Android Marshmallow for Japanese Sony Xperia Z4 and Z5/Premium models gets Wi-Fi certification

When it's time to push the latest Android firmware to its portfolio, a phone manufacturer has quite some work ahead of it. There's the new code that needs to be added to the proprietary software that all makers use nowadays, there's ensuring it works nicely with all those extra features, there's carrier validating, debugging, government agency certification, Bluetooth certification... and, of course, Wi-Fi certification.
As mentioned, Wi-Fi certification is but a step along the way to users getting the new firmware, so it's still unclear what kind of time window we're talking, but at least we know for sure that Sony is making progress with these three devices. Of course, this pretty much precludes the possibility that any Xperia devices will get Marshmallow before Christmas — not that we were expecting them to, given how Sony has been mum on the topic.

source: Wi-Fi Alliance via XperiaBlog