is another sticky at the top of the RIM S/W or aftermarket S/W forums where I'm capabilities are discussed. And lastly www.blackberry.com
has a compsrison feature on the products page where you c, compare the features of different BBs.
Hope this helps.
Edit: And I didn't even say "learn to search" [/sarcasm]