3 seems to be the best for me.
With o2 I also got less than 0.2mbs download.
Vodafone wasn't much better.
Usually get about 4-5mbs on 3.
Had to go to Leeds for work at weekend and picked up the tiniest 4g signal (0-1 bars) and was getting 15mbs can't wait for LTE rollout in my city this year
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