Originally Posted by TwasBeats
I have an unlocked (debranded) romanian N9005 currently rooted using Mobile Odin Pro with Knox intact on 4.3 MJ7. With the current release of 4.4.2, I read that I need to update the bootloader if I flash it using MOP or else I'll experience bootloops.
Updating the bootloader won't be so bad assuming I'll be at least able to update to newer options with root and Knox intact since other then App Ops I can't think of any reason to downgrade to 4.3. But my worry is that once I update the bootloader, if I will ever have to turn my phone for a repair (presuming it will be something that's not caused by my modifications) I won't be able to re-root my phone without tripping Knox (since even without having Knox tripped I'd have to get rid of root before handing it to Samsung) because I won't be able to downgrade to 4.3 so I can re-root using URLDV. So basically, I also want to know if it's possible and worth waiting for a supposed method to downgrade to 4.3 that's somehow dependent on this bootloader I have. This is my first Android phone and that's why I'm not very familiar with what developers can do for these kinds of situations.
Chances of downgrade happening in the future are slim to non existent.
Upgrading, via Odin to Official ROM won't hurt your phone. - If you update the bootloader you Must upgrade the ROM also.
You won't be able to re-root your phone unless you update via Mobile Odin - correct.
The people of XDA, including the Devs. Do not have to help you. We all choose to help. Everyone also starts somewhere.
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CM11 N9005(Note 3) - Nexus 5(D821)