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Jelly Bean for the Galaxy Nexus

I want to put Yakju on my device but was worried.... If I need to bring in the phone for warranty service, unroot and restore to factory, will I be able to find a yakjux image? Is that even necessary?

(apologies: noob)

After you unlock the boot loader and root, you can use cwm or twrp recovery to make a backup of the stock os. Move the backup to your computer for safe keeping. If you ever need to return to stock, re-flash the stock backup in that recovery, then lock and unlock the boot loader again to wipe out the root, and finally lock the bootloader a second time to get back to total stock.
 
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After you unlock the boot loader and root, you can use cwm or twrp recovery to make a backup of the stock os. Move the backup to your computer for safe keeping. If you ever need to return to stock, re-flash the stock backup in that recovery, then lock and unlock the boot loader again to wipe out the root, and finally lock the bootloader a second time to get back to total stock.

Thank you this puts me at total ease
 
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