I am using vodafone in 2015 I used 2G for 7 month and then upgrade to 3G a very exiting 3G pack camed having lots of data and validity may be of special offer and I recharged with that my network gone to roaming since vodafone did not have 3G circle in patna so I was receiving data from airtel. Inspite of receiving data from airtel having highest speed I was receiving poor speed even in good network strength( tower) I complaint a lot to apllete authority asking for worst speed and they also call backed me asking if problem is resolved but my problem not solved I continued receiving speed between 200 to 80 kbps which is very bad in 3G so I used all the data and never gone again for vodafone 3G .