It depends on your mobile phone plan.
It means you will receive texts (to your mobile phone) with updates.
You have to have Twitter mobile enabled.
No. Twitter is free
you do not have to pay for twitter.
No, twitter is completely free as of now . There is no need to pay for using twitter .
no
no, twitter is TOTALLY AND COMPLETLEY FREE!
The Twitter App for the Blackberry is free.
No, you don't need. Twitter is completely for Free.
No, you just pay for the contract.
Twitter does not cost anything.
no