Updates are pushed via iTunes. When you connect your iPhone via iTunes, the new updates will be installed.
For the first time users,
Updation will happen like a breeze. I was scared when my updates were going on via iTunes. I was worried that my data will be lost. But none of those disasters happen. Before updation, iTunes takes a back up of the data and then updates the OS. Once updated, it restores the backup. And iPhone is back to normal state…with new OS 3.0.1
