BLACKBERRY PARTNER PURCHASES 1 MILLION BB10 DEVICES

Well, well, well! things are getting better and better for Blackberry as one of its partners places the largest single order in the company history.
According to a press release posted on crackberry from Blackberry which state that one of Blackberry unnamed partner purchased 1 million Blackberry 10 smartphones, and with shipment  to begin today.
Looking at the words ''unnamed partner'' which made me to guessed who this partner could be. Could it be AT&T, Verizon, T-mobile or Sprint, who made the large purchase?