The rumors about iPhone OS 4.0 has spread for a period. While this time, OS 4.0 is really coming. All the doubts will be solved soon.

Just two days after the release of the iPad, Apple announced that it will formally introduce the next version of its mobile operating system—iPhone OS 4.0. So far, Apple has sent out all the invitations for the event, saying “Join us at an invitation-only event for a sneak peek of the next generation of iPhone OS software. The event takes place at Apple, Building 4, Town Hall on April 8 at 10:00 a.m. Suggested arrival time for registration is 9:30 a.m. RSVP to…”

No other further information has been revealed now, if you are interested in the software, let’s follow the event.