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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] SM-N9007 (Aus/Optus) KitKat

Don't know if any body has noticed, but kit kat seems to have been sneakily released for us australia note 3 holders of the n9007 model.
I don't know if its available officially yet, as I can't check because I rooted the 4.3 firmware, however I am currently downloading the 4.4.2 firmware from sammobile.
Now this leads to my actual question,
Seeing as we now have the 4.4.2 firmware and modem, would we be able to flash n9005 roms onto our n9007 note 3's and simply swap the modem?
I read somewhere that someone had success flashing, with everything working except the modem.
If any other n9007 would like to hit up the new firmware and share feedback that'd be great

domokorean said:
Don't know if any body has noticed, but kit kat seems to have been sneakily released for us australia note 3 holders of the n9007 model.
I don't know if its available officially yet, as I can't check because I rooted the 4.3 firmware, however I am currently downloading the 4.4.2 firmware from sammobile.
Now this leads to my actual question,
Seeing as we now have the 4.4.2 firmware and modem, would we be able to flash n9005 roms onto our n9007 note 3's and simply swap the modem?
I read somewhere that someone had success flashing, with everything working except the modem.
If any other n9007 would like to hit up the new firmware and share feedback that'd be great
Click to expand...
Click to collapse
I've done this on many N9005 custom roms without any issues (NO MODEM ISSUE to speak of). All you need to do is update to 4.4.2 for the N9007 so that you have the kitkat bootloader and modem then you can flash any of the N9005 custom roms as you please. I've flashed these roms in the past without any issue (ASSASSINROM V4, CRASH ROM V13, N9005XXUGNG1_DevBase_alexndr.zip AND CRASH ROM V15 CURRENT)

So you can use 9005 ROMs even if you have a 9007 as long as it's 4.4.2?

In short yes. The baseband of your 9007 must match the 9005 custom rom you want to use ie. to use 9005 custom rom on 4.4.2 you need to upgrade your 9007 to 4.4.2 first.

Sorry but would you be able to provide us with a short tutorial on how to do so?
As far as I can tell, there is no way to root N9007 4.4.2 at the moment.
I realise some roms can be flashed with odin, but I'm still kind of wary as to whether or not it will be compatible.
You mentioned having the same basebands, but on my N9007 the baseband version shows as "N9007DIUCND1"
Is the DIUCND1 part the part I need to look out for while searching for N9005 custom roms?
Thanks for the help

domokorean said:
Sorry but would you be able to provide us with a short tutorial on how to do so?
As far as I can tell, there is no way to root N9007 4.4.2 at the moment.
I realise some roms can be flashed with odin, but I'm still kind of wary as to whether or not it will be compatible.
You mentioned having the same basebands, but on my N9007 the baseband version shows as "N9007DIUCND1"
Is the DIUCND1 part the part I need to look out for while searching for N9005 custom roms?
Thanks for the help
Click to expand...
Click to collapse
OK...from the information you've provided...you're on 4.4.2 for the N9007 if not update your firmware to this version. To root simply use TOWELROOT (http://forum.xda-developers.com/showthread.php?t=2793071) then install recovery app...either CWM or TWRP - I've been using TWRP 2.7.2.0 without a single issue. Then chose and install an N9005 custom rom via TWRP or CWM. I've installed and used the following roms without any issue (Echoe ROM v15, Alexndr - N9005XXUGNG1, ASSASSIN_V4, CRASH_ROM_V13 and CRASH_ROM_V15)...the only thing you cannot do is install bootloader and modem belonging to N9005.

Fantastic. I have yet to install a custom rom, but I am ecstatic just knowing that my phone is finally rooted again.
Hated that I couldn't downgrade from kitkat back to jb, but only because I wasn't aware of any way to root my device until now, many thanks!
I shall post again once I try out a few roms and see how they go.
Thanks again, you've been most helpful!

Sorry, would you be able to link me to the correct TWRP for the N9007? or the one that is compatible with it?

try this one http://forum.xda-developers.com/showthread.php?t=2467001

.
Hi there,
I'm just wondering if anyone could provide me how to root my galaxy note 3 n9007 Kit Kat? I tried CF-Auto-Root but after i flashed with odin it just stuck in bootloop.
I also would like to try custom firmware, is it possible to install onto this phone?
I got one more question do i need to unlock bootloader?
How can I check my bootloader status?
Thanks for your answers.

Blizzard13 said:
Hi there,
I'm just wondering if anyone could provide me how to root my galaxy note 3 n9007 Kit Kat? I tried CF-Auto-Root but after i flashed with odin it just stuck in bootloop.
I also would like to try custom firmware, is it possible to install onto this phone?
I got one more question do i need to unlock bootloader?
How can I check my bootloader status?
Thanks for your answers.
Click to expand...
Click to collapse
Look at the fourth post above yours....everything is explained there and the posts that follow....

tpham01 said:
Look at the fourth post above yours....everything is explained there and the posts that follow....
Click to expand...
Click to collapse
I too have this issue and as explained clearly you cannot use the N9005's BL or CL on a N9007 device - it causes a bootloop or stuck on logo.
I cannot find the BL or CL for Australia (optus) anywhere, not even an older version.

Flash latest stock firmware for BL etc.

Samsung S5 - Lollipop - can i downgrade back to KitKat

Hi Guys,
I stupidly got excited and installed the official Lollipop (S5 on THREE UK network) update when i was notified.
BUT...
I want to go back to KitKat as i preferred it (i wont go into reasons why)
Is there a downgrade path for me, either officially or unofficially?> I dont think there is at the moment.
Thanks guys!

Yep, this forum is literally packed with instructions on how to do it, a simple search will bring up what you need

hi thanks, i thought with the new protected bootloader i didnt think it possible.
this is what i read:
Note: The G900FXXU1BNL9 Android 5.0 Lollipop update comes with a protected bootloader it is clearly emphasize that the “SE for Android Status – Enforcing” that might cause issues when you try to downgrade to the old software updates. This also applies if you are planning into rooting and installs any custom recovery and any unsigned firmware once you are on Android 5.0 Lollipop , so please be aware with that.

manikm303 said:
hi thanks, i thought with the new protected bootloader i didnt think it possible.
this is what i read:
Note: The G900FXXU1BNL9 Android 5.0 Lollipop update comes with a protected bootloader it is clearly emphasize that the “SE for Android Status – Enforcing” that might cause issues when you try to downgrade to the old software updates. This also applies if you are planning into rooting and installs any custom recovery and any unsigned firmware once you are on Android 5.0 Lollipop , so please be aware with that.
Click to expand...
Click to collapse
Yesterday I tried out AllianceROM 6.0 and a few hours ago I went back to 4.4.2 'cause I liked it better than Lollipop. Here's what I did :
1. Enter Download Mode and flash STOCK 4.4.2 KitKat firmware in Odin (I used 3.10.6) and let it start booting.
2. It won't boot, this is normal (I panicked when this happened though ).
3. Go to recovery and factory reset/wipe data your phone.
4. Now hit reboot in recovery and your phone will boot up again (YAY :sun.
5. OPTIONAL : If you've made a nandroid backup before going to 5.0 you can now flash TWRP and restore it over your STOCK 4.4.2 KitKat firmware.
Hope I helped Let me know if it works out for you!

SUCCESS!!!
All sorted.
The hardest part was finding a link to the rom. sammobile kept giving me a gateway 502 error.
im now back to kitkat, AND no THREE UK rubbish.

manikm303 said:
SUCCESS!!!
All sorted.
The hardest part was finding a link to the rom. sammobile kept giving me a gateway 502 error.
im now back to kitkat, AND no THREE UK rubbish.
Click to expand...
Click to collapse
Lol.....so which firmware did you flash? I'm with 3 as well......though for me, all the 3 c**p was frozen with TiBu as soon as I rooted (along with 100+ other 'system' apps too)......I don't want/need all that knox/Samsung/Google rubbish either.......lol
Sent from my rooted kn0x0 SM-G900F S5

I used a stock Samsung 4.4.2 btu mate...took me forever to find a good link though
Still got the Samsung rubbish on it though but I prefer an official rom to a 3rd party one.

Guide me Please
manikm303 said:
I used a stock Samsung 4.4.2 btu mate...took me forever to find a good link though
Still got the Samsung rubbish on it though but I prefer an official rom to a 3rd party one.
Click to expand...
Click to collapse
Okey so i want to downgrade mine s5 from Lolipop to Kitkat 4.4.2. But i wonder if i breaks my varanty and can you make like an min guide and add the links you used also please
Would be really helpful since i'm not sure on where to download the things required. And can i get the Stock samsung 4.4.2, whitout messing up anything, incase i turn my phone in for repairs some time and what not. (cause they can complain that you have touched up stuff in the programs ect )
i appriciate any help peace

answer
hey guys i just followed this tutorial to downgrade it was so easy took several minutes now im running kitkat again yaaay
https://www.youtube.com/watch?v=glNRCuH4Yyw

how to upgrade to lollipop

does anyone know the easiest way to upgrade my Note 3 from 4.4.2 to Lollipop. never done this before so not sure on best way to go about this or where to get the files needed

iancarr said:
does anyone know the easiest way to upgrade my Note 3 from 4.4.2 to Lollipop. never done this before so not sure on best way to go about this or where to get the files needed
Click to expand...
Click to collapse
Use odin program. Download files from sammobile. Com
Download for your version.
Read some more ^^

what is best way to ensure correct version

Bootloader is N9005XXUGNI4
Baseband is N9005XXUGNL1
PDA is N9005XXUGNI4
CSC N9005OLBGNL1
it says 4.4.2 is current however everyone else I know has 5.0 Lollipop
how can I update this to lollipop

better dont
You should wait a bit more and stick to the kit kat since lollipop is not polished an fixed entirely for average use. Don't get me wrong but if you don't know how to do it better don't do it yet because it can provide problematic install and/or bootloop. Even Samsung official update is stopped because of lollipop problems.
Cheers!

When you search for sm-n9005 in sammobile firmware section, download open German lollipop (not carrier ones). When you download firmware, there you can see how to install as the instructions are there. Gl

kenny1991 said:
When you search for sm-n9005 in sammobile firmware section, download open German lollipop (not carrier ones). When you download firmware, there you can see how to install as the instructions are there. Gl
Click to expand...
Click to collapse
mine Is showing as philipines version but unlocked and using on O2 in UK, will the german version not be incorrect for this

[Q] What model (version) of s4 is exactly this?

What model (version) of s4 is exactly this phone? which software is installed on it? is it stock or not ? plzz help and tell me its complete version details

My phone is sgh-i337 or gt-i9505 ? Or only baseband version is i337...or any firmware version difference ? Help

Open the back and remove the battery. Look on the label. Unless the person who sold you the phone physically changed the label, or removed it, it will accurately tell you the hardware version of your phone.
Given that the boot loader and modem (baseband) are for the AT&T version, SGH-I337, it seems likely that the hardware is I337.
Edit: Also, check that it's not a cheap fake clone. There are apps that can check hardware, and run benchmarks, etc. Search "Genuine Galaxy" on the play store.

creepyncrawly said:
Open the back and remove the battery. Look on the label. Unless the person who sold you the phone physically changed the label, or removed it, it will accurately tell you the hardware version of your phone.
Given that the boot loader and modem (baseband) are for the AT&T version, SGH-I337, it seems likely that the hardware is I337.
Edit: Also, check that it's not a cheap fake clone. There are apps that can check hardware, and run benchmarks, etc. Search "Genuine Galaxy" on the play store.
Click to expand...
Click to collapse
On back its printed gt i9505...and I installed genuine galaxy it also says its genunine and model gt i9505......but why baseband is different :/ ?

I think my baseband is of different phone but hows that possible...
why someone would change it...

ahsandon007 said:
I think my baseband is of different phone but hows that possible...
why someone would change it...
Click to expand...
Click to collapse
I've really no clue. I'm not aware whether an AT&T modem will even work on that phone.
If the hardware is genuine GT-I9505, then you will most likely get a more definitive answer in the XDA-Developers forum for that phone.

ahsandon007 said:
What model (version) of s4 is exactly this phone? which software is installed on it? is it stock or not ? plzz help and tell me its complete version details
Click to expand...
Click to collapse
It's most likely an I337 with an I9505 system. Either way, since the bootloader is i337, that means it's locked so if it ever was an I9505 it's not now, but mist likely it wasn't ever.

I checked indownload mode its sgh i337....can I install back stock firmware ...see this site http://www.att.com/esupport/softwareUpdateArticle.jsp?sid=KB419415&cv=820
is it possible to flash through odin this stock lollipop firmware?

Finally I got it....its i337...I checked imei on imei.info it says it is i337 and also checked for blacklist its all clean....and I opened back cover and see it and its written "MADE BY SAMAUNG" ...spelling of samsung is wrong ...it means sticker and software are of 9505 and hardware are i337 at & t usa carrier....I think its changed in korea...phone is converted....now planning to download stock firmware of i337 lollipop and install through odin...
if anyone have link plz share

ahsandon007 said:
Finally I got it....its i337...I checked imei on imei.info it says it is i337 and also checked for blacklist its all clean....and I opened back cover and see it and its written "MADE BY SAMAUNG" ...spelling of samsung is wrong ...it means sticker and software are of 9505 and hardware are i337 at & t usa carrier....I think its changed in korea...phone is converted....now planning to download stock firmware of i337 lollipop and install through odin...
if anyone have link plz share
Click to expand...
Click to collapse
The boot loader is locked, so you can't do this exactly. You can install stock KitKat, install safestrap, and upgrade to lollipop that way. You need to read through the forums to understand what you are doing before you proceed. I'd suggest you do quite a bit of reading, and only flash when you are sure you know what you want to do.

creepyncrawly said:
The boot loader is locked, so you can't do this exactly. You can install stock KitKat, install safestrap, and upgrade to lollipop that way. You need to read through the forums to understand what you are doing before you proceed. I'd suggest you do quite a bit of reading, and only flash when you are sure you know what you want to do.
Click to expand...
Click to collapse
Send me links of threads from which I can understand and also which kitkat version should I install ...if u explain me in detail it will be helpful ..plz

ahsandon007 said:
Send me links of threads from which I can understand and also which kitkat version should I install ...if u explain me in detail it will be helpful ..plz
Click to expand...
Click to collapse
You seem to understand what you are doing. You should be able to figure this out on your own.
Start here.
Also this.
And this.
Or try some of the fine custom firmware in the Android Development forum.

ahsandon007 said:
(in a private message) Hey...there are so many things I cant understand in threads...can you plz tell me step by step how I can update to stock lollipop my sgh i337 ...safestrap etc..stuff ..thnx in advance
Click to expand...
Click to collapse
I do not own this phone, so I can't test or speak from personal experience. I already gave you the links to the information you need ^^^. I don't know if you can receive Over The Air (OTA) firmware updates. You may not be able to if you're not in USA. Also, I'm not sure if you need to be on an AT&T sim. If you can, you can get stock lollipop without root with this method: go to the "[GUIDE]Odin to Stock, Updating, Rooting, and Installing Safestrap" which is the second link. Go to the second post titled "Odin to Stock, Updating, Rooting, and Safestrap Instructions" and click the button to expand the instructions for "OPTION 1 - Stock Lollipop (No ROOT)"
If you cannot receive OTA updates, then currently your option would be to first flash NB1, manually flash the NJ4 update, root and install safestrap. In the Odin to Stock guide, perform both step 1 and step 2 under "NJ4 -- KitKat 4.4.4" After this, you can use the "[How-To] Update to I337_OC3 - 5.0.1 and KeepRoot (4/7/2015) " thread, which is the third link above ^^^.
Your third option would be to wait until the developers post a method for flashing Lollipop directly from Odin.

creepyncrawly said:
I do not own this phone, so I can't test or speak from personal experience. I already gave you the links to the information you need ^^^. I don't know if you can receive Over The Air (OTA) firmware updates. You may not be able to if you're not in USA. Also, I'm not sure if you need to be on an AT&T sim. If you can, you can get stock lollipop without root with this method: go to the "[GUIDE]Odin to Stock, Updating, Rooting, and Installing Safestrap" which is the second link. Go to the second post titled "Odin to Stock, Updating, Rooting, and Safestrap Instructions" and click the button to expand the instructions for "OPTION 1 - Stock Lollipop (No ROOT)"
If you cannot receive OTA updates, then currently your option would be to first flash NB1, manually flash the NJ4 update, root and install safestrap. In the Odin to Stock guide, perform both step 1 and step 2 under "NJ4 -- KitKat 4.4.4" After this, you can use the "[How-To] Update to I337_OC3 - 5.0.1 and KeepRoot (4/7/2015) " thread, which is the third link above ^^^.
Your third option would be to wait until the developers post a method for flashing Lollipop directly from Odin.
Click to expand...
Click to collapse
I successfuly updated to 4.4.2 stock NB1 software manually thorough odin then manually flashed NJ4 by stock recovery...now im not receiving ota update to lolipop....now what nxt to do ? should i root NJ4 and install OC3...
And actually I dont want to root i nedd unrooted stock OC3 ...if you know any direct method to flash..

After update to nj4 4.4.4 im getting delays in sending text msgs and making calls....what to do now should i flash different modem or baseband any ideas ?? :/

Now that you have updated your user account, we can see that you are in Faisalabad, Pakistan using Mobilink carrier. As far as I know, you will not be able to receive an over the air update, nor be able to use Kies to update. Someone who knows more could give a definitive answer on this.
Assuming that you will be unable to use OTA or Kies, your options are:
- root, install safestrap, install rooted OC3
- wait unitl (and if) developers post an Odin flashable version of stock unrooted OC3.
As far as your other issues, you could install the NB1 modem (baseband) and see if that clears up the issues, as it was working before.

creepyncrawly said:
Now that you have updated your user account, we can see that you are in Faisalabad, Pakistan using Mobilink carrier. As far as I know, you will not be able to receive an over the air update, nor be able to use Kies to update. Someone who knows more could give a definitive answer on this.
Assuming that you will be unable to use OTA or Kies, your options are:
- root, install safestrap, install rooted OC3
- wait unitl (and if) developers post an Odin flashable version of stock unrooted OC3.
As far as your other issues, you could install the NB1 modem (baseband) and see if that clears up the issues, as it was working before.
Click to expand...
Click to collapse
I downgraded modem to NB1 and no signal then i used OC3 modem it works bit better than previous one.....lags sometimes ...is there any way to flash 9505 modem to i337 phone ? :/

I upgraded to 5.0.1 using keeproot method of flashfire...thanks broo very very much.....
baseband problem still exists on OC3 modem....i maximum get 3/5 signal bars....can i flash i9505 modem using mobile odin or ant method ?
EDIT: i flashed successfuly 9505 modem but baseband version goes unknown and no sim/signal....is there any fix? Flashing efs?
What if I dwld 9505 lolipop from sammobile and install by odin or flashfire?