Reliance jio sim is a new mobile operator network.after mukesh ambani announced this sim is very popular for everyone and this sim feature if any one buy this sim before 31st December then they have opportunity to unlimited mobile calls & Internet services.after this news I am also very excited about it and I am also bought this sim and started to use.after I used some days then I am totally sad its speed became very slow. then I know its features only 1st 4gb mobile data are very fast but when u used 1st 4gb then its became very slow.signal problem also here.now when I used to call this sim not very much well working. I totally sad after I know thats features.