Twitter Flea

i got a contract phone in June there for 2 years, and the deal of my contract is
300 free minutes, unlimited texts and unlimited web. i have a blackberry, i dont
use all my minutes never have, i downloaded blackberry app world and msn, twitter
and facebook apps, i dont know how im going over my £25 every month i also use
google browser on my phone. what am i doing wrong, + how do you find out on your
phone how exactly you are going over the limit. i know i text 21202, thats all .

help. and thanks !