rom toolbox

These types of questions are best posted in the Rooting, ROMs and Hacks section...

Moving this post so you can get the best results to your question.
 
I've tried it cautiously did a backup first, from experience and forum repeats always do a nandbackup before using anything that needs root.

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These types of apps have been known to cause bricks. I wouldn't recommend it unless you really know what you're doing.