Pocket Now has found a leaked YouTube video showing two possible Sony Ericsson phones the X7 and the X7 Mini which are running Windows Phone 7 and look to be scheduled for Q1 2011. This is still unconfirmed but the details are below:

The X7 has a 4.3″ WVGA capacitive display, a new Qualcomm MSM8260 1.2GHz CPU, 8MP camera with 720p HD video, and possibly HDMI out.

The X7 Mini is the slightly smaller version with a 3.5″ WVGA capacitive screen, Qualcomm QSD8250 1GHz CPU, but has a 10.1MP with 720p HD video recording, and according to the slide a 3x optical zoom which are rarely put on phones.

If real, these look like good entries into the WP7 market for Sony Ericsson.

Source: Pocket Now