What would deaf people like to see in a cell phone?

Whatever you may call it, a cell phone, a smart phone, text phone, a wireless phone, PDA, and so on, as a deaf or hard of hearing person, explain to me and to the rest of the world out there on some of the things that you would like to see improved or added onto your phone. Or if you're in a ranting mood, explain some of the things you do not like about your phone when it comes to communicating or texting to your friends and families. And what you would hope to see in the next 5 years if you think you can predict the future on the improvements you'd expect to see in your next phone when it comes to communicating to the outside world, deaf or hearing.