I've switched back and forth between 3 and Vodafone like 4 times now in the past year. I keep having a problem with Vodafone where I keep losing credit (I'm on prepay) and when I check with them they say I'm using large chunks of data when I'm not. I kept having this issue with 2 iPhone's and a Galaxy Nexus so the problem was obviously on their side.. Their customer service sucks. 3 are great and I get unlimited data but it's so effing slow..
How is it over there? Here in Ireland it's really slow (never over 3mbps, usually less than 1mbps compared to always over 4mbps and up to 7mbps with Vodafone)
Around about the same. I get 2-3mb/s at home, with 6mb/s being the highest I've seen around town, so on the whole on par with Vodafone. However it's much faster than my home WiFi (1mb/s with BT