We all know that AT&T is expected to be a big supporter of Microsoft’s Windows Phone 7 devices when they eventually hit the mobile arena, and one such device has now gained approval from the FCC.

According to an article over on Engadget by Chris Ziegler, the FCC has now conferred their approval on the LG C900 Windows Phone 7 landscape slider device which according to the SAR report says its carrying WCDMA bands II and V.

Those bands mean of course this Windows Phone 7 device will play nice on the Big Blue network. However as usual with LG, they aren’t that great at giving anything else away and fairly good at making an ID label doc useless at classifying handsets so there’s nothing else to be gleaned.

However it does appear that several Windows Phone 7 devices are indeed destined for AT&T, which could well mean it will be a descent Q4 for Microsoft, but will Windows Phone 7 take off well in the face of Android and the iPhone?