Three Throttling

I've had a successful few weeks testing Three's 3G network at home. Getting up to 30mbps off peak. However since Sunday the performance has been very poor, averaging 2-3mbps even off peak.

The router is reporting a much inferior connection from a cell I hadn't sent before. The router since Sunday only ever connects to this cell. Prior to this it reported a number of different 3G cell IDs, disconnecting and reconnecting I would typically see the router connect to different cells. Each giving very similar stats and performance.

I've rebooted the device 20 times since Sunday and each time it keeps connecting to this inferior cell.

Can anyone shed any light on this? Do Three throttle in this way? Locking you to a particular cell id?

I should point out 4G hasn't been affected, it's similar to what it was before, though until now I have been using 3G exclusively due to its superior performance where I am. And the 4G is now connecting to a cell id I hadn't seen before. It seems exclusively to that cell id, which like with 3G is behaviour I hadn't seen before. The 4G signal stats are the best stats I've seen though, unlike 3G. So it makes sense for 4G not 3G.