|Today the cellphone celebrates its 40th anniversary and tomorrow Facebook makes its foray into the cellphone market. Or at least that's what the rumors and reports point to. Tomorrow, April 4, Facebook has invited press to its Menlo Park, Calif., campus to show off its "new home on Android." However, even before the announcement of the event last week, rumors had been swirling that social network was working on its own phone.|
Here's a guide to the latest speculation about Facebook's plans. Will any of them hold true? We'll know all for sure tomorrow when Facebook CEO Mark Zuckerberg takes the stage to tell us what Facebook really has in store.