Motorola is extending a promotion on the unlocked version of its Moto X that was originally set to expire at midnight tonight. Motorola announced the extension on Twitter, saying it was in honor of Valentines Day. The Moto X has managed to become a historical artifact in the tie-up between Google and Motorola, which Google is selling to Lenovo for $2.91 billion. It was designed to be the flagship phone for Android, and one that showed the interplay between Googles software smarts and Motorolas engineering teams.