Reliance jio 4G start its service in august free offer(data, voice call, messaging) for only Samsung but after of that announce free for 3 month for all 4G smartphone.about 1)Network Coverage-network coverage of reliance jio is poor rural area or some urban area so it need to improve overall good.2)Customer Service- when its launch it give tremendous speed i.e 4G speed but now till in India 107 crore people use this offer so off course its speed decrease the HD movie, TV play easily at that time but now it is difficult to open that so need to improve here 3)Charge and Billing- in india this offer is free for up to 31 December but new came that it is extended up to 31 march for free for all 4G smartphone so this is good new for costumers