So when this number appears fleetingly in a YouTube teaser video for a new Motorola smartphone that promises to be "Faster. Thinner. Smarter. Stronger," you don't need to be Sherlock Holmes to deduce that what we are talking about here is, probably, the first smartphone that will support HSPA+ at 42Mbps (theoretical).
And in contrast to recent Motorola phones (the Defy and the Atrix) This one is being launched with Optus, not Telstra. iTWire has received an invitation for 27 October to the launch of "the latest Motorola smartphone" and the invite carried the Motorola and Optus logos.
Optus announced on 15 September that it was: "rolling out HSPA+ technology to increase potential data speeds on its mobile network. It said it had "already upgraded more than 700 mobile sites across the country to HSPA+ and [planned] to continue to extend its HSPA+ footprint."
What Optus did not say was when HSPA+ services would be offered; or whether these would be single carrier 21Mbps, or dual carrier 42Mbps.
And the video suggests we won't have to wait until the 27th to find the answer to the ultimate question; it shows a date of 18 October.