[Q] Updating To Overcome ROM 4.0.0

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I have a galaxy tab 7" GT-P1000. I'v installed Overcome ROM v3.1.0 KRATOS. Now, I Want to install (Update) it to the latest Overcome ROM 4 (No-Wipe Edition). But, will this do anything to my settings, apps, files, etc ???. I'v also Underclocked & Undervolted the CPU. Will these remain the same after the update. I just want to update the ROM & keep everything else the same..

It's a no-wipe rom, so all your files and CPU settings will not be affected.