I did a short consultancy gig at T-Systems (also part of Deutsche Telekom, like T-Mobile). Apparently they had bad experiences with T-Mobile services so were in the process of switching to another provider.
Funnily enough, T-Mobile was not such a big fan of the IT service provided by T-Systems, and was also looking for an alternative.
Sounds like a very healthy company indeed.
P.s. John, if you read this, I also pay for the EFF.