krou writes: After a backlash from T-Mobile users threatening protests and legal action — as well as threats of regulatory action — T-Mobile has made a partial climb down on its plan to cap existing customers. In a statement, they said: 'Following a further review of our this 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.' However, as the Guardian notes, its original plans would have constituted a breach of contract, which would have allowed customers to cancel their contracts without penalty. Also, in a Q&A, they elaborated on the planned cap: 'T-Mobile has a very sophisticated network management tool which can identify what sort of content is on the site. [After you exceed your 500MB limit] you'll be able to see text on a site, but not anything that requires streaming or downloading.' This includes blocking YouTube content, Flash games and other Flash content, and email attachments (although they're a little hazy on how that will work).