Not only does ios5 have loads of phone features, but it has iCloud.
iCloud delivers on the promise of wireless computer usage. Music/data/contacts/photo are accessible from all devices mac/iphone/ipad instantly.
You can wifi sync and backup your iphone – bye bye mr white usb cable.
You can set your phone to backup to iCloud, via wifi – very nice.
iCloud has a remote ‘find my phone/mac’ feature. The locate function sends a message, and plays a tone, and shows you its location on a map. And you can remote lock your phone or wipe it.
The upgrade took forever, and lost most of my apps. It actually wipes the phone, and re-installs everything.