AT&T HTC One A9 receives its monthly security update
The Canadian update weighs in at 244MB and also includes security patches. But this update brings with it improvements to battery life. Considering that the device brings a small 2150mAh battery to the party, any update that can extend the life of the juicer inside the phone has to be a welcome one. The update to the unlocked version of the One A9 in Canada also includes system enhancements for the mid-ranger.
While neither update is massive, we do suggest that you connect to a Wi-Fi network when updating your phone. You should also make sure that your battery is charged to at least 50%.
source: GadgetzArena (1), (2)