There's more on this from AppleInsider by the same author.
[www.appleinsider.com]
Here's the relevant passage:
"The final operator who is going to be pissed is T-Mobile, who has been just as loyal of a partner to Danger as Sharp has been. I don't know exactly what Microsoft has been telling them, but they have no doubt realized that they've been cut out of this deal in favor of their largest competitor. What's worse is that apparently Microsoft has been lying to them this whole time about the amount of resources that they've been putting behind Sidekick development and support (in reality, it was cut down to a handful of people in Palo Alto managing some contractors in Romania, Ukraine, etc.).
"The reason for the deceit wasn't purely to cover up the development of Pink but also because Microsoft could get more money from T-Mobile for their support contract if T-Mobile thought that there were still hundreds of engineers working on the Sidekick platform. As we saw from their recent embarrassment with Sidekick data outages, that has clearly not been the case for some time.
The numbers are 888-470-5534 for Readyfill and 866-514-4965 for the robocall reminders. I used it and haven't bothered since with annoying calls.