08-10-2012 01:11 PM
At the top of each device forum, there should be some "sticky" threads that discuss the OS levels available for many models. If they include your model, then those would be your reference point. For the 9790, there is this thread:
Note that our good friend Xandrex has had little time to keep those updated...but, while the actual OS level information may be out of date, the list still is useful for digging through the official download portal:
Note further some posts at the end of the sticky thread...you will see some discussion about how the actual OS release cycle is controlled.