T-Mobile Germany briefly displayed a poster of an unannounced Nokia Windows Phone. From it we've learned that in addition to having Nokia's Drive navigation system, the phone will also feature a 3.7-inch curved AMOLED display.
WinRumors was sent photos of the poster before it was pulled by T-Mobile Germany. The unannounced phone will ship with the recently released Windows Phone 7.5 "Mango".
There is a chance that the poster was of the unannounced Nokia Sabre. That name was leaked earlier today by Microsoft via a Canadian app promotion. At this point, Nokia might as well announce the device, everyone else has.