The Xperia Z will be first Sony phone to launch with Jelly Bean when it arrives in late February or early March, but out of the box it'll run Android 4.1 rather than the latest version 4.2. While the 4.2 upgrade isn't a big deal for "skinned" Android handsets, some of us like to be on the latest OS version, and in a recent online Q&A session, Sony fielded a question about future 4.2 upgrades for its new flagship device.
The good news is that a 4.2 update is scheduled for shortly after launch, but unfortunately that's as specific as Sony's being with timeframes at this point --
"Xperia Z launches on JB 4.1, but will receive 4.2 shortly after launch. As always, we’ll share more info on this over the coming weeks on the blog."
Unlike the jump from 4.0 to 4.1, Android 4.2's features are mostly UI-specific changes to stock Android, meaning they'll be less visible on a phone that's running a customized version of the OS. Regardless, Sony's commitment to a quick 4.2 upgrade will come as welcome news to fans of the platform. Here's hoping the company can deliver on its pledge of a speedy update.