While UK consumers will be able to enjoy the LG Optimus 2X before us folks in the states, they won’t be able to enjoy the goodness of Windows Phone 7 in a Dell Venue Pro until next month. An online retailer in the UK has confirmed that Dell has pushed the release date of the WP7 device to mid February, blaming Microsoft for the delay. Apparently there was an MMS bug in the operating system and Microsoft didn’t manage to rectify the problem in time. The Dell Venue Pro is the only portrait QWERTY-slider phone available right now, but with some jarring problems the phone had at launch (WiFi issues, out of stock), it has had mixed responses stateside. Now, with the delay happening in UK, it could lead to a loss of customers who might get another phone instead of waiting for the Venue Pro to arrive.