BlackBerry's shares surged for second time in this week after a huge ordered was placed by a Canadian firm.
The company, which changed its name from Research in Motion to BlackBerry, did not disclose the name of the buyer who has ordered one million BlackBerry 10 handsets.
BlackBerry EVP of global sales Rick Costanzo said: "An order for one million devices is a tremendous vote of confidence in BlackBerry 10.
"Consumers are ready for a new user experience, and BlackBerry 10 delivers, with strong partner support coupled with this truly re-invented new platform, we have a powerful recipe for success
Earlier this week, BlackBerry's shares rose 14% stoked by takeover speculation by Lenovo and news that AT&T will begin selling the new BlackBerry Z10 touchscreen smartphone in the US later this month.
BlackBerry unveiled the new BlackBerry Z10 and BlackBerry Q10 smartphones in January this year.
Features of Blackberry's new smartphones include 1.5 Ghz dual core processors with 2GB of RAM, 16GB of internal storage and an expandable memory card slot.
BlackBerry Z10 is already on sale in over 20 countries including the UK.