Sorry in advance for slightly threadjacking.
Does vodafone limit the speed that a 2degree's user can get roaming onto there network? I always seem to get pretty pathetic speeds and just tested again now. Im located in the Blenheim CBD, which is covered by vodafone DC-HSPA+, my device is a 2degrees supplied Nexus 5. Theres no network settings i can see that could be changed, its set to 4G preferred, wishful thinking i know ;)
I chose the wellington Telecom server to try and avoid any internal routing issues.