Microsoft may have sold 877,000 WP7 smartphones to carriers and retailers in February alone7
We should mention at this point that the estimate doesn't necessarily translate into almost a million WP7 devices reaching retail customers in February, the number only represents how many units have been shipped to Microsoft's business partners for further resale. However, can the research be precise once again? After all, WP7 smartphones have been growing in popularity across Europe even though they are facing serious competition. We are expecting an official announcement from Microsoft, but if the above estimate is correct, February would be WP7's best month yet.
source: The Next Web via Boy Genius Report