Testing of the Apple’s iOS 5.1 is reported to be in the golden master stage and has satisfied the requirements of Apple’s quality assurance test. The iOS 5.1 is presumably to release with the launch of iPad 3 within the next few weeks.

[box_dark]The build number of iOS 5.1 Gold Master is 9B176 according to a very solid source, although three different partners who are testing the Gold Master claim to have slightly (by single digits) higher builds numbers on their copies, I’m assuming that’s because right now it’d make sense for those people to be testing what will soon be released as 5.1.1, so I’ve disregarded the claims.[/box_dark]

The new update is reported to include new Japanese Siri support and a new camera slider and two more big updates which are yet to be reviled.

Source: macrumors