Upgrading rooted phone

o2bnclemson

Well-known member
Nov 30, 2009
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I have a rooted S4, running 4.2.2. How do I best unroot and upgrade to Marshmallow? Or upgrade as much as possible, anyway.... Thanks!
 
Back it up, flash the stock ROM, update, root (if there's a root for the version you updated to), restore.
 
Yes, you need to unroot if you want to do an OTA update or have it flashed. When I rooted my S5, I had to go through several updates to do the final one.

Even not running a custom ROM, the phone sees it that way for updating when you are rooted.
 
Ok, so can I jump from 4.2.2 or am I going to have to do several updates to get to Marshmallow?
 
You might have to reflash a kernel and then go through some updates. Let me see what someone else might can tell you. I'm very limited on rooting experience.
 
The bad news is I think you are probably going to have to go through several OTA updates. You probably can flash them with Odin, but that is going to take a lot of big file downloads. The other possibility.. Once you unroot, you might can use Kies to update, no guarantee though.
 
I don't think Kies will work. It still might see a tampered device. Flashing the stock ROM will probably be the only way to get rid of root completely.