Problem in updating a3 - Galaxy A3, A5, A7, A8, A9 Q&A, Help & Troubleshoot

I have a rooted a3 sm-a300h running kk ,when I update it to lollipop ota then reboots to install it gives "errorr" after 25% of installation process , can any one help me ???!
Thanks in advance

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Galaxy A3 touch back stopped after downgrading from lollipop to kitkat

Hello . I upgraded my A3 (SM-A300H) to lollipop. After a while I wanted to return to kitkat because lollipop freezes too much . I have downloaded the kitkat official rom for a300h and then wiped cache and data. Everything is OK but the touch back button and the task view button not worked. after that I reflashed the lollipop rom and worked again . How can I downgrade to kitkat without any errors and the touch buttons working?

G530H Black Screen After OTA Update

Good day, i have a stock G530H KSA variant on 4.4.4 i have updated my device via OTA for android lollipop, but after updating it get past the Boot Logo and won't continue with the boot animation just a black screen. I tried flashing manually via odin but still same problem. I revert it back to kitkat via odin so that i can use it. Can anyone help me to update my phone to lollipop? Thanks mates!
Tried all XXU Firmware to no avail, is there any other method i can update my phone to lollipop or via custom rom? from kitkat to LP. Help me please.

XT1563 security update

Hi. I am running rooted MM6.0.1 version MDP24.107-52 on Brazilian XT1563.
Few days ago I started to receive security update message.
Is it safe to install it or it will brick my phone?
Thx
No, you'll brick it.. you need to be fully stock to install updates.
if only you have install TWRP or another recovery, you will brick
Thx . Any way to stop this annoying message ?

Manual update without losing root

Hello guys, I would like to manually update my Galaxy J5 by flashing the latest updates through Flashfire. Can someone tell me where I can get the files from?
??????

About updating sm-j730f/DS from Android 7.0 to Android 8.1 ?

Good evening, I have some questions taking into account that I am not an expert.
Beginning I own a sm-j730f/ds version Android 7.0 rooted by Magisk, 17.1 stock rom for Egypt:
1-Is it possible to update to Android 8.1 stock ROM for UAE
2. Are there any special steps to update or the normal way is enough by Odin
3-Does root with magisk work without twrp method
And thanks in advance.
Ok......
good afternoon friend you can help me .. so I wanted the back-up of j7 pro .70 twrp without root because I was upgrade to version 8.1 and to have several errors and I can not go back to version 7.0 only by backup
My dear friend, I am sorry unfortunately I can not help, because my device contains root magisk plus that TWRP does not work on my device.
Question why you want to return to Android 7.0. Have you encountered a problem with the new update?

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