Blackberry curve 8900 vs. blackberry curve 8520?

Okay so i'm 15 with a job. I just bought an ipod nano from a pawn shop brand new for $75. While I was there, I noticed 5 blackberry curves for my carrier (Tmobile). I'm not sure if they were 8520's or 8900's but they range from $100-150. The one that...

replacing my curve 8310 with a newer blackberry, i like the 8900 better but dont the trackballs break easily on this one to? which one should i get?

I was wondering which blacberry is better. I know the 8900 has a trackball and 3.2mp camera and the 8520 has a trackpad and a 2.0mp camera.

i currently have the bb curve 8310, im upgrading next month. should i get the bold or the new curve? i dont use internet, i just text alot. i like the bold because its larger, and i like the larger keyboard tbh. i also like the new curve because of the...

recently my iphone broke and its too much to get repaired so i'm going to buy a blackberry off ebay. I'm gonna get the curve 8520 or the bold 9000. Which one is better? I need it for texting and social networking and the one that has a good battery life...

okay so ive asked this question twice now .. and had no answers .. 3rd time lucky .. here goes.... i have a bb curve 8520.. ive completely broken it .. need a new phone .. dont know weather to get a new bb carve 8520 or an iphone 4s .. pros and cons...

what are the differences between them both? i am thinking of getting the blackberry 8520 but its only really going to be for texting calling and internet. which one is better features? also im 15 can you plz explain diffrent features? thanks x (:

I have t-mobile and I'm trying to figure out if I should get a Blackberry curve 8900 or a Samsung behold. I like a phone with a lot of features.