Does anyone know when the official time of the iPhone 4 OS is to be released?

Apple will release iPhone OS 4 on Monday 21st June at 10AM PST

The latest update is 3.1.3. All this will change to 4 as Apple rolls out the update and the servers start getting hammered at 10am PST June 21, 2010.

The fastest way to get the update is to connect your iPhone to your computer Mac or Windows and launch iTunes if it doesn’t connect automatically.
The check for an update at 10am or after and you will be prompted to download the update and install.

Be sure to sync and do a backup before you do the update.

We trust that Apple has done extensive testing, and that developers have tested their apps.