Apple has released the latest version of iOS to developers, iOS 5.1 Beta 3, which should mean that we are getting closer to the general release of iOS 5.1 which will hopefully fix the battery problems that a number of iPhone users have been experiencing.
It looks like iOS 5.1 Beta 3 has restored the toggle switch which allows you to turn of and on the 3G cellular data access, and also it comes with a new API that will allow app developers to flag content in their apps that doesn’t need to be backed up.
We don’t as yet have any information on when Apple will release iOS 5.1 to everyone, as soon as we get some more information we will let you guys know.
Source Mac Rumors