Database Users

[Q]help updating sph-L720

Hello,
after a few days researching and trying to root/flash my samsung sph l720 i didnt found anything but first:
a cousin brought me his gs4 l720 from us, it was unlocked and i can "use" it but i cant enable the hotspot etc...
i was almost going to root it but i started reading about knox, bootloaders etc thats why i wanna ask if its possible to update it from 4.3 to 4.4 and enable the hotspot etc.
software version:
L720VPUAMDC
Hardware version
L720.08
Android Version:
4.3
baseband version:
L720VPUAMDC
kernel version:
3.4.0-1927016
[email protected] #1
Sat Nov 16 11:05:09 KST 2013
Compilation number:
JSS15J.L720VPUEMK2
thats all the info in about device... i wanna know if its possible to root it and install a custom recovery like CWM
also if its possible to update it to KitKat
what happend if the Knox flag triggers ? do my s4 bricks or something ? or it just voids the warranty, because i dont care about the warranty as im in another country.

Just to answer your knox question. All it does is void warranty. You can still unlock root and flash Roms with Knox tripped.
Sent from my SPH-L720 using Tapatalk

daniel4653 said:
Just to answer your knox question. All it does is void warranty. You can still unlock root and flash Roms with Knox tripped.
Sent from my SPH-L720 using Tapatalk
Click to expand...
Click to collapse
Thanks, now the only thing i wanna know before i root it is how do i check if the bootloader is locked ?
i read in the cf auto root web that if the phone has a locked bootloader it can brick the phone.

grdenrique said:
Thanks, now the only thing i wanna know before i root it is how do i check if the bootloader is locked ?
i read in the cf auto root web that if the phone has a locked bootloader it can brick the phone.
Click to expand...
Click to collapse
Do some more reading ALL over the forums here. So far our device doesn't have completely locked bootloader. just the knox flag.
It's actually very hard to truly brick this device. You may softbrick but that's easily recoverable.
There are posts on how to update to MF9, MK2 or NAE.
You can root any of those with the latest CF-Autoroot and add a custom recovery and flash a way compatible ROMs as per the OPs directions.
BUT PLEASE take some time to read, search and read some more. If you do you will surely get the most of your time and more importantly your device.
Good luck.

Looks to me like your phone is already rooted. Or at the least has been seriously messed with. You have 3 mismatches in the info you posted. MDC baseband with 4.3, then complilation of MK2. These are all different versions. You need to figure out the exact configuration of your phone before we can proceed with helping you.

cruise350 said:
Looks to me like your phone is already rooted. Or at the least has been seriously messed with. You have 3 mismatches in the info you posted. MDC baseband with 4.3, then complilation of MK2. These are all different versions. You need to figure out the exact configuration of your phone before we can proceed with helping you.
Click to expand...
Click to collapse
i copy it exactly from the cellphone, its there any way that info could be wrong ?

Since it appears your phone may have been upgraded to MK2 at one point, you could try just downloading the full NAE (KIT KAT) tar file from here: http://forum.xda-developers.com/showthread.php?t=2663619 and upgrading to NAE in one quick swoop. Then if you want to root it, you can use cf autoroot and go from there. If your phone has already been unlocked it should maintain the unlock even with the flashing of the stock tar.

cruise350 said:
Since it appears your phone may have been upgraded to MK2 at one point, you could try just downloading the full NAE (KIT KAT) tar file from here: http://forum.xda-developers.com/showthread.php?t=2663619 and upgrading to NAE in one quick swoop. Then if you want to root it, you can use cf autoroot and go from there. If your phone has already been unlocked it should maintain the unlock even with the flashing of the stock tar.
Click to expand...
Click to collapse
Thank you very much for your response. Well, I'll tell you what happened: To sim-unlock that phone it was downgraded to MDC while using MK2 stock rom. My wife's L720 is in the same case and also a co-worker is in the same situation. So now my question is, is there any problem upgrading it to kitkat (NAE) knowing that my wife doesn't uses the rooted rom?

walalm said:
Thank you very much for your response. Well, I'll tell you what happened: To sim-unlock that phone it was downgraded to MDC while using MK2 stock rom. My wife's L720 is in the same case and also a co-worker is in the same situation. So now my question is, is there any problem upgrading it to kitkat (NAE) knowing that my wife doesn't uses the rooted rom?
Click to expand...
Click to collapse
No problem at all, just use the link I referenced earlier and flash using Odin. This will upgrade your phone to kit kat and you won't loose and data.

cruise350 said:
No problem at all, just use the link I referenced earlier and flash using Odin. This will upgrade your phone to kit kat and you won't loose and data.
Click to expand...
Click to collapse
Confirmed, flashed my co-worker's phone and everything is working fine (I was unlocked using that downgrade) and remain unlocked.
Thank you very much, the next step is flash my wife's one.

Is there any way to downgrade from official 4.4.2 to older version?

so i tried it and now i have soft bricked s4 . now i'm downloading 4.4.2 firmware to back it to live
I can't find any solution for downgrade , so it's not possible?
i want to unlock it , that's why i need older version of firmware ...
or will this work on 4.4.2?
http://forum.xda-developers.com/showthread.php?t=2415587

You can only download by custom Roms but not by official tar. Once on 4.4.2 you cannot go back via tar. And search that thread. Your question about unlocking on 4.4.2 has already been answered.
Sent from my SPH-L720 using Tapatalk

daniel4653 said:
You can only download by custom Roms but not by official tar. Once on 4.4.2 you cannot go back via tar. And search that thread. Your question about unlocking on 4.4.2 has already been answered.
Sent from my SPH-L720 using Tapatalk
Click to expand...
Click to collapse
Can you post that thread here?
Can't find it myself
i need unlock for international carriers

worked that tread (which i posted in first post) to unlock s4 on 4.4.2(nae)
but i have low signal , is anything there that i can do about it?

[Request] Update from NB1 to NC1

currently I am outside us i want NC1 Frimware to upgrade with out rooting my device
ٍSorry i but it on wrong place i want to move it to question sections i am sorry for that

The NC1 update is provided by your carrier. You should just be able to do a check for updates on your device and it'll find it. Please know that it's a very recent update and not much is known about how it affects custom ROMs or the rooting process. I updated to it and I'm waiting to see what the experts here say.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app

5erv0 said:
The NC1 update is provided by your carrier. You should just be able to do a check for updates on your device and it'll find it. Please know that it's a very recent update and not much is known about how it affects custom ROMs or the rooting process. I updated to it and I'm waiting to see what the experts here say.
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
Click to expand...
Click to collapse
My carrier is At&t and they don't allow any update out the US

There was another thread I posted this to but for some reason the OP wanted the thread deleted.
So here is the link to the file I was pushed.
https://mega.co.nz/#!oYp13KoL!iM-Wr_M4ix22OeLw6cne0G1WXH7BjuN9i0Fr995G6lQ
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app

0o0nano0o0 said:
My carrier is At&t and they don't allow any update out the US
Click to expand...
Click to collapse
Currently living in Japan and my i337 took the 4.3 and 4.4 updates just fine prior to rooting.
Sent from my SGH-I337 using XDA Premium 4 mobile app

0o0nano0o0 said:
currently I am outside us i want NC1 Frimware to upgrade with out rooting my device
ٍSorry i but it on wrong place i want to move it to question sections i am sorry for that
Click to expand...
Click to collapse
I honestly do not trust the update and I will explain. I believe the update was pushed to prevent us, the custom ROM users, from downgrading back to mf3. We all know that in mf3 there is an exploit where we can change the kernel inside the memory or something like that. I am rooted on nb1 and am running a bootloader that lets me downgrade back to mf3. It would make sense to me that they are trying to prevent that exploit. I know they probably fix a stability issue or something but I would not flash to nc1 if you don't want custom roms here in the near future.

braindead444 said:
I honestly do not trust the update and I will explain. I believe the update was pushed to prevent us, the custom ROM users, from downgrading back to mf3. We all know that in mf3 there is an exploit where we can change the kernel inside the memory or something like that. I am rooted on nb1 and am running a bootloader that lets me downgrade back to mf3. It would make sense to me that they are trying to prevent that exploit. I know they probably fix a stability issue or something but I would not flash to nc1 if you don't want custom roms here in the near future.
Click to expand...
Click to collapse
We could never downgrade to mf3, only a partial downgrade to MK2 from nb1. And jeboo already said the nc1 bootloader does not increment the q fuse counter so you can still go back to nb1 if you want...

braindead444 said:
I honestly do not trust the update and I will explain. I believe the update was pushed to prevent us, the custom ROM users, from downgrading back to mf3. We all know that in mf3 there is an exploit where we can change the kernel inside the memory or something like that. I am rooted on nb1 and am running a bootloader that lets me downgrade back to mf3. It would make sense to me that they are trying to prevent that exploit. I know they probably fix a stability issue or something but I would not flash to nc1 if you don't want custom roms here in the near future.
Click to expand...
Click to collapse
dmc2359 said:
We could never downgrade to mf3, only a partial downgrade to MK2 from nb1. And jeboo already said the nc1 bootloader does not increment the q fuse counter so you can still go back to nb1 if you want...
Click to expand...
Click to collapse
On top of that, the exploit is at the kernel level. We can still get the MK2 kernel so we can still get the exploit. That's why bypasslkm still works on the downgrade.
Sent from my SGH-I337 running Blackbox 3.0

I was Odining back to stock MK2 and after it was finished I set it up then went outside real quick. Came back and phone said it was updated to this NC1 firmware and this happens when looks like potential progress on the "serious about unlocking bootloader" thread f u ATT.
Sent from my SAMSUNG-SGH-I337 using XDA Free mobile app

Thread moved :good:

raulz28 said:
I was Odining back to stock MK2 and after it was finished I set it up then went outside real quick. Came back and phone said it was updated to this NC1 firmware and this happens when looks like potential progress on the "serious about unlocking bootloader" thread f u ATT.
Sent from my SAMSUNG-SGH-I337 using XDA Free mobile app
Click to expand...
Click to collapse
Don't worry, chances are exploits will function still if one is found, and if Hashcode implements kexec you'll still be fine.

0o0nano0o0 said:
My carrier is At&t and they don't allow any update out the US
Click to expand...
Click to collapse
I think you should be able to connect through a proxy and download the update over wifi that way. Note that the update will only work over WiFi... not mobile data. I hope you get it worked out.

CAG-man said:
There was another thread I posted this to but for some reason the OP wanted the thread deleted.
So here is the link to the file I was pushed.
https://mega.co.nz/#!oYp13KoL!iM-Wr_M4ix22OeLw6cne0G1WXH7BjuN9i0Fr995G6lQ
Sent from my SAMSUNG-SGH-I337 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Sir,
Download the OTA package I337UCUFNC1 19MB Zip File
This Link Not Working : https://mega.co.nz/#!oYp13KoL!iM-Wr_M4ix22OeLw6cne0G1WXH7BjuN9i0Fr995G6lQ
Unavailable To Download
Plz Give Fresh Link :
Plz Upload Official NC1 Update 19MB ... I Can't Download Plz Upload Another Link I Need Sir
Plz Help Me :crying:

Am I able to downgrade from NI1 to NB1?

I was just wondering if I could downgrade the firmware safely because I want to Sim unlock my at&t s4 so I could use it with my T-Mobile Sim card.. ?

You can safely downgrade. To Sim unlock, you don't need to downgrade.

Yes you are able to. Have done it.many times, just download the NB1 firmware and flash via Odin. Hope it helps.
Sent from my SGH-I337 using XDA Free mobile app

jmjoyas said:
You can safely downgrade. To Sim unlock, you don't need to downgrade.
Click to expand...
Click to collapse
I'm in need of help figuring this one out @jmjoyas , but I will continue my efforts and will her back as soon as I try sin unlocking. If you have a method that helped helped for you, I would love to know
thebestiam said:
Yes you are able to. Have done it.many times, just download the NB1 firmware and flash via Odin. Hope it helps.
Click to expand...
Click to collapse
Yes that answers part of my question. I was wondering this because I saw a method to sim unlock that required being on the NB1 firmware, but I might be wrong if I'm able to do it on this NI1 firmware hehehe
Sent from my SGH-I337 using XDA Free mobile app[/QUOTE]

dinodustin said:
I'm in need of help figuring this one out @jmjoyas , but I will continue my efforts and will her back as soon as I try sin unlocking. If you have a method that helped helped for you, I would love to know
Yes that answers part of my question. I was wondering this because I saw a method to sim unlock that required being on the NB1 firmware, but I might be wrong if I'm able to do it on this NI1 firmware hehehe
Sent from my SGH-I337 using XDA Free mobile app
Click to expand...
Click to collapse
[/QUOTE]
All required info in All Things AT&T
Steps:
1. Root (read root section of the thread)
2. Install safestrap v3.72 and install recovery using the app. You may have to use selinuxmodechanger app to set selinux to permissive if the recovery installation doesnt work
Reboot the phone and safestrap recovery can be accessed from the splash screen that will be shown during boot.
3. Flash the MF3 modem from safestrap recovery (link to modems available in the ATT thread)
4. Reboot the phone and run regionlockaway app. This should successfully sim unlock the phone for you.
5. You can flash back the NI1 modem in safestrap recovery.

Will be doing this now. Will let you know when I get working

[Q] GALAXY S4 ATnT 5.0.1 OFFICIAL NEED HELP HERE!

My playstore not working said. " cant initialize...."
I know the cause of this is the freedom. I used freedom when im in kitkat official. Im also rooted that time. Then i forgot to delete the "host" file before updating. Now my "at&t galaxy s4 is 5.0
1 official" can someone help me root this device pls. To fix this problem ? Or any fix/method to this problem without root ?
I also dont know what is lock and unlock bootloader, even how to check if i have lock or unlock bootloader. What does it mean if i have lock and unlock bootloader
Note: my galaxy s4 is at&t 5.0.1 not rooted.
My galaxy s4 at&t can read any sim card because its already factory unlocked.

First, freedom is warez. DO NOT USE IT. To get you're phone working properly again you'll most likely need to flash the nb1 firmware in Odin. You can then work on rooting your device and getting back to 5.x. But you'll have to read this very carefully first, http://forum.xda-developers.com/showthread.php?p=53758227
Sent from my Nexus 9 using XDA Free mobile app

My s4 att is already in 5.0.1 can i still use that ?
Can u teach me how?
How can i downgrade from 5.0.1 to kitkat again if thats posible.
Or how can i root this 5.0.1 if thats possible.
Someone said att has lock bootloader , i really dont know whats that.
Sent from my GT-N7100

dxtrr2894 said:
My s4 att is already in 5.0.1 can i still use that ?
Can u teach me how?
How can i downgrade from 5.0.1 to kitkat again if thats posible.
Or how can i root this 5.0.1 if thats possible.
Someone said att has lock bootloader , i really dont know whats that.
Sent from my GT-N7100
Click to expand...
Click to collapse
All at&t i337's have a locked bootloader. So don't worry about that. Carefully read the link I gave you. Yes it's long and yes it's going to take a lot of reading and re-reading before it makes sense. And yes you can downgrade to kitkat, nb1, and yes you can have root on 5.0. Look at how to flash nb1 in Odin, how to update to nc1 and root, and how to keep root to oc3, 5.0.
Sent from my Nexus 9 using XDA Free mobile app

Sir. My s4 is 5.0.1 not 5.0 can i still do what u are saying ?
Sent from my GT-N7100 using XDA Free mobile app

dxtrr2894 said:
Sir. My s4 is 5.0.1 not 5.0 can i still do what u are saying ?
Sent from my GT-N7100 using XDA Free mobile app
Click to expand...
Click to collapse
Yes, I was lazy and didn't want to type 5.0.1.

Pls help me step by step ?
What should i do 1st. Dont worry i know how to flash thru odin . I just dont know how to downgrade and whats is nb1 etc. Also what is tools and method
What method or tools to downgrade my att s4 5.0.1 to kitkat ??
Sent from my GT-N7100 using XDA Free mobile app

What should i do 1st in my galaxy s4 5.0.1?
Should i Flash nb1 thru odin 1st ?
Or downgrade to kitkat 1st ? (Im sorry bro. In your link i cant see any method to downgrade) pls teach me how. Thanks and Godbless
Sent from my GT-N7100 using XDA Free mobile app

dxtrr2894 said:
Pls help me step by step ?
What should i do 1st. Dont worry i know how to flash thru odin . I just dont know how to downgrade and whats is nb1 etc. Also what is tools and method
What method or tools to downgrade my att s4 5.0.1 to kitkat ??
Sent from my GT-N7100 using XDA Free mobile app
Click to expand...
Click to collapse
dxtrr2894 said:
What should i do 1st in my galaxy s4 5.0.1?
Should i Flash nb1 thru odin 1st ?
Or downgrade to kitkat 1st ? (Im sorry bro. In your link i cant see any method to downgrade) pls teach me how. Thanks and Godbless
Sent from my GT-N7100 using XDA Free mobile app
Click to expand...
Click to collapse
The people who contribute here donate their time to the forums. Usually, they do it because they like to help others. For many it is like a hobby.
However, there is already a lot of information collected here on the forums. Most people don't really enjoy saying the same things over and over. And besides, it is not really very polite to ask someone hold your hand, when you can find the information and process it yourself.
Most people here would say, if you can't understand the directions, then you shouldn't probably be trying to modify your phone. So, to re-iterate what jd said, read the instructions, read them again, and again if necessary. Only proceed when you understand what you are doing. If something doesn't make sense to you, ask a specific question and someone will be happy to explain.
What should I do first?
Click to expand...
Click to collapse
You should flash nb1 using desktop Odin. This will return your phone to fully stock I337UCUFNB1 which is KitKat 4.4.2.
You may also want to read through this thread several times.

Is the nb1 is universal ? I mean, how can i know if this fits in my device ? I337 att
Can i use any versio of odin ? Or the latest ?
Thanks alot. Ill try tomorrow. Its 1am here thanks bro. But just for now ill look for nb1 download link
Sent from my GT-N7100 using XDA Free mobile app

dxtrr2894 said:
Is the nb1 is universal? I mean, how can i know if this fits in my device ? I337 att
Click to expand...
Click to collapse
nb1 is shorthand notation for I337UCUFNB1, as I said in my previous post. The first part (I337) tells you that it is for your phone.
Can i use any version of odin? Or the latest?
Click to expand...
Click to collapse
Any version of Odin should work okay. Odin3 v3.09 is usually used with the S4.
Thanks alot. Ill try tomorrow. Its 1am here thanks bro. But just for now ill look for nb1 download link
Click to expand...
Click to collapse
Follow the link in my previous post, which leads to the thread "[GUIDE]Odin to Stock, Updating, Rooting, and Installing Safestrap." In that thread, you will find links to all the downloads you need.
Again, read until you understand.

AFTER THE NB1 WHATS NEXT ? i downloaded the nb1 rootable. Later ill flash it thru odin.
Thankks in advance
Sent from my GT-N7100 using XDA Free mobile app

If you want rooted Lollipop, see this thread.
Please follow my advice, and read until you understand.

I flash the nb1 im from 5.0.1 att s4.
I got fail for just a sec.
I try different cables . And different port
Still i always got failed
NOTE : FOR JUST ONLY A SEC.
The nb1 i downloaded is the one rootable. With towel root.
What do you think is the problem here ?
Sent from my GT-N7100 using XDA Free mobile app

Odin NB1 from here http://forum.xda-developers.com/showthread.php?t=2674223
Sent from my i337 on dark carnage rom

Cant find the download link. Pls give me.? Maybe its been flooded by many reply
Sent from my GT-N7100 using XDA Free mobile app