Vodafone
https://s3-ap-southeast-1.amazonaws.com/localcircles-s/img/localcircles_b_logo.jpg 0 000 Vodafone is a major player in mobile service network.
The worst service provider among all mobile service operator. Lot of call drop, very slow internet in spite of charging for 3G.
I am of opinion that every body should surrender connection and do not use service of Vodafone