On 9th December Tuesday Product manager of HTC, Mo Versi announced on Twitter that their new HTC One A9 is going to receive monthly updates.
This update is going to remove several security flaws and will bring a many security improvements to the new HTC One A9 on AT&T. With this the update is going to come up with several improvements to the camera on the smartphone too.
Happy Tuesday! AT&T HTC One (A9) Owners – The latest security updates including improvements to the camera will be OTA'd out by tonight.
— Mo Versi (@moversi) December 8, 2015
But here comes a little twist as the update has been rolled out for the unlocked version of the device in Canada, So you need to check if the specified update is available to you or not. Just head to settings menu over your HTC One A9.
Source Mo Versi