Unlock bootloader needed? - LG Optimus G (International)

I have a stock E977 rooted with IORoot. can I just flash TWRP 3.0.2.0 with Flashify or do I need to unlock the bootloader first?

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LG V500 stock recovery image

Hi Guys,
I searched the forums and only found dead links. I am searching for the stock recovery image for my g pad. Anyone have it?
I am on V50020d, 4.4.2, 3.4.0.
I am rooted (towelroot) and using Flashify. I accidentally flashed TWRP 2.8.0.0 before I unlocked the bootloader. I read that if I try to unlock the bootloader now that I will soft brick my g pad. So I am planning to flash the stock recovery image using flashify and then unlock the bootloader so I can flash TWRP again and then install Slim rom.

[Q] A few questions about Custom ROMs

Hello everyone! I'm not really new to this Android rooting and unlocking bootloader stuff (I did this to my previous Xperia phones) but I'm "new" with it now because I'm now an LG user. I currently own the D855 Global variant.
So here are my questions:
1.) Is it necessary to unlock the bootloader to flash custom ROMs? Or is root enough? (I rooted my phone yesterday and installed TWRP with AutoRec for D855 users) I'm kinda interested with the Cloudy G3 ROM.
2.) Is it necessary to unlock the bootloader to flash custom kernels?
3.) What does bump mean? I haven't heard this term before.
1) No, you do not need to unlock your bootloader on lg g3 to flash Cloudy ROM or other custom ROMs.
You are not even able to unlock the bootloader on this phone currently. If you already
flashed TWRP go get your Cloudy ROM and flash it with TWRP.
2) Again no. Like I said you are not able to unlock bootloader on this phone currently.
But you will be able to flash custom kernels because they are BUMPed.
3) And finally BUMP is a way of signing boot image so it could be booted on LG bootlader without the bootloader itself being unlocked. All XDA ROMS for LG G3 I found here are already prebumped so you are able to download them and flash immediately.
NatusVincere said:
1) No, you do not need to unlock your bootloader on lg g3 to flash Cloudy ROM or other custom ROMs.
You are not even able to unlock the bootloader on this phone currently. If you already
flashed TWRP go get your Cloudy ROM and flash it with TWRP.
2) Again no. Like I said you are not able to unlock bootloader on this phone currently.
But you will be able to flash custom kernels because they are BUMPed.
3) And finally BUMP is a way of signing boot image so it could be booted on LG bootlader without the bootloader itself being unlocked. All XDA ROMS for LG G3 I found here are already prebumped so you are able to download them and flash immediately.
Click to expand...
Click to collapse
Thank you so much! Another question tho, if I flash any stock based custom kernel, how do I get back to stock if in any case I would want to?
Before flashing anything you should always do backup with TWRP or other custom recovery you already have. If you did your backup there, just restore it that way.
In case you did not, you are able to use LG flash tool and flash stock kdz files.
Also you could backup your boot.img(kernel that is...) using app like Flashify and restore it with it if necessary.
And again I recommend doing a nandroid backup with TWRP before flashing anything at all.

FlashFire and locked bootloader

Has anyone attempted to flash ROMs on locked bootloader using FlashFire? Any success with it?

Unlock Bootloader

Is there any way to unlock k012 bootloader? I want to install recovery twrp/cwm or a custom rom may be. Thanks

How to root?

how to root?
Unlock bootloader, flash recovery (twrp or ofox), flash magisk, done.

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