Mark October 21 on your calendars, boys and girls – the BlackBerry Bold 2 aka Onyx will be arrive via T-Mobile and AT&T on that day. No idea on its pricing details just yet though, but folks who want to upgrade from their older BlackBerrys might want to start cleaning the old Bold trackball soon, since getting rid of it in an online auction could help you generate some fast cash for your Bold 2 purchase.