[Nexus 7 Q&A, Help & Troubleshooting] GedBlake:
Hi, hennimore...

Sorry it's taken me a while to respond... been busy with family issues (I don't seem to have the time these days that I used to, to focus on Android stuff):(.

Anyway... taking your questions in order...

If you've just flashed a clean install of KRT16S, then you certainly won't be rooted. Nor will you have a Custom Recovery installed. You'll be runing 100% totally unmodified stock Android KitKat. The only difference between your Nexus 7 and the average Joe Bloggs' Nexus 7 (who just bought his yesterday:))... is your bootloader will be unlocked.

With regard to applying the new update... KOT49H

Well, there are three routes you could go down...

1). Await for the OTA to appear normally in the notification bar, or go to SETTINGS>>ABOUT TABLET > > SYSTEM UPDATES... and tap on the 'check now' button. When the update appears (and sooner or later it will), it will be flashed automatically via stock recovery. This of course, is the standard method by which 99.9% of all Android users get their updates.

2). If you don't fancy waiting, fastboot flash a Custom Recovery, like TWRP or CWM, and then download the

KOT49H OTA .zip

directly to your Nexus 7. Boot into your Custom Recovery of choice (via the bootloader), and flash it manually.

3). If you haven't done much with your Nexus 7 (ie, installed lots of apps and copied lots of stuff over), since you flashed the full factory image of KRT16S, and you don't mind repeating the process... then the full factory image for KOT49H has now been uploaded by Google, and is available

here

. Download and flash it the way you did KRT16S. It goes without saying, that this will reset and wipe your device again.

*****

Addendum: It seems that Google have made a bit a mess (of some) of the KitKat 4.4.2 factory stock image download links... and when clicked upon, will give a 404 error message.

The corrected download links can be found here...

http://xdaforums.com/showthread.php?t=2565531

*****

Whichever of these methods you use to upgrade to KOT49H from KRT16S... you'll need to

fastboot flash a Custom Recovery afterwards if you wish to re-root.

With regard to USB debugging...

You won't... this is because Developer Options are hidden by default... presumably to prevent non-technically minded people from screwing things up:).

To enable developer options (and by extension, USB debugging), go to SETTINGS>>ABOUT TABLET>>scroll down to BUILD NUMBER... on BUILD NUMBER, tap 7 times. You will see a 'toast' message that says something like "Congratulations, you are now a developer!". (If only it where that easy, eh:):):)).

Anyway, with Developer Options now enabled (which you should now find in SETTINGS), USB debugging can now be turned on.

Incidently, I've just seen a new option in Developer Options, called Process Stats - Geeky stats about running processes. I'm pretty sure this is new to KitKat, as I've never seen it before. Anyway, tapping on it does indeed yield some stats... which are interesting... Google however, consider them geeky. The implication being that anybody interested in such things is a geek. I just found it humorous, the use of the word geek by Google:).

Humorous allusions aside about whether everybody on XDA is actually a geek:)...or not... I hope this helps.

Rgrds,

Ged.