Yesterday we reported on T-Mobile UK's reduction of its customers mobile data limits to just 500MB per month, resulting in a chain of angry comments and retweets. Now it appears that the network has backed down slightly, relaxing the rules for its current subscribers.

Lysa Hardy, VP of T-Mobile UK, explains that the carrier has "reviewed" its policy and decided that existing customers will be exempt from the new 500MB limit for the life of their contracts. New sign-ups, however, will still be subject to the new limit.

“On Monday 10 January 2011 we announced that, in line with the rest of the industry, T-Mobile would be reducing its Fair Use Policy for data usage to 500MB a month for all mobile phone customers. Following a further review of our policy, these changes will now be introduced from 1 February, to new and upgrading customers only - not existing customers.

There will be no change to the data packages for existing customers for the duration of their contract and we apologise for any confusion caused. The revision to the Fair Use Policy is designed to ensure an improved quality of service for all mobile internet users."

This is great news for Android users on T-Mobile UK, who will have their fair-use limit set at 3GB until the end of their contracts. When renewal time rolls around, they'll have the option of switching carriers if they want to use more than 500MB per month. [T-Mobile UK]