Apple has just released the third beta of iOS 5.1 to developers. As usual it contains a load of bug fixes and improvements, but the big talking point is the re-introduction of the 3G on/off toggle.
In previous iPhone models, the switch 3G on or off setting was common place, and was incredibly useful to people who always had their eye on the battery level. For those, like myself, who spend most of their time indoors or in an area with a WiFi connection available, 3G is a service that isn’t required. Switching it off can increase your phone’s standby by a huge amount. As an example, recently when I had the Galaxy Nexus it went from lasting one day to lasting 3 full days without charging. I’d expect the same or similar results from the iPhone 4S.
Although the software isn’t available yet to the public, is does give us some clues as to what we can expect, and should hopefully have all its issues ironed out before public release. If you are a developer running the second beta, just check through settings for a software update and it should be available over-the-air.
What are you hoping for in future versions of iOS? My biggest hope is to see third-party widgets enabled in the notifications drawer.