I am using it as a secondary sim as Jio Voice call is very Worst If you are calling to anying it will connect you after trying 3-4 times even sometimes 5-6. But it is giving fabulous Net. It is giving me 4 GB - 4G data per day and the speed I am getting in ALIGARH City is 1 Mbps. Welcome Offer by ambani is best. But It is the sim that you can use freely it DEC 2016 after that it will Charge you. Till that Enjoy the free net.!