Vodafone reduces the speed to allow all of our Prepay and Pay Monthly customers to enjoy our network. After you use 22GB of NZ data, Vodafone will reduce the maximum speed to 1.2mbps for the remaining billing cycle. Even after your speeds are reduced, you will still be able to use your data for checking email and social media, stream music and browse the web. However, the quality of video streaming will be reduced to the best streaming rate possible on a 1.2mbps connection speed. The actual data speed you get will also depend on multiple factors, including distance to the cell tower site.