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How to restore Samsung Galaxy S4 to offical

Hi,
I have an original Samsung Galaxy S4. It has been updated to original 4.4.2 KitKat. This firmware is very wrong (slow, and battery runs out very soon).
I want to downgrade it to previous 4.3 firmware.
My problem is that Write protection is enabled on the device.
Could you help me how I can disable write protection, flash the 4.3 firmware and restore it to official?
I already downloaded the original 4.3 firmware which is appropriate for my device.
Thanks a lot!
KR

You can't downgrade. Android 4.4.2 have new bootloader and isn't possible take it back to android 4.3 :fingers-crossed:

Thanks a lot!

piedone said:
Hi,
I have an original Samsung Galaxy S4. It has been updated to original 4.4.2 KitKat. This firmware is very wrong (slow, and battery runs out very soon).
I want to downgrade it to previous 4.3 firmware.
My problem is that Write protection is enabled on the device.
Could you help me how I can disable write protection, flash the 4.3 firmware and restore it to official?
I already downloaded the original 4.3 firmware which is appropriate for my device.
Thanks a lot!
KR
Click to expand...
Click to collapse
Today I went to an official Samsung store to tell them about the same, about how bad KitKat has been performing on my phone ever since I got it. I know for a fact that they can downgrade firmwares, but the girl told me that Samsung pulled 4.3 from the system. But I think this was only the one for the unlocked version here in Spain. You might get lucky and they might still have the one that works for your carrier or something.
Try that if you want and let me know if it worked for you... meanwhile I'll live in pain with my 4.4.2 FW.:crying:

[Q] downgrade to 4.4.2

recently I upgraded to lollipop 5.0 using odin and Russia firmware. But the RAM usage has gone nuts. Performance is not as smooth as before. I want to downgrade to 4.4.2 kitkat... How can I do that? Which firmware should I use?

Just install kk thru odin...

Dark_Dreams said:
recently I upgraded to lollipop 5.0 using odin and Russia firmware. But the RAM usage has gone nuts. Performance is not as smooth as before. I want to downgrade to 4.4.2 kitkat... How can I do that? Which firmware should I use?
Click to expand...
Click to collapse
Click on my signature and follow the instructions, just substitute the correct version of KitKat for your device. You find the right KK OS at sammobile the links for everything are in my instructions. The procedure is the same just the KK OS is different. Enjoy !!!

does the firmware of different country make any difference???

Well it sure does
Dark_Dreams said:
does the firmware of different country make any difference???
Click to expand...
Click to collapse
It could impact few bugs show or not, for example i flashed official UK version even if my country is far from there because kit kat was kinda most stable as UK version when i wanted to upgrade from 4.3. As far as lolipop is concerned it should use less ram than KK. You should give a try to some custom rom as you can find it even more stable than the official one. I personaly used X note as a official rom without triping knox. After i tripped knox i cant settle with 1 rom for about a year i think...

Isn't L more efficient?
I honestly thought that Lollipop was supposed to be more efficient.
Why would it be taking more RAM?
On that note, will anyone recommend a better aftermarket ROM with S-pen capabilities in 2015 for 900W8 version at least?

Mak-B said:
I honestly thought that Lollipop was supposed to be more efficient.
Why would it be taking more RAM?
On that note, will anyone recommend a better aftermarket ROM with S-pen capabilities in 2015 for 900W8 version at least?
Click to expand...
Click to collapse
I also thought the same.... But there were other problems too...bATTERY DRAINED TOO QUICKLY.... Apps crashed frequently.... Overall performance was really disappointing...

Lollipop update on Galaxy GT-i9515

Hi everybody,
I need help with my rooted Samsung Galaxy S4 Value Edition (gt-i9515, running 4.4.2). I'd like to update it to lollipop and I can't find any specific tutorial for the i9515, which for some reasons seems to be different from the basic i9505 version. I'm running the official rom, since there isn't any support for custom roms on the i9515.
Somebody help me please

Official Update
Hello, no need to do anything guys,
just go to Settings / Check for Updates, it will automatically download the official Samsung Update to lollipop 501
From France
GT-i9515 Official Lollipop 501 [LRX22C.I9515XXU1BOC3]
BlackDjango said:
Hi everybody,
I need help with my rooted Samsung Galaxy S4 Value Edition (gt-i9515, running 4.4.2). I'd like to update it to lollipop and I can't find any specific tutorial for the i9515, which for some reasons seems to be different from the basic i9505 version. I'm running the official rom, since there isn't any support for custom roms on the i9515.
Somebody help me please
Click to expand...
Click to collapse

Thank you for your answer, but I had already tried the official way before posting and it didn't work because the phone is rooted

BlackDjango said:
Thank you for your answer, but I had already tried the official way before posting and it didn't work because the phone is rooted
Click to expand...
Click to collapse
Download the ROM from sammobile and flash it with Odin. You will need to re root and please bear in mind that xposed currently does not work on Samsung Lolipop ROMs

SeraphSephiroth said:
Download the ROM from sammobile and flash it with Odin. You will need to re root and please bear in mind that xposed currently does not work on Samsung Lolipop ROMs
Click to expand...
Click to collapse
Thank you very much, I'll try that!! :good:

I just realized that the GT-9515 is not even mentioned between the s4 models, hence there's no firmware available to download. How do I solve this now?

Need help installing Stock ROM on Samsung s4

Hello,
I have a samsung galaxy s4, i337 locked by ATT. My current android version is 5.0.1 and my baseband version is I337UCUGOC4. Can you please give me detailed steps or link on how I can install stock android by google the latest version 5.0.1 or later. This is my first try and I have read alot of threads but I am getting confused so wanted some clarification may be with screenshots would be great.
Any help appreciated.
Thanks

kaleend101 said:
Hello,
I have a samsung galaxy s4, i337 locked by ATT. My current android version is 5.0.1 and my baseband version is I337UCUGOC4. Can you please give me detailed steps or link on how I can install stock android by google the latest version 5.0.1 or later. This is my first try and I have read alot of threads but I am getting confused so wanted some clarification may be with screenshots would be great.
Any help appreciated.
Thanks
Click to expand...
Click to collapse
To clarify: Stock means unchanged ROMs, you in fact are now on the latest stock ROM for your device and carrier (AT&T and TouchWiz).
Since AT&T locked the device bootloaders, it's impossible to flash Google ROMs on it (that version needs a different kernel and that's where the bootloader comes into play).

Thanks for the clarification. I prob. misspoke in that case. I wanted to install custom ROM but one which is out of the box given by google without all the samsung apps and stuff. Prob similar to what is on Nexus at this point.
Thanks

help with my samsung s4

hello and i want ask for advice. my samsung s4 currently android base 4.4.2 and it need unroots first for upgrade to 5.0.1. it take many data to download it. if i skip from download 5.0.1 and i download new customs in 6.0.1 android. can or not?

You can't get OTA updates unless your system status is official.

subcrew013 said:
hello and i want ask for advice. my samsung s4 currently android base 4.4.2 and it need unroots first for upgrade to 5.0.1. it take many data to download it. if i skip from download 5.0.1 and i download new customs in 6.0.1 android. can or not?
Click to expand...
Click to collapse
Yes you can flash different / custom rom
Sent from my GT-I9505 using Tapatalk