[rominfo]
LEAKED FIRMWARE INFO
| Firmware Version | I337UCUFNB1 |
| Android Version | Android 4.4.2 KitKat |
| Is this Official? | YES! This is an OTA update. |
| Stability | Full stability. |
| Credits | Maribou & jeboo |
[/rominfo]
Known Bugs/Issues
- None so far
WARNING!
This update contains a new bootloader due to which downgrading to previous stock firmwares WILL NOT BE POSSIBLE.
As of yet, root CAN NOT be retained or acquired on this build (I337UCUFNB1).
Warranty may be void of your device if you follow the procedures given on this page.
You only are responsible for your device. We won’t be liable if any damage occurs to your device and/or its components.
AT&T GALAXY S4 SGH-I337 ANDROID 4.4.2 KITKAT OTA UPDATE
Before you begin with the instructions below, make sure your android device is adequately charged — at least 50% battery of the device.
STEP 0: CHECK DEVICE MODEL NO.
To make sure your device is eligible with this, you must first confirm its model no. in ‘About device’ option under Settings. Another way to confirm model no. is by looking for it on the packaging box of your device. It must be SGH-I337!
Do not use the procedures discussed here on any other Galaxy S4 (including the Galaxy S4 variant at Sprint, Verizon, US Cellular, T-Mobile and other International variants) or any other device of Samsung or any other company. You have been warned!
STEP 1: BACKUP YOUR DEVICE
Back up important data and stuff before you start playing around here as there are chances you might lose your apps and app-data (app settings, game progress, etc.), and in rare case, files on the internal memory, too.
For help on Backup and Restore, check out our exclusive page on that linked right below.
► ANDROID BACK UP AND RESTORE GUIDE: APPS AND TIPS
STEP 2: YOU MUST HAVE STOCK FIRMWARE INSTALLED
It’s required that you are unrooted, and don’t have a custom recovery (CWM or TWRP) installed. Plus, no custom firmwares, either.
So, it’s mandatory that you first go back to stock to Android 4.3 build on your AT&T Galaxy S4, using the firmware MK2.
Follow the link below to Update or Install Plain Android 4.3 build from Samsung, which is neither rooted nor has a CWM/TWRP recovery installed.
Then try the guide below, and using the stock recovery, you shall be able to update to latest Android 4.4 KitKat Update for your AT&T Galaxy S4 without any trouble.
INSTALL ANDROID 4.3 MK2 FIRMWARE
STEP 3: INSTALLATION INSTRUCTIONS
DOWNLOADS
Download the firmware file given below.
OTA FILE
DOWNLOAD LINK [MIRROR] | File name: 2400258.cfg (417.66 MB)
STEP-BY-STEP GUIDE
Important Note: Backup important files stored on internal SD card of your device, so that in case a situation arises requiring you to do a factory reset after flashing the leaked firmware, which might delete internal sd card too, your files will remain safe on PC.
- Make sure you are running Android 4.3 MK2 firmware for your AT&T Galaxy S4. And that it’s not rooted, and has stock recovery installed, not CWM/TWRP recovery. If not, follow the link in Step 2 above to installed the MK2 firmware first.
└ If your AT&T Galaxy S4 is running MK2 firmware, then you won’t be able to update to Android 4.4 using this guide. - Rename the OTA file that you downloaded from the link above to change its extension to .zip. The new file name should then be 2400258.zip
- Transfer the 2400258.zip file to root of your phone’s internal or external SD card
└ Note that you must put the 2400258.zip file in the root directory of either storage. Don’t put the file inside any folder on your card. - Boot into Recovery mode:
- Power off your phone and wait for few seconds until it’s completely powered off.
- Hold down the following three buttons together ‘Home + Power + Volume UP‘ and release them as soon as you see the Samsung Galaxy S4 logo on the device’s screen. This will boot your phone into recovery mode. It must be saying 3e recovery at the top. If not, it’s not stock recovery and you haven’t read the above carefully. Pls do now.
└ Once in recovery, use Volume buttons to navigate between options and Power button to select an option. And if you need further help with booting into recovery mode, check our Galaxy S4 Recovery Mode help page.
- Now select ‘Apply update.zip‘ if you transferred the file to internal SD card OR select ‘Apply update from external storage‘ if you transferred the file to external storage.
- Wait for the device to finish the flashing process. Once it’s done, select Reboot from the main menu in recovery.
That’s it. You’re done.
FEEDBACK US!
It was easy to flash the OTA update of Android 4.4.2 KitKat for AT&T Galaxy S4, right? Let us know in comments below.
214 responses to “Download / Install The AT&T Galaxy S4 SGH-I337 Android 4.4.2 KitKat OTA Update [I337UCUFNB1]”
I’m 71, dumb as a rock, and it took me all of 4 min with the above instructions. I was coming from 4.4.2 mdl unofficial release. As I am typing the Google backups are re-installing my software. Seems like an easy upgrade with this information.
Thanks to you all
[email protected]
Really glad to hear that. Thanks!
RDomke Again:
I was coming from I337ucufmld not mdl. AND the upgrade did not take. I’m rebooting again to see if that will work , if not I will try the install again.
RDomke: Error in zip file (TO FAST FOR ME TO SEE)
Going to ODIN back to mk2 then try again from there.
Yes, that’s right thing to do. Let us know if it didn’t work for you on MK2.
RDomke again: TaaDaa
When I got to mk2, all the google rebuild stuff kicked in. Then when that was finished I went to check for system updates and OTA is 417.66 and 80% done right now.
So it comes down to the zip was a bust (for me), reverting to mk2 pulled it right in.
I do believe the zip error was my 4.4.2 os not a file problem.
UPdate just finished, good luck to you all.
RDomke
Cool. 🙂
hey i tried it but it says E:verification failed and the phone reboots and starts up as if i did a factory reset
Is your phone is running Android 4.3 MK2 build?
Yes, the phone is running Android 4.3 MK2 build but I am getting E:verification failed error.
I’m 71, dumb as a rock, and it took me all of 4 min with the above instructions. I was coming from 4.4.2 mdl unofficial release. As I am typing the Google backups are re-installing my software. Seems like an easy upgrade with this information.
Thanks to you all
[email protected]
Really glad to hear that. Thanks!
hey i tried it but it says E:verification failed and the phone reboots and starts up as if i did a factory reset
Is your phone is running Android 4.3 MK2 build?
Yes, the phone is running Android 4.3 MK2 build but I am getting E:verification failed error.
RDomke Again:
I was coming from I337ucufmld not mdl. AND the upgrade did not take. I’m rebooting again to see if that will work , if not I will try the install again.
RDomke: Error in zip file (TO FAST FOR ME TO SEE)
Going to ODIN back to mk2 then try again from there.
Yes, that’s right thing to do. Let us know if it didn’t work for you on MK2.
RDomke again: TaaDaa
When I got to mk2, all the google rebuild stuff kicked in. Then when that was finished I went to check for system updates and OTA is 417.66 and 80% done right now.
So it comes down to the zip was a bust (for me), reverting to mk2 pulled it right in.
I do believe the zip error was my 4.4.2 os not a file problem.
UPdate just finished, good luck to you all.
RDomke
Cool. 🙂
I’m 71, dumb as a rock, and it took me all of 4 min with the above instructions. I was coming from 4.4.2 mdl unofficial release. As I am typing the Google backups are re-installing my software. Seems like an easy upgrade with this information.
Thanks to you all
[email protected]
Really glad to hear that. Thanks!
hey i tried it but it says E:verification failed and the phone reboots and starts up as if i did a factory reset
Is your phone is running Android 4.3 MK2 build?
Yes, the phone is running Android 4.3 MK2 build but I am getting E:verification failed error.
RDomke Again:
I was coming from I337ucufmld not mdl. AND the upgrade did not take. I’m rebooting again to see if that will work , if not I will try the install again.
RDomke: Error in zip file (TO FAST FOR ME TO SEE)
Going to ODIN back to mk2 then try again from there.
Yes, that’s right thing to do. Let us know if it didn’t work for you on MK2.
RDomke again: TaaDaa
When I got to mk2, all the google rebuild stuff kicked in. Then when that was finished I went to check for system updates and OTA is 417.66 and 80% done right now.
So it comes down to the zip was a bust (for me), reverting to mk2 pulled it right in.
I do believe the zip error was my 4.4.2 os not a file problem.
UPdate just finished, good luck to you all.
RDomke
Cool. 🙂
please how do i find the root folder? i tried and im lost
The main folder. The storage itself in which all the folder and files are, the outermost, the parent of all folders, etc. etc. whatever you call it is your root folder. Phew! ‘nuf, right?
yeah thats exactly where i put the file but i cant find it, i put it on the external card and i found the file, when i updated it didnt show, it only formatted my phone and made me to resign in with my google accounts,, checked the phone status and its still stuck on 4.2.2
Upgrade to mk2 firmware first and then try it. Link is there in the guide above.
please is there a way i could use odin to do that?
The mk2 is in .tar.md5 file format, and it’s to be flashed with Odin only.
hello sorry to bother you again. i tried to install the mk2 firmware and it bricked my phone, i got this message “system software not authorized by at&t” but i have managed to reboot to the stock android once again and i want to give the kitkat another shot, how do i go about it, i have managed to update my firmware to S4 SGH-I337 UCUAMDL
RDomke again: The update did not erase my SD card. All my contacts came back too. Did have to re-install a couple of WiFi connections from my kids houses. Other then that it all seems ok.
[email protected]
Great!
Hello All,
Guide updated with link to our own guide in step 2 to help you easily install the required Mk2 firmware, based on Android 4.3. Please install MK2 firmware first, linked in step 2, and then follow the guide. (Point 1 of guide also asks you to go to step 2 for installing MK2 first.)
Hope it helps!
RDomke:
Remember, Rename file to a ZIP, Imperative!
please how do i find the root folder? i tried and im lost
The main folder. The storage itself in which all the folder and files are, the outermost, the parent of all folders, etc. etc. whatever you call it is your root folder. Phew! ‘nuf, right?
yeah thats exactly where i put the file but i cant find it, i put it on the external card and i found the file, when i updated it didnt show, it only formatted my phone and made me to resign in with my google accounts,, checked the phone status and its still stuck on 4.2.2
Upgrade to mk2 firmware first and then try it. Link is there in the guide above.
please is there a way i could use odin to do that?
The mk2 is in .tar.md5 file format, and it’s to be flashed with Odin only.
hello sorry to bother you again. i tried to install the mk2 firmware and it bricked my phone, i got this message “system software not authorized by at&t” but i have managed to reboot to the stock android once again and i want to give the kitkat another shot, how do i go about it, i have managed to update my firmware to S4 SGH-I337 UCUAMDL
please how do i find the root folder? i tried and im lost
The main folder. The storage itself in which all the folder and files are, the outermost, the parent of all folders, etc. etc. whatever you call it is your root folder. Phew! ‘nuf, right?
yeah thats exactly where i put the file but i cant find it, i put it on the external card and i found the file, when i updated it didnt show, it only formatted my phone and made me to resign in with my google accounts,, checked the phone status and its still stuck on 4.2.2
Upgrade to mk2 firmware first and then try it. Link is there in the guide above.
please is there a way i could use odin to do that?
The mk2 is in .tar.md5 file format, and it’s to be flashed with Odin only.
hello sorry to bother you again. i tried to install the mk2 firmware and it bricked my phone, i got this message “system software not authorized by at&t” but i have managed to reboot to the stock android once again and i want to give the kitkat another shot, how do i go about it, i have managed to update my firmware to S4 SGH-I337 UCUAMDL
RDomke again: The update did not erase my SD card. All my contacts came back too. Did have to re-install a couple of WiFi connections from my kids houses. Other then that it all seems ok.
[email protected]
Great!
RDomke again: The update did not erase my SD card. All my contacts came back too. Did have to re-install a couple of WiFi connections from my kids houses. Other then that it all seems ok.
[email protected]
Great!
Hello All,
Guide updated with link to our own guide in step 2 to help you easily install the required Mk2 firmware, based on Android 4.3. Please install MK2 firmware first, linked in step 2, and then follow the guide. (Point 1 of guide also asks you to go to step 2 for installing MK2 first.)
Hope it helps!
RDomke:
Remember, Rename file to a ZIP, Imperative!
Hello All,
Guide updated with link to our own guide in step 2 to help you easily install the required Mk2 firmware, based on Android 4.3. Please install MK2 firmware first, linked in step 2, and then follow the guide. (Point 1 of guide also asks you to go to step 2 for installing MK2 first.)
Hope it helps!
RDomke:
Remember, Rename file to a ZIP, Imperative!
I have i337ucuemk2 firmware. Been rooted and wanted to go back stock. This firmware is i337vcuemk2. Can this cause problems?
Try without installing the vcuemk2. If it fails, then install the vcuemk2 and try then. Make necessary backups.
Same here…
iam on virgin i337m Canadian network.. will this work?
Not sure. Don’t try.
Thanks, i already tried. Not working buddy!!!
I have i337ucuemk2 firmware. Been rooted and wanted to go back stock. This firmware is i337vcuemk2. Can this cause problems?
Try without installing the vcuemk2. If it fails, then install the vcuemk2 and try then. Make necessary backups.
Same here…
I have i337ucuemk2 firmware. Been rooted and wanted to go back stock. This firmware is i337vcuemk2. Can this cause problems?
Try without installing the vcuemk2. If it fails, then install the vcuemk2 and try then. Make necessary backups.
Same here…
iam on virgin i337m Canadian network.. will this work?
Not sure. Don’t try.
Thanks, i already tried. Not working buddy!!!
iam on virgin i337m Canadian network.. will this work?
Not sure. Don’t try.
Thanks, i already tried. Not working buddy!!!
Hey, every time I try to install this it says verification failed. I’ve tried numerous times. I’m running 4.3 mk2. I used Odin to install this firmware. The phone has no recoveries and is not rooted. i tried doing it through AT&T software upgrade but all it said was that the software update was interrupted? Is there anyway I can install this through Odin?
Followed step by step and get the Kit Kat stable and fine.
Now waiting for rooting to get the options to install languages not listed on AT&T version.
I cant figure it out why AT&T do not include others languages, like portuguese, in this awsome device.
Great job.
Thanks.
Hey, every time I try to install this it says verification failed. I’ve tried numerous times. I’m running 4.3 mk2. I used Odin to install this firmware. The phone has no recoveries and is not rooted. i tried doing it through AT&T software upgrade but all it said was that the software update was interrupted? Is there anyway I can install this through Odin?
Hey, every time I try to install this it says verification failed. I’ve tried numerous times. I’m running 4.3 mk2. I used Odin to install this firmware. The phone has no recoveries and is not rooted. i tried doing it through AT&T software upgrade but all it said was that the software update was interrupted? Is there anyway I can install this through Odin?
Followed step by step and get the Kit Kat stable and fine.
Now waiting for rooting to get the options to install languages not listed on AT&T version.
I cant figure it out why AT&T do not include others languages, like portuguese, in this awsome device.
Great job.
Thanks.
Followed step by step and get the Kit Kat stable and fine.
Now waiting for rooting to get the options to install languages not listed on AT&T version.
I cant figure it out why AT&T do not include others languages, like portuguese, in this awsome device.
Great job.
Thanks.
Im new to all this. My question is that I have 4.2.2 firmware factory from at&t. Can I just install this update or do I need to do the 4.3 first?
Install Android 4.3 first using the link for MK2 firmware in step 2.
Hi, Is it not at all possible to update 4.2.2 directly to 4.4.2 ??…
Hi, Is it not possible to upgrade it firectly to 4.4.2
Im new to all this. My question is that I have 4.2.2 firmware factory from at&t. Can I just install this update or do I need to do the 4.3 first?
Install Android 4.3 first using the link for MK2 firmware in step 2.
Hi, Is it not at all possible to update 4.2.2 directly to 4.4.2 ??…
Hi, Is it not possible to upgrade it firectly to 4.4.2
Im new to all this. My question is that I have 4.2.2 firmware factory from at&t. Can I just install this update or do I need to do the 4.3 first?
Install Android 4.3 first using the link for MK2 firmware in step 2.
Hi, Is it not at all possible to update 4.2.2 directly to 4.4.2 ??…
Hi, Is it not possible to upgrade it firectly to 4.4.2
i can’t find the line : apply update.zip
i can’t find the line : apply update.zip
i can’t find the line : apply update.zip
Follwed step by step all it did was reset my device and keep me on 4.3 and when I rebooted it it was rooted.
Follwed step by step all it did was reset my device and keep me on 4.3 and when I rebooted it it was rooted.
Follwed step by step all it did was reset my device and keep me on 4.3 and when I rebooted it it was rooted.
My phone is running Android 4.3 MK2 build and I am getting E:verification failed error and this only formats and reboots my phone!!! :S Can you help ??
is it rooted when it formats and boots up?
Dude..It works perfectly which was mentioned in above step… only you need to download latest software from above link.. that’s it.. you will be running on 4.4.2 .
Only genius can suggest above step.. hats of to you boss…!!!
My phone is running Android 4.3 MK2 build and I am getting E:verification failed error and this only formats and reboots my phone!!! :S Can you help ??
is it rooted when it formats and boots up?
Dude..It works perfectly which was mentioned in above step… only you need to download latest software from above link.. that’s it.. you will be running on 4.4.2 .
Only genius can suggest above step.. hats of to you boss…!!!
My phone is running Android 4.3 MK2 build and I am getting E:verification failed error and this only formats and reboots my phone!!! :S Can you help ??
is it rooted when it formats and boots up?
Dude..It works perfectly which was mentioned in above step… only you need to download latest software from above link.. that’s it.. you will be running on 4.4.2 .
Only genius can suggest above step.. hats of to you boss…!!!
I cant install the update it says error/sideload/zip
I cant install the update it says error/sideload/zip
I cant install the update it says error/sideload/zip
THIS WORK PERFECT! i was on 4.2.2 S4 SGH-I337 and i am fully running 4.4.2 now! i will tell everybody here who is having issues, READ CAREFULLY!! the instructions are give to you for a reason
THIS WORK PERFECT! i was on 4.2.2 S4 SGH-I337 and i am fully running 4.4.2 now! i will tell everybody here who is having issues, READ CAREFULLY!! the instructions are give to you for a reason
THIS WORK PERFECT! i was on 4.2.2 S4 SGH-I337 and i am fully running 4.4.2 now! i will tell everybody here who is having issues, READ CAREFULLY!! the instructions are give to you for a reason
work perfectlyy 😀 thanksss, follow all steps, first install the mk2 firmware and after install kit kat, rename the file .cfg to .zip, thanks 😀
u find knox ? in update?
work perfectlyy 😀 thanksss, follow all steps, first install the mk2 firmware and after install kit kat, rename the file .cfg to .zip, thanks 😀
u find knox ? in update?
work perfectlyy 😀 thanksss, follow all steps, first install the mk2 firmware and after install kit kat, rename the file .cfg to .zip, thanks 😀
u find knox ? in update?
I used to be 4.2.2 and managed to upgrade to 4.3 following yr tutorial steps, nevertheless when I tried updating to 4.4 I placed the .zip file to root directory and once in recovery mode it didn’t show up “apply update.zip” but apply update from cache, apply update from ADB, reboot device, and apply update from external card (I don’t have external card btw) WHAT SHOULD I DO?
I used to be 4.2.2 and managed to upgrade to 4.3 following yr tutorial steps, nevertheless when I tried updating to 4.4 I placed the .zip file to root directory and once in recovery mode it didn’t show up “apply update.zip” but apply update from cache, apply update from ADB, reboot device, and apply update from external card (I don’t have external card btw) WHAT SHOULD I DO?
I used to be 4.2.2 and managed to upgrade to 4.3 following yr tutorial steps, nevertheless when I tried updating to 4.4 I placed the .zip file to root directory and once in recovery mode it didn’t show up “apply update.zip” but apply update from cache, apply update from ADB, reboot device, and apply update from external card (I don’t have external card btw) WHAT SHOULD I DO?
can i updatre to stock 4.4 my device is running at&t factory 4.2.2 MF3 firmware please reply
can i updatre to stock 4.4 my device is running at&t factory 4.2.2 MF3 firmware please reply