When will you be able to get your hands on a working copy of Windows Phone 8.1? During yesterday’s Build keynote announcement, Microsoft mentioned a few different windows for us to consider: “the next few months” for OTA updates, late April or early May for new phones running 8.1 (like the Lumia 630), and “this month” for the Developer Preview. We already heard an April 10 date rumored for the preview release, so is that what we’re looking at here? Maybe not. A new leak sure suggests that there will be a slightly longer wait in store before the WP8.1 Developer Preview is ready for distribution.
According to the email, Microsoft is still finishing up the last touches on 8.1, work it refers to as the “Final Adaptation Kit build.” Right now, the ETA for that looks like it’s April 8. This would then be combined with the core build we heard about from last week to give us the “Windows Phone 8.1 QFE1 Final Adaptation Kit Build,” which Microsoft would then provide to OEMs, probably around April 14.
Only after we get to this point would the WP8.1 Developer Preview be ready for distribution to current users. While we’ve heard at least one estimate placing its release on April 14 itself, that sounds wildly optimistic, and we wouldn’t be surprised to see its release drag behind by a few days, if not a solid week.
At least from what we’re seeing here, we wouldn’t expect the WP8.1 Developer Preview to land until we’re getting into the second half of April.