Re: [Q] How to unlock TF700 on JB
You have to use a different search engine, my friend!
The answers to your questions are right in this forum, and the relevant threads are at the top in this General section as stickies
Check out the Official Asus TF700 all-in-one thread by Pretoriano80 and also his index of tools (you'll need those later).
While you're at it start reading the CleanRom Inheritance Help thread by Thibor69 and in general: start browsing here, get familiar with the lingo, use the search function if you're interested in a particular topic (although - I have to admit the forum search engine su..., ahem - could be better. Using Google search and selecting the xda threads showing there is what I usually do).
Well, and then, if you really, really have searched high and low, far and wide, and cannot find the answer to your question, there are many, many very knowledgeable people here just dying to help you out
Welcome to the club...
Oh! And to answer your question: You have to use the Asus Unlock tool, you can use it in JB, no reason to revert to ICS.
If you successfully rooted you won't find the process to unlock, install a custom recovery and flash a custom rom too challenging.
Loosing the warranty sucks, yes. But only a custom rom will unlock the full potential of this tablet.
Sent from my ASUS Transformer Pad TF700T using Tapatalk HD