Root [AT&T] Root necessary to install rom?

[aphexacid]

First let me apologize, i'm sure this was mentioned somewhere, but i did not find the info.

I have a refurbished at&t GS3 on the way from at&t, and my intention is to load Cyanogen 10.1 4.2.2 on it immediately before i give it to my mom.

I haven't root or messed with android in a LONG time.

I looked up a couple tutorials on youtube and the one i'm thinking of specifically makes no mention of needing to root first.

Do i have to root the phone first? Or can i just follow this video step by step.

Much appreciated guys!

heres the video: How to install STABLE CyanogenMod 10.1 Android 4.2.2 Jelly Bean on the Samsung Galaxy S3 / III - YouTube

 

[funkylogik]

Long story short
Yeah you need root and custom recovery (CWM or whatever) :thumbup:

P.s, most people dont recommend using Rom Manager on the s3 (i dont know why)

 

[bluebliss]

Yes, as Funky has stated, you need to root your phone first. It's a relatively easy process. Check this thread out and find my instructions further down the page.

http://androidforums.com/samsung-galaxy-s3/736713-lagging-slow-samsung-gs3.html#post5963801

Post back if you need further help. Also, just an inquiry, but why CM10 for the mom? As stable as it is (and I've been running it), the stock ROM is a safer overall bet. Does she prefer the clean UI?

 

[MercilessLTD]

To further what bluebliss is saying, I would recommend, if a clean UI is what you are looking for, you can use a 3rd party launcher to accomplish this. I personally use Holo Launcher HD due to the features available are what I look for. If you want simplicity, this or Nova Launcher would be my suggestions.