iPhone is fixed cos there is small subsidy on the phone and big subsidy on the plan.. The berries have big subsidy on the phone, so the penalty is variable based on the tenure of contract

hi guys...i would like to ask... is the BIS service activated by default when i sign up the plan?.... because i bought a 9780 with a year contract from digi 1week ago...but just now, i try to play with the email setup....end up i got a notification from digi saying that my "BIS" is now activated.....but before this i can bbm,facebook, twitter, surf online...hmmm..but the blackberry logo beside the signal bar do show up....hmmmm.....if cancel BIS means cannot facebook and twitter/bbm right??