1)First you have to buy a new sim or the sim in which you never used wikipedia trick or any other due to which it has 100 mb limitation.
2)Subscribe any BBM pack
3)Subscribe using START BB1 and send to 121.
4)Choose your pack,[RECOMENDED IS 14 RS PACK FOR 1 DAY]
6)Then connect With blackberry.net apn with some main balance
and try to browse dont be afraid nothing will open.
7)then connect with aircelgrps apn and try to browse.
8)For this you must have a main balance >1.
9)So just connect with aircelgprs and enjoy aircel unlimited.