Upgrading rooted phone

[o2bnclemson]

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!

 

[Rukbat]

Back it up, flash the stock ROM, update, root (if there's a root for the version you updated to), restore.

 

[o2bnclemson]

I'm using the stock ROM. Do I even need to unroot?

 

[Kelly Kearns]

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.

 

[o2bnclemson]

Ok, so can I jump from 4.2.2 or am I going to have to do several updates to get to Marshmallow?

 

[Kelly Kearns]

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.

 

[Kelly Kearns]

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.

 

[Golfdriver97]

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.

 

[Kelly Kearns]

Oh no I mean Kies after the unroot part. Kies will see root for sure.