More about decision of T-Mobile

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"The readiness of the software is not the issue," said Derek Brown, Microsoft's marketing director for its mobile division.

Rather, the problem was "the readiness of the entire experience".

Mr Brown declined to go into specifics about problems that have delayed the launch, saying there were engineering, testing, added services and other elements that needed to be coordinated with one another.

"Sometimes it takes a little longer than you thought. This is a brand new market and it takes time and it takes patience, and you have to have a long view of what that means and make the investments - and take the time and have the patience," he said....

msmobiles.com