Lost root - Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot

I lost root and now this is on my screen after flashing a lock screen mod that broke my wifi. Tried my nandroid and it failed and said I lost root. Has anyone aeen this before?
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primo523 said:
I lost root and now this is on my screen after flashing a lock screen mod that broke my wifi. Tried my nandroid and it failed and said I lost root. Has anyone aeen this before?
Sent from my SPH-L720 using xda app-developers app
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That's odd... Which lock screen mod did you try to install? (make sure it's compatible!)
My advice would just be to Odin it. It's really strange that a nandroid backup didn't take care of it
Did you change the kernel at all?

That pop up looks like one of the things you can do on developer options.
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Thanks guys. Just let sprint. They tried fir 2 hours to makes that message dissappear. Flashed new software several times. The tech finally gave up and ordered me a new phone. She said it was hardware related.
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Related

Prevention information and wifi don't work

Sent from my SPH-L720 using xda app-developers appi just got the phone. I have only rooted it, installed titanium backup and restore from my s3. I keep having this prevention information warning come up, and my wifi won't turn on. Any suggestions?
udrunner said:
Sent from my SPH-L720 using xda app-developers appi just got the phone. I have only rooted it, installed titanium backup and restore from my s3. I keep having this prevention information warning come up, and my wifi won't turn on. Any suggestions?
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This has been cleared already and not the place to post this question but anyways. Check your setting about device. Take a screenshot and post it here. It just could be you have two different firmwares on your phone.
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If its what I think. Where it says you have to reboot. You have to go I to system/app with a root browser and delete Knox apk. As far as WiFi try flashing a different kernel.
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MF3 Stock

I rooted MF3 and all I have is root, is there anyway I can return back to stick with complete restore? If not, I can just back everything up. I will do it no matter what. My phone is working just fine, just wanted to go back to stock?
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If you mean unroot, then you unfortunately cannot do that at the moment. There is no MF3 factory image to flash back to, as of now at least.
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What do you mean, back to stock? The way it came out of the box? The way it is now unrooted? Not sure what you want to do. And how are you backing it up?
Apps don't matter to me. I can send all my pictures and text messages etc. To the computer. I mean unroot, sorry. But since there isn't any, I will just have to wait it out. Thanks for the information.
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tmac42 said:
Apps don't matter to me. I can send all my pictures and text messages etc. To the computer. I mean unroot, sorry. But since there isn't any, I will just have to wait it out. Thanks for the information.
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It's probable that you can unroot. Do you have super su? You can do an unroot in settings within it.
Yes, I have super su, is that safe? Then I will do it?
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tmac42 said:
Yes, I have super su, is that safe? Then I will do it?
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I've never tried it with mf3 so I can't answer that. It works on other firmware. Why do you want to unroot?
Because, I've always had bad luck with root and everything never works for me when I try it. Once a stable rom comes out, I will try my luck, but not at this moment.
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tmac42 said:
Because, I've always had bad luck with root and everything never works for me when I try it. Once a stable rom comes out, I will try my luck, but not at this moment.
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Good choice. Sorry I can't be of more help
I don't think just rooting is going to cause issues. Keep it and enjoy those benefits for now.
My BackUp Pro is good for backing up most things on phone. Of course you got Titanium BackUp too.
I didn't even want to flash roms on this phone. After years of doing it I was getting tired. But, did it anyway. I like TW, so don't care about aosp etc. All I really gained from flashing was some theming and nandroids. Phone, I thought, was exceptional even unrooted.
There is now stock available which was taken from Samsung Kies. Just download the file and you'll be able to flash it in odin!
Can you provide a screen shot... Last anyone knew there is no MF3 on Kies.
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graydiggy said:
Can you provide a screen shot... Last anyone knew there is no MF3 on Kies.
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Not on sammobile, mdb and mdl only
rockshot2 said:
There is now stock available which was taken from Samsung Kies. Just download the file and you'll be able to flash it in odin!
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Can you link us? I haven't seen anyway to flash back to mf3
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Andrew149 said:
Can you link us? I haven't seen anyway to flash back to mf3
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Sorry about that, just saw it was for mdb.
rockshot2 said:
Sorry about that, just saw it was for mdb.
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Thats for mdl I just read a couple pages nothing successful for mf3
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rockshot2 said:
Sorry about that, just saw it was for mdb.
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Wow--watch your links--
Your unedited post made it sound like you already ran it--
"Just make sure you're on windows and it'll work beautifully! It was only til recently that mf3 started to show up through Kies. Thank AdamOuler, he's the real genius behind all of this!:
I don't know about complete restore, but some people where successful on unrooting on mf3. I didn't try it. If anybody is interested, here it is:
http://forum.xda-developers.com/showthread.php?t=2396258&page=4
Update: just did the unroot method on mf3,and it fully unroot when I used root checker, it said sorry. So I guess it gone. Still runny fine five minutes after.
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Updated to 4.2.2, get no signal now

I restarted my phone, reinserted the Sim tried everything I'm still not getting signal, anyone have this problem?
Sent from my Nexus 4 using xda app-developers app
How did you update? OTA, flash ROM, etc...Have you tried SIM in a different phone? Could be a bad radio? What does your baseband say in System> About phone?
It was the official OTA
I never updated because 4.2.2 killed LTE but then I did anyways
My baseband says unknown
Edit: the 4.3 update came, I tried updating but it said error half way through wtf!!!
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See this a lot, updating killed the radio. You probably don't have an imei number either.
Try flashing an official factory image.
baseballfanz said:
See this a lot, updating killed the radio. You probably don't have an imei number either.
Try flashing an official factory image.
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Yeah no imei number
How do I flash? I'm a huge noob to this kind of stuff, will I have to erase all data?
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Data has been borked since the 8/30 build.
kthejoker20 said:
Data has been borked since the 8/30 build.
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What
Sent from my Nexus 4 using xda app-developers app
subxero123 said:
Yeah no imei number
How do I flash? I'm a huge noob to this kind of stuff, will I have to erase all data?
Sent from my Nexus 4 using xda app-developers app
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Very good thread here.
http://forum.xda-developers.com/showthread.php?t=2010312
Good luck
baseballfanz said:
Very good thread here.
http://forum.xda-developers.com/showthread.php?t=2010312
Good luck
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Do not know how to do that... Going to have to RMA this
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subxero123 said:
Do not know how to do that... Going to have to RMA this
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Don't waste time with doing anything else. Flashing the factory image will not get your imei number back and without it, you will never get a signal. When you call to RMA it, be sure to tell them you lost the imei number during the upgrade process. They should have plenty of lost imei cases in the system already.
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Regardless it's safe to just flash the factory update, then see where you can go from there if all fails use that as your last resort
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Lost mobile signal!

I'm running sacs rom. And last night sometime I lost my mobile signal. I'm unable to make any calls and have no Internet. And yes I paid my bill. If someone could point me in the right direction it would be greatly appreciated
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Does it show no signal bars and has a red X in it?
I had this on stockish v4 two days ago while I was messing around with random files. I was able to solve it by dirty flashing the ROM again. Then connecting to WiFi and updating profile.
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No. I don't have anything. I even did a clean install of newest rom. I connect via wifi and I get a preparing network and searching for service.
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Okay so I figured out that my radios suddenly disappeared. I tried flashing the latest radios through Oden with a pass. But they are not sticking. Any ideas?
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loumoli said:
Okay so I figured out that my radios suddenly disappeared. I tried flashing the latest radios through Oden with a pass. But they are not sticking. Any ideas?
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You'd need to flash the exact same modem as you had before, however it makes no sense that the modem would just disappear.... Are you sure nothing happened?
loumoli said:
No. I don't have anything. I even did a clean install of newest rom. I connect via wifi and I get a preparing network and searching for service.
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You can try calling Sprint have them reset service or if you have insurance on it take to sprint store, you may have to take it in as stock unrooted. My S4 was doing same thing, but I didn't have insurance on it, so had to send (unrooted) in for warranty service through Samsung to have it fixed.
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System Software Not authorized i337?

This is probably the worst thing that has happened but i rooted my gs4 and was trying to install a custom recovery but knowing my smart self i forgot to safestrap and like bricked my gs4. I am dealing with SECURE FAIL: KERNEL any suggestions??
R800x_user said:
This is probably the worst thing that has happened but i rooted my gs4 and was trying to install a custom recovery but knowing my smart self i forgot to safestrap and like bricked my gs4. I am dealing with SECURE FAIL: KERNEL any suggestions??
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If you see this while booting into stock recovery, that can be ignored as we don't use the stock recovery for anything other than ota.
If you see this during normal boot, you would have to Odin back to stock and start over.
Well I can't boot into recovery I get this all the time
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R800x_user said:
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No, not recovery, ODIN mode. Volume down and power.
Even after Odin restoring I still get this screen
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Thanks for helping out, I have found a solution.
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R800x_user said:
Thanks for helping out, I have found a solution.
Sent from my Nexus 5 using XDA Free mobile app
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What was it, in case others have similar problem--

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