Today Reliance Jio is one of the best telecommunication company in India for its Jio sim, Releiance Jio Sim launching on 5th of September 2016, but I had brought this sim with lyf mobile phone but, I had 8 days already completed after buying this phone and sim but the sim was not activate till date, I think Reliance Jio sim useful after some months ago, because now for heavy load of customers everybody facing this problem.