Hi friends I will tell you reliance jio Sim cards and LYF Flame 1, Jio 4G net speed is very good highest speed 30 Mbps I am using jio last two Months but one is most problem if you want call mostly tell to this root line busy, Now I discuss about LYF Flame1 these mobile RAM 1GB internal memory 8GB and battey backup is very poor and veything is better.
I like to reliance jio because he gives to you 3 Months voice calling, video calling, data pack is free Local/STD and any operator afer 3 months 1GB net pack give only Rs.50.
SO I suggest to you everybody use is Relinance jio this is very cheap compare to other telecome company.