In the first days kickstarting November, Apple was busy releasing iOS build 6.0.1 but also sending the beta version of iOS 6.1 off to the developer community for inspection. This week, however, Cupertino produced a second beta version of iOS 6.1 which is currently on its way to devs. A beta update for Xcode and the Apple TV was also launched.
The build number for this version is 10B5105c and is described by the mother company as containing essential bug fixes and other enhancements compared with the previous version. For example the latest beta features a brand new design for the Passport card that will walk new users through all the features of the app. Panorama support gains functionality again with this build and there are rumors that users will be able to download individual tracks when using iTunes Match.
iOS Developers who are currently registered in the Apple database can download the new iOS version from the Apple Dev Center. The build is compatible with the iPad 2, iPad 3, iPad 4, iPad mini, iPhone 3GS, iPhone 4, iPhone 5, iPod touch of the 4th and 5thgeneration.
Devices that already have iOS 6.1 Beta 1 can easily be upgraded to the current version by accessing these settings: General->Software Update (found in the Settings app).
Source - Apple Seeds Second iOS 6.1 Beta to Developers - Mac Rumors