how to port downgrade kitkat os to jellybean os - General Questions and Answers

i try to downgrade my kitkat rom to jellybean rom but is stuck in bootlogo, i try to port the boot.img of jellybean i replace the kernel and kernel head but still stuck in bootlogo, i replace the init.rc, then my phone are looping in bootlogo, my custom recovery is cwm, i succes to port the cwm of jellybean work to my kitkat os, my problem i like to be jellybean my rom
Please everyone do you know how to downgrade
my reason why i like to jellybean? because i like to try all custom rom of jellybean

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[Q] BOOT.IMG

Help......am using Clone GT-N7100 with the same canvas 2 specs but you know different model.....i have been using most of your devices custom ROM by changing only the boot.img and flash it....but only ICS cuz my devices came with ICS, no update till now....i have been calling the dealer to know if there is any ROM update for my device till now no update.....
So what i need is there any way i can port your device JB boot.img to my device so i that i can use some of your JB custom ROM....I tried to boot your device JB ROM with my ICS boot.img but i didnt boot....
I have attached my device ICS boot.img....I appreciate any help..
THANKS.....
Help
Any patch.....or any procedure to patch the boot.img/kernel to boot JB ROM on my device...:crying:

[Q] Screen stuck in Canvas logo (Booting Issue)!!!

Hi Developers,
I'm using Hardware V1 a110q. i have changed my rom to AOSP KK 4.4.2 from CM11 rom, i followed installation steps.., while rebooting the screen stuck in canvas logo not the boot animation.. i also tried reflashing the rom but there is no luck., then i flashed system partition increase patch, and i reflashed the rom... then it boots successfully...i think it needs system partition.. But in rom thread, mentioned system partiton increase not required...,
My questions is,
1. How to install AOSP kk 4.4.2 rom without changing system partition??
2.Is the new besik_13's kernal supported for CM11, if it supported how to port to the CM11...?

After installing CM13 or based roms stock roms blocked and bootloope occer

Please guys help me ?
I'm using now CM13 rom
But my devise refuse to returns to stock rom or stock based roms
I tried 4.4.4 , 5.0.1 and 5.1.1 smasung stock roms but bootloope happened
I try to install rom from samsung kies but bootloope occur also
I try to remove sim card and wipe everything and install but bootloope occur and Samsung logo doesn't appear
I try to install dn5 v1.0 to v5.0 and sexperiencen4 from v1.0 to 5.0
Also truongtan the new rom also
All of these rom
I want to return to stock Samsung rom or rom like it
Please help me i try everything and have nothing to loss but i need tried way ??? :crying: :crying:

[Q]Port kitkat to jelly bean device

Hello everyone! I'm using a device which is running 4.2.2 (mt6572/512MB of RAM/TFT 854x480 screen). Now i want to upgrade it to 4.4 kitkat so i try to port a 4.4 rom from CLONE DEVICES (mt6572/512MB of RAM too, but different about camera and some small things). I repack kitkat kernel (3.4.67) and stock ramdisk into a boot.img, then replace some file and folder in system/etc, lib, vendor, usr from stock to port. But it can't boot! After the logo appeared, my device stops booting (not brick, not bootloop, not power off). Anyone please tell me how to port4.4 kikat rom for jelly bean device! I saw someone get successfully! Thanks for reading and sorry about my bad English!

Custom rom for MyWigo magnum (mtk6582)

I tried to port rom to my device but it always ends in bootloop, I do not know what I'm doing wrong, there's some rom that's easy to port and that needs kernel stock?

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