Microsoft job post says the mobile division of the company is working on LTE
"We offer a lot of interesting variety because we work with a range of hardware platforms and cellular technologies (CDMA/GSM/LTE)."
This is a nice little detail that sounds logical and even likely, but have never been officially announced (and, in a way, it's still not officially announced). Even though it now seems almost certain that the Redmond-based giant is hard at work to bring LTE support to its Windows Phone platform, understandably there is no timescale available when we will see the first WP-powered LTE-enabled products on the market.
MIX 2011 is happening as we write this, and some info about Windows Phone's future is anticipated to be disclosed there, so we may have some interesting news about Microsoft's mobile platform in the next few days.
You can find the full job post if you hit the source link.
source: Microsoft via WMPoweruser