blackberry internet service

How much does U.S. Cellular cost?
Is it possible to just sign up for a bb plan w/o getting a new phone? Cos i would like to get internet access and email services. alternatively i signed an iphone plan w/ optus so can i just use the sim card w/ my bb? thanks!

If i have my own blackberry phone, can i just sign up for a blackberry plan w/ optus or 3?
i live in the UAE and im going back to america for a visit and i was thinking while im there ill buy a blackberry curve 8900. I was looking at cincinnati bell and t-mobile prices and they were really cheap. it was like between $150-$200. So i was wondering if they are unlocked, because if they are i'll buy one and bring it back to the UAE. Also, do i have to pay the $30 a month for internet services or sign a contract if i just want to buy it and come back to the UAE, because im just staying there for a month?

OK, i'm thinking of buying a Blackberry Curve 8900...?
Okay, so I am looking for a new phone, and I see phones with 3g and some without. I don't really want a 'blackberry' or 'iphone' type of phone, just something simple about 20$ or less (with 2-year contract). So i was wondering if it is worth me getting a 3g service on a simple phone? And also if you have 3g, do you have to pay an extra monthly fee? Or is that just if you use the internet services? And is there any other 'nice' features that come with a 3g phone? I appreciate answers to any of these question. Thank you.

blackberry internet service