Apple's latest iPhone 2 beta 5 firmware shows that the company will allow users to turn off access to the faster "3G" network to preserve battery life. The 3G network, while offering faster download speeds, consumes more power and will likely reduce battery life significantly. The screenshot surfaced on an independent blog, along with code references that support the screenshot from the latest firmware (only available to a select group of developers): "Note that this is not fake, it is in the beta 5 .ipsw, but will normally not show up on an EDGE iPhone. Turning 3G on will just crash the phone if you use an EDGE phone. If you do not believe me, then decrypt the beta5 rootfs dmg, and see for yourself in /Applications/Preferences.app/Network.plist ," the developer wrote in his post.