Jealously-guarded invitations for the fall's biggest tech event are out today. In an understated request, Apple says "Let's talk iPhone" for an event slated for Tuesday, October 4 at 10 a.m. PT. The Cupertino tech giant will unveil the iPhone 5 and the iPhone 4 S. As expected, Apple's new CEO Tim Cook will unveil the new phone.

As Ars Technica notes, the graphics on the invitation give a clue to what else may be unveiled:

Invitation graphics (shown above) include four iOS app icons (Calendar, Clock, Maps, and Phone) along with the quote "Let's talk iPhone." Apple doesn't usually get this specific when sending out its invitations, but apparently it's trying a new, more direct approach this time around. 

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John Hudson