Adding to the small bevy of updates that were pushed out yesterday for several devices, TELUS has now started pushing out OS 10.3.1.2708 (Software version 10.3.1.1865) to multiple BlackBerry 10 devices such as the Passport, Z10, Q10, Z30 and Classic as well.
Much like yesterday's release, this OS has been around in leaked and official form for quite some time now for ShopBlackBerry and Amazon purchased devices, so there's plenty of information about what's new and what's not already available but, for the most part, it's just fixes over earlier 10.3.1 builds that caused issues for some folks. You can read the official release notes here.
You should be able to check for software updates and find OS 10.3.1.2708 waiting for you if you're not already downloading it or never received the notification as of yet. Additionally, just like yesterday, there's a great chance of it being available on other carriers as well, so it never hurts to check.