Eighty-four days. That's how long it's been since HTC announced its intent to bring Android 4.4 KitKat to all North American versions of the One within 90 days. With just six days left to go on the countdown, HTC just tweeted on its US account that the final software has finally entered the hallowed carrier labs for testing and will be certified (and, we hope, rolled out) sometime next week. Of course, the process is now essentially under the control of individual mobile operators, so let's hope that they don't make liars out of HTC -- we've had Wednesday circled on our Sense calendars for quite some time now.