Trick for hacking rcomwap/rcommms.
Just open the below link in your default browser:
http://ssg.wdsap.ricinfo.com/ssg?_rapsvc=91.288&_svc=91.288&dev=3&rid=10&cid=568&screenid=6&appid=24&bankid=31&SL=0&BL=1

It is the unsubscription of old default plan i.e, 50p/mb.
A page opens like 'Do you want to unsubscribe from mobile internet plan?'
Click 'Yes'

Actually you are unsubscribed from present default plan but when you try to open any other site it successfully opens and your balance doesnt deduct.
Its a system bug so enjoy till it is blocked!!