Now new information has come to light that suggests the update will start rolling out on August 9, which is next Tuesday. Microsoft’s official Lumia India Twitter handle confirmed the date in a Tweet.
In addition, not all Windows phones are supported by the Anniversary Update, but you can check out the list of supported devices here.
Until next Tuesday, when it will start rolling out for non-insiders, you can check out our review of Windows 10 Mobile Anniversary Update here. If you can't wait until then, you could opt in to the Insider Program, which is offering the RTM build, 14393.5, on all three rings: Fast, Slow, and Release Preview. If you're not up for the instability that could come with Preview builds, go for the Release Preview ring.
Source: Windows Latest
Update: Lumia India has since removed the tweet for unknown reasons, but have replied to questions regarding the Anniversary Update citing only the August 2 rollout, which does not apply to any Lumia or Windows phones.
We'll keep you updated when Microsoft makes an official announcement for the availability of the Anniversary Update for Windows phones.