I have used jio sim as it was having the best offer.some few days beforw only I have registered one jio sim from jio office .first of all it took 200rs from me and the next is that it had got activated in 5days.afterall it git connected and in first some days it was having high speed and I felt vey happy.but after somedays I noticed my ohine gets hanging up.no other sik can be used no msg is going and for connecting to a phone it took about a minutes and never connect in first try.Tge net speed is now having only 45kbps .And there is much signal problem.it charges are less as compared tobothers but bcause of signal it is not good.