Apple releases it’s new iOS beta version for developers only.
Many problems like maps accuracy & others are already fixed in previous beta versions of iOS 6.1
Few weeks before apple released iOS 6.1 beta 3 now this beta 4 has released with changes like –
Improves how boarding passes are handled in the new Passbook application introduced in iOS 6.0, this beta is said to include a few minor changes to safari also & few more bug fixes.
By following the criteria of previous updates this update maybe release in March 2013 or it can be early in 2013.
Stay connected for the news of any new jailbreak release and firmware release.