This the best service provider in the whole world, as everyone know it is providing free calling and internet sevices , the coverage network of jio is almost every where which provides hassel free sevices, as it is a new network and users are in crores the voice quality and call connectivity is low but the internet connectivity is fine, the costumer care service is also fine they respond to you very fast and in charges and billing case I can’t say any thing up to 31st march.