If you want to purchase a Nokia Lumia 900 phone online at AT&T you will run into a small speed bump. As you can see in the screenshot above (or by going to the AT&T source link below), the phone is out of stock for both the black and cyan versions. The situation seems to be the same at brick-and-mortar stores but speculation is that the units have been sent back for reflashing with the latest data connectivity fix. If you still need to grab a unit pronto then head over to Amazon.
On a related note, a magenta flavored Nokia Lumia 900 is possible, as hinted by a screen advertising the new Nokia inside a Microsoft Store. We already have black and cyan as color options on AT&T but would you be interested in this third flavor (or rather prefer the white if the answer is yes)?
Source: AT&T, WPCentral