Reliance Jio is the best network in india. I have brought the jio sim before 8 months and I have also brought a 4g smart phone for this because of the requirement of the sim. Jio give us so many offers such as free unlimited voice calling and video calling that is good for any customer.Reliance jio also offers us very high speed internet data first free for first six months and then recharge of 309 for next three months , with unlimited voice and video calling.In short I can say reliance jio is the No. 1 network in india. customer service is also good.