I got a massage from reliance that recharge with rs 42 and got 200mb 3g data + 300 mb extra data for 10 days . I have recharged my mobile and got massage for 500 mb data received and I start surfing . next day my sim balance of rs. 126 had finished without any call.
Even I used approx 150 mb only . But they deducted my balance . Same issue done with my brother and my mom. Thats why my brother had port his sim in BSNL.