stock boot image help - Samsung Galaxy J3 (2016) Questions & Answers

so i just got this phone, trying to flash magisk but i need the stock boot image, how do i find that?

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[Q] 4.4 stuck at boot animation

Hi,
I managed to use Nexus 7 toolkit to flash 4.4 over my old CyanogenMod install. I had trouble using the Google stock image and it kept getting stuck trying to flash radio. I used the flash tool to write to each partition Bootloader, System, and Boot. This allowed me to boot into 4.4 and everything looked good.
However, after the next boot I get stuck at the boot animation and it just won't move forward! I can reflash bootloader, system, and boot, and everything works fine, but it will always hang after the first boot.
Help!
Rassilon7 said:
Hi,
I managed to use Nexus 7 toolkit to flash 4.4 over my old CyanogenMod install. I had trouble using the Google stock image and it kept getting stuck trying to flash radio. I used the flash tool to write to each partition Bootloader, System, and Boot. This allowed me to boot into 4.4 and everything looked good.
However, after the next boot I get stuck at the boot animation and it just won't move forward! I can reflash bootloader, system, and boot, and everything works fine, but it will always hang after the first boot.
Help!
Click to expand...
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Not to worry, I am an idiot! Was trying to install the mobile version on a wifi unit. Downloading the correct factory image now.

Lack of recovery

Hey guys, I'm a longtime XDA browser but hardly ever post. I have the MXPE rooted with the newest TWRP build and has been running great since I got it. last night flashed the Deodexed 6.0 build from AICPs 5.1.1. I had some issues with the SD card being mounted as internal storage and erasing something so I tried to flash back to stock as my nandroids weren't seen as usable.
Long story short when I flashed back to stock, the recovery would never take. I've flashed the stock recovery and twrp to no avail. For some reason it wont actually stick. Everything else is back to stock but that. When I used the win toolkit and tried to flash twrp again it said something about the folder locations so I'm wondering if I messed something in the partitions.
Question is, have you guys ran into this issue or have any insight on where to go from here? I've looked around but I couldn't find a post that the same as this issue. As a side note, I can get into the bootloader just fine.
I appreciate any info that someone can provide.
Flash twrp. Reboot back to recovery from recovery. Reboot system.
Hopefully it's that easy. Stock os flashes stock recovery on boot. Rebooting recovery from recovery prevents that from happening.
From TWRP:
"Note many devices will replace your custom recovery automatically during first boot.... Once TWRP is booted, TWRP will patch the stock ROM to prevent the stock ROM from replacing TWRP. If you don't follow this step, you will have to repeat the install."
mxpe 6.0
Thanks for the info ffejy462. What happens when I try to flash TWRP and it doesnt stick? I know for a fact that I can boot into it temporarily with fastboot boot and the recovery file. Should I just flash it from there?
THEFILLTER said:
Thanks for the info ffejy462. What happens when I try to flash TWRP and it doesnt stick? I know for a fact that I can boot into it temporarily with fastboot boot and the recovery file. Should I just flash it from there?
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I'm sorry I didn't see this sooner. Flash recovery with fastboot. Boot into recovery. From reboot menu in recovery, select reboot recovery. Twrp will patch so recovery isn't lost again.
mxpe 6.0
That did it. thanks alot ffejy462!

TWRP 2.9.7.0 to hybrid twrp inorder to put RR rom.

Hi ! as stated above im on 2.8.7 twrp but i need to put that sick RR rom, so I was wondering how to install hybrid twrp. I tried using the flash image thing on twrp to install that image and selected recovery partition between that and boot partition, but that didn't really work. I fastboot didnt help either, so since i didnt find any tutorial i was wondering if you pro's could help
what you mean by didn't really work?what the error message when flashing the recovery?
maybe the recovery file is corrupted, you maybe need to redownload it again and reflash it

Restore from LGUP dump / stuck in TWRP loop

Hello so I'm trying to restore my LGV20 H910 from the original dump I made prior to rooting my phone.
Currently my phone is stuck in a TWRP loop after I tried to reflash the v10r rom from https://forum.xda-developers.com/v20/development/h910-return-to-stock-v10m-t3669956
I managed to reflash that ROM successfully once earlier, then realized I forgot to flash Magisk and went backwards to try again... then it said something like the ROM couldn't boot because of some encryption problem... and now it's just stuck on TWRP. I want to reverse everything and go back to unrooted stock as I've been having problems with my phone in terms of signal and also apps just randomly crashing or the entire phone freezing.
So the dump I have is missing the META-INF folder and also all the files have _COM11 at the end of them. What should I do to create a fully flashable ZIP? And if this doesn't end up working (i.e. still stuck in TWRP loop) what should my next steps be?
edit: don't need help with the twrp loop anymore, used the rom here https://forum.xda-developers.com/v20/development/h910-return-to-stock-v10m-t3669956 but i am still interested in being able to use my old dump

Unroot and revert to Stock with bootloader locked

Hi! I am on 11.0.7.7. i rooted my phone by modding the boot img via magisk. I flashed the boot .img on both partitions i.e. a and b. Now i want to revert to stock and unroot. I have the stock boot img with me. Please guide me how to do it? Should i flash stock boot img on both partitions again? Or should i simply flash the boot img without mentioning a or b partition? Please help me out. Thanks
Uninstall Magisk then reboot your phone, you will get back to unroot stock OOS11.
Beachwalkerr said:
Hi! I am on 11.0.7.7. i rooted my phone by modding the boot img via magisk. I flashed the boot .img on both partitions i.e. a and b. Now i want to revert to stock and unroot. I have the stock boot img with me. Please guide me how to do it? Should i flash stock boot img on both partitions again? Or should i simply flash the boot img without mentioning a or b partition? Please help me out. Thanks
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Easiest way is MSM.

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