Software update ABI07 was recently disseminated to the unlocked version of the BlackBerry KEYone and the BlackBerry Motion. The update included the October 5th, 2018 Android security patch. According to CrackBerry, the same security patch is being sent out to the AT&T version of the KEYone through an OTA update to software build ABI975. Unfortunately, the update has yet to be listed on AT&T's website, but it is being pushed out to KEYone users on AT&T's network.
When you receive the notification that the update has arrived on your KEYone, there are a couple of things you need to do before starting the updating process. First, you should make sure that your phone is connected to a Wi-Fi signal. You should also have the handset's battery charged to full-strength.
Since this is an OTA update, it is released in waves. This means that it might take a few days before it hits your phone. If you're the impatient type, you can go into the device's settings and try to manually update your KEYone right now.