We’ve been tracking hints, following leads and pursuing theories on Nokia’s first ever Lumia tablet for what feels like months now and, despite rumors of a last-minute cancelation, there’s a good chance one of the last pieces of the puzzle is today falling into place.

nokia sirius Nokia Lumia 2520 tablet visits FCC under RX 114 moniker, cellular bands galore

A Nokia device going by the cryptic RX-114 codename has made its way to the FCC a couple of days ago and, though the agency’s internal documents don’t spell it out for us (they rarely do), all signs point to this being the mythical “Sirius”.

What’s even more intriguing is there’s compatibility for a number of 4G LTE bands (2, 4, 5, 13 and 17, to be exact), plus GSM/EDGE and HSPA+ support. Which in layman’s terms means the Lumia 2520 (as a little bird told us the slate will be named in the end) could technically, possibly work on the cellular networks of at least three of America’s four major carriers: Verizon, AT&T and T-Mobile.

Anything else the FCC reveals? Not exactly, unless you count the boring mentions of Wi-Fi, Bluetooth and NFC connectivity options. But hey, it’s not like the tab is such a grand enigma anymore.

Nokia Lumia 2520 FCC Nokia Lumia 2520 tablet visits FCC under RX 114 moniker, cellular bands galore

For one thing, we know for sure its announcement is due on October 22, as part of a special (and likely glamorous) Abu Dhabi event. The spec sheet is tipped to include a Full HD 10.1-inch display, pre-loaded Windows RT 8.1 (which will likely be the thing’s Achilles’ heel), quad-core Qualcomm Snapdragon 800 SoC (I’ll drink for that), 2 gigs of RAM and 6.7 MP rear-facing camera with Carl Zeiss optics.

As far as pricing goes, the Wi-Fi only, “entry-level” configuration will likely cost roughly $500 (presumably with 32 GB of on-board storage), and chances are Nokia will look to pair the 10-incher with a range of optional accessories (think Microsoft’s Surfaces) in order to increase productivity. Such a shame it won’t run full Windows 8.1, huh?

Sources: GSM Arena, FCC