J330F downgrade - Samsung Galaxy J3 (2017) Questions & Answers

Hi. I accidently updated my J3 to android 9 and since then, the phone works like my old Samsung S4 mini. Everything is lagging, in short phone is just unusable. I know that trying to downgrade via odin you get anti rollback protection because of the bootloader so is there any other way how to downgrade it to older version? I don't care if it's easy or hard way, i just want to make this phone usable. Maybe flashing older rom with keeping new bootloader? I heard someone did that once to A7 2018 but never published this rom.

I downgraded my SM-J330F (with unlocked bootloader) from Pie (9) to Nougat (7) using Odin.
To unlock the bootloader on a J3 is very easy. Go to Developer Options and activate OEM unlocking. That's it.
If it's somehow missing, use this:
[OFFICIAL][TOOL][WINDOWS] ADB, Fastboot and Drivers - 15 seconds ADB Installer v1.4.3
15 seconds ADB Installer v1.4.3 ADB, Fastboot and Drivers What is this? This is All-in-One installer for 3 most needed PC tools for Android. No need to download big SDK for 3 small things. I originaly made it for my Kurdish friend AnGrY DuDe in...
forum.xda-developers.com
You can find a how-to here:
Unlock Bootloader on Samsung Galaxy J3 2018? OEM Unlock!
Hey, there in this guide, I will show you the easiest method to Unlock Bootloader on Samsung Galaxy J3 2018. This smartphone was recently launched, and in
www.rootingsteps.com

my thread may help you
[A320FL] Downgrade Android 8 to 6.0.1
So i just succeded in downgrading my A3 by flashing boot.img and system.img through OrangeFox recovery, theres not much more to it(and magic probably). The phone initially didn't boot and just bootlooped not even showing the boot animation only...
forum.xda-developers.com

Related

Galaxy S6 Secure check fail : (recovery) help, installing TWRP

I have been trying for about a month to root and atleast boot this SM-G920V to a rom I dont even care if it's rooted but anytime i try to follow a youtube video exactly it still ends up failing i have used adb to boot to bootloader then turned off phone booted into download mode to bypass the secure download but it still says SECURE CHECK FAIL : (RECOVERY) I don't quite understand why Verizon just has to be so difficult but this may be a dumb question is there anyway to actually switch the model of this phone without just changing that file that displays it to thus switch it to a root compatible version or will changing that actually make the phone compatible I don't know if anyone has any tips as to booting this verizon galaxy s6 nougat 7 to a custom rom or even rooting though I was told that the verizon models are incompatible for unlocking bootloader but I know theres ways of booting to roms without unlocking bootloader though you need root is there anyone that doesnt need root or unlocking bootloader I have also tryed the old ping pong method and that still failed. please let me know if you have any knowledge of any of this thank you in advance
No way for custom rom.
Flash the latest official, install Package Disabler app and get rid of the bloatware.
Then enjoy the phone.

How can I remove FRP locked?

Hello dear XDA community,
as new user here I was very excited to find this great platform and have learnt finally how to improve privacy on my samsung... I installed TWRP, successfuly rooted by Magisk, added Xposed, Xlua Privacy... all was good until... My phone didn't become FRP locked... Probably locked the device when I was trying to log into google account because of WhatsApp backups
I tried to get to download mode and flash it by Odin in this download mode but process failed, FRP locked appeared and... before when I was recovering system by TWRP I was successful but second time probably OEM was turned off and that's why I have a problem now
could you please advice me any software which with I can get rid of this FRS lock from download mode? I don't mind to pay also for this software but I am worried about fake software...
My problematic mobile phone Samsung Galaxy A5 Duos (2017) SM-A520F/DS - It is dual sim phone (It is international version of A5)
Android: Oreo 8.0.0
Serial Number: R58K24KNKKR
Build Number: R16NW.A520FXXS8CSB1
Please give me an advice
thank you
The only way I have been able to do this is to flash an egnineering bootloader and then run an adb command that wipes the security then reflash your bootloader, load your ROM from recovery, and reboot.
any guidance how to flash an egnineering bootloader and then run an adb command please?
Thank you for you advice

Unlock BOOTLOADER G930P 8.0 OREO B11

Hello community, I have the Samsung Galaxy S7 Model: G930P, Android 8.0 Oreo, Firmware: G930PVPSBCTA1, Binary 11 and I have been researching how to have ROOT access on this device but unfortunately there is nothing, no data, it cannot be DEGRADED because of Binary 11, already that there is no other FIRMWARE of the same that has compatible BINARY, only the current one is the only one with BINARY 11 and other "FIRMWARES" such as "G930U" on this updated version and the problem is in the BOOTLOADER BLOCKED, and seen in other Android cell phones They unlock manually with ease before entering DOWNLOAD MODE without the need of the PC and I tried to do the same but it does not work just start the DOWNLOAD MODE, I thought that G930P would do the same but it was not like that, I will leave you a reference image of this, If anyone knows something about this topic please answer me, since I need ROOT Access.
Unlock BOOTLOADER G930P 8.0 OREO with or without PC?
I have the same model and I need solution too
Sorry for bad English

SM-G930V

Greetings My Brothers. I have a huge Problem. Sometimes ago I got a Samsung Galaxy S7 Verizon Model, thought it will be cool to have such a model, just come to think of it; Snapdragon 820 what else did I wanted again. And the phone started running Berserk. apps downloaded and installed from PlayStore don't work at all even WhatsApp does work properly. The phones freezes all the Time, it overheats all the time. So I made a decision. root, install custom recovery and install Custom Rom like lineage OS. I'm accustom to those stuffs like Odin, download mode, etc. I don't have any problem with a phone stock on boot loop, it's something I have been fixing, so I'm Used to It. My SM-G930V security level is High with its latest android version Oreo, the bootloader is locked. tried to unlock it with ADB and Command Prompt. It was a failure. tried to get some help On YouTube. Failed, all the videos I watched was about SM-G930F none of them talked about SM-G930V, I came across SM-G930V bootloader Unlocking, rooting and custom Rom but, it wasn't compatible with my SM-G930V. So let Me ask You Guys this question. Can I really unlock the bootloader, root the phone and Install a custom recovery, and A custom Rom??? If there is a slight chance or possibility of doing so, please Brothers help me out, because I am unable to use the phone to its full potential. Thanks. Michael.

Odin stuck on boot.img

Hi, I have an SM-A515F Android 12
I have been trying to root my phone since it is out of warranty and I'd like to use the DualClockModule
But the catch is, it keeps getting stuck on boot.img
Now, I am a noob to this but I followed this guide:
GUIDE -- Root A515F with android 12 -- GUIDE (no custom Recovery)
Has anyone a good Guide/Tut to Root the A51 (Android 12) with the Original Samsung Firmware? SEE Next Post Thx Regards Alex
forum.xda-developers.com
Can someone please suggest me something?
USB debugging is on
OEM is unlocked
I only have the phone connected to my laptop's USB port. All versions (magisk and odin) are latest.
I do not feel like giving up..

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