iOS 5.1 Beta 3 for the iPad, iPhone and iPod Touch was released today for developers only.
There is no information on bugs or features in this version apart from “This beta version of iOS 5.1 contains bug fixes and improvements.”
If you are a developer and have Beta 2 installed you should be able to upgrade Over the Air by going to Settings,General, Software Update.
Changes Found (On my iPhone 4S)
Version: 5.1 (9B5141a)
Carrier Bundle version has updated on My Local Carrier (Telecom NZ 11.1 -> Telecom NZ 11.2)
With Telecom NZ Sim installed you can Edit the Tethering APN/Username/Password (but no other APN Details) ? WHy?
You Can Enable/Disable 3G (No use on Telecom as they are 3G Only)
You can Enable Airplane Mode and then Enable Wifi on (or was this in previous versions?) (Some Planes have Wifi)