I have been using reliance gsm as my 2nd sim. I opted for reliance since it offered free internet through internet.org . It worked well for a few days but later to my suprise whenever I try to switch on mobile network the network status changes to roaming and money get cut from my balance. I live in hyderabad and had used almost all the major mobile networks and found reliance to be the worst network. I am planning to port to BSNL or Airtel soon.