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Help with gs3 root

Hey guys. This may have been asked already but i am coming from verizons gs4. and over there you can oly get custom recovery if youre on mdk bootloader.
I just bought this phone for my brother and it came with 4.12 (MG2)
I see everywhere that people were able to get 4.3. i tried updating through phone and through kies and says its up to date. so now my question i guess is what bootloader do i need to be on or what 4.x.x do i need to be on in order to root and get custom recovery to flash custom roms?
any help will be greatly appreciated.

I recommend not updating to stock 4.3 ROM as this will install Knox and you will have a non-downgradeable bootloader. You can use Odin to flash Philz Touch which is based on CWM. From there, you can flash custom ROMs.
Some ROMs require a 4.3 bootloader, but these would tend to be based on the stock Samsung ROM. I am running the latest Validus 4.4.2 on a stock Bell 4.1.2 bootloader without a problem.

audit13 said:
I recommend not updating to stock 4.3 ROM as this will install Knox and you will have a non-downgradeable bootloader. You can use Odin to flash Philz Touch which is based on CWM. From there, you can flash custom ROMs.
Some ROMs require a 4.3 bootloader, but these would tend to be based on the stock Samsung ROM. I am running the latest Validus 4.4.2 on a stock Bell 4.1.2 bootloader without a problem.
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Oh ok. Well I just succesfully rotted and installed latest touch cwm.
so if I stay on 4.1.2 I can basically flash any kitkat roms? Because I dont want to install a tw rom.
So another question what are some good 4.4 kk roms? As in stable for daily use that I could flash
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Most kitkat ROMs will work with a 4.1.2 bootloader based on my experience.
I like the Ground Zero ROMs and use them on the s3, Moto Atrix HD, and Nexus 4.
http://forum.xda-developers.com/showthread.php?t=2550340

[Q] Updating a already Rooted Galaxy S3 that's on 4.1?

I rooted my dad's phone a while back ago so he can use tethering in case of emergencies etc. He recently got a smart watch and I wanted to updated it so that he can use it. But it has not been touched since that day. I essentially want rooted stock rom, I'm unaware of where to find that the closest I can find is StockMod kitkat. Which seems to not work on ATT phones? I just want to make sure that I don't brick his only phone on christmas. So is there something I should be aware of?
His model is SGH-i747
Baseband
i747UCDLK3
Build number
jro03
So how do I go about upgrading it? Can I just flash TWRP and flash any rom using TWRP?
I found this, so I should install new TWRP, then flash a specified kernel then flash rom? would this be safe route?

Some of the latest ROMs require a 4.4.2 bootloader and modem.
The simplest and safest way to get the latest bootloader may be to flash back to unrooted stock 4.1.1 and run OTA updates until the phone is running the latest KK ROM. You can then flash TWRP or CWM and a custom ROM.

audit13 said:
Some of the latest ROMs require a 4.4.2 bootloader and modem.
The simplest and safest way to get the latest bootloader may be to flash back to unrooted stock 4.1.1 and run OTA updates until the phone is running the latest KK ROM. You can then flash TWRP or CWM and a custom ROM.
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Would this require flashing with ODIN? I just want it so that it works with root is not required anymore.

Yes, you would flash the 4.1.1 stock ATT ROM via Odin. I prefer Odin 3.07.
You cannot install OTA updates with root.
You can try flashing just the bootloader and modem but I prefer the long slow route of OTA updates.

I rather do it this way, manually so my dad can enjoy it today. I was wondering how can I update it's TWRP? it's at 2.3 but the TWRP manager keeps crashing when I update it.

I highly recommend the latest d2lte version of Philz Touch for recovery.
https://goo.im/devs/philz_touch/CWM_Advanced_Edition/d2lte/

Ok I ****ed up, flash that kernel and did whatever and bam ****ed up. Not working... ****, I still ahve download mode and Recovery but it will not boot into the OS. I get a flash of samsung and then nothing else happends...****
I decided to flash stock DLK3 in odin. Then let the updates take it course (my dad doesn't need root) Where Can I find the file?

The stock ATT firmware is on sammobile.com.
If you want root, OTA to the latest 4.4.2, install Philz, flash supersu via recovery.

[Q] help with official gpe lollipop....

So i updated to official 5.0... http://forum.xda-developers.com/showthread.php?t=2774289. But i am confused on as how instal twrp recovery and such....as its so new and dont want to brick my phone...i have installed it previously and flashed many a rom and kernals...but i know this has some news stuff...no dalvik....any advice so i can get back to flashing new custom 5.0 roms?

You still have M919 bootloader, so just flash a recovery with Odin
Edit: the only thing that you updated to 5.0 is the system and kernel

serio22 said:
You still have M919 bootloader, so just flash a recovery with Odin
Edit: the only thing that you updated to 5.0 is the system and kernel
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Click to collapse
so basically i didnt have to flash that to start flashing lolipop roms huh.....lol....i thought i did because i had so much trouble with nb4 roms... thought had to update something like modem...thank you. i will have new rom soon... nice.

[Q] bootloader question

Im on stock image 4.3 with root. I just installed TWRP 2.8.6.0 version for 4.3 . As I was looking at the rom's the majority of them want me to be on bootloader 4.2 or 4.4 before I can use the rom. What is the safest and easiest way to get there? the last time I modded a phone was with my HD2.
sorry for the noob question. I have been out of the loop for a while.
Thanks
Freak

If I goto sammobile to download N900TUVUENK3 and flash it with odin would that give me the boat loader I need? also would I need to upgrade twrp at that point? is there a document that covers this? any help would be appreciated.

Yes just be total stock 4.3 then flash the N900TUVUENK3 rom using odin and you will be able to flash any 4.2, 4.4, or 5.0 rom available. You just have to be 100% stock to do it including recovery. After you install the new rom then you can root it and install any custom recovery you want. Thats what I did. Revert to total stock, flashed the NK3 rom, rooted, then installed recovery. After that you will have a 4.2. bootloader and will be to install any rom out there. Hope this helps you out.
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thank you. that worked like a dream

[Q] Need help! Steps on installing lollipop with custom recovery + root

Hi guys,
I'm not sure exactly where to look for the steps because I'm in a unique situation or atleast I think I am. I need help on installing the LOLLIPOP firmware (N900TUVUFOB6) with a custom recovery and root. I am currently on a rooted note 3 v4.3 with the N900TUVUBMI7 baseband version.do I need to update my bootloader to a newer version? Should I atleast do a stock update to 4.4? Should I be using which custom recovery?
If I'm correct, I can't just flash the latest custom recovery and then flash the newest lollipop (for example the newest TEKHD like this link http://forum.xda-developers.com/showthread.php?t=2672393
Or can I? What If I just did a normal software update to upgrade me to lollipop, will the bootloader be blocked, disabling me from installing a custom recovery since I would want to root as well. And then would I be able to resume the steps from TEKHD instruction?
Thanks!