Database Users

WIFI won´t connect after manual update to Kitkat 4.4.2

Hello everyone, i'm a new member. I apologize if my english is not good enough.
After been driven insane by one pre-installed app from my Operator (Claro Peru) i decided that it was time to root my device to get rid from that pest. I'm a noob, so i started to investigate about the safest methods to not damage my phone. My Device's model is SGH I337m.
The plan was to update the FW from JB 4.3 that came with my phone to 4.4.2 and then proceed to root. I downloaded the Canadian 4.4.2 FW with build version I337MVLUFNC1 and installed manually with Odin. After the phone rebooted, my S4 was upgraded with 4.4.2 but Samsumg keyboard was going insane, so i went to the apps and solved that cleaning the cache/data. Then i noticed that the Wifi wasn't connected, i tried to turn it on, but then a message with a shield appeared saying that my device security stopped the operation. Beliving it was only a problem with KNOX, i installed autoroot (CF-Auto-Root-jfltecan-jfltevl-sghi337m) with Odin, open SuperSU and stopped it from working, but the Wifi still wouldn't connect.
So the first thing that crossed my mind was to unroot and do a factory reset, didn't work. The FW still was 4.4.2, so i´ve been searching solutions with this FW because i've read some cases of devices that stopped working completely after trying to do a downgrade. so i don't want to go to that route for now.
After a couple hours of search, some solutions i found on the forum were:
- Install Faux123 Kernel (Found on Youtube, this would be the thread i think http://forum.xda-developers.com/showthread.php?t=2273437http://forum.xda-developers.com/showthread.php?t=2273437
- Flash a modem for i337m
- Safestrap recovery and bypasslkm.zip
- Downgrade
I haven't tried any of this methods because i dont want to get into a deeper trouble. In the first solution i'm not sure what to do because this is the files the author recommends for canadian models (i337m), but when i enter here http://faux.romhost.me/jflteatt/jb42/http://faux.romhost.me/jflteatt/jb42/ only jflteatt appears, and that would be i337 model, isn't it? I thought that installing it may cause more troubles, so i didn't do it.
For the flashing modem method, i'm not really sure if installing a modem from another country would get me in trouble, so again i didn't proceed.
I found the Safestrap and recovery method on a downgrade thread for the i337, so again, didn't do it.
So, is there a way to get one of this methods working on i337m to get wifi working again, or is there any other better method to get back wifi.
I would really appreciate any help you can give me guys.

Copellius said:
... My Device's model is SGH I337m.
The plan was to update the FW from JB 4.3 that came with my phone to 4.4.2 and then proceed to root. I downloaded the Canadian 4.4.2 FW with build version I337MVLUFNC1 and installed manually with Odin. After the phone rebooted, my S4 was upgraded with 4.4.2 but Samsumg keyboard was going insane, so i went to the apps and solved that cleaning the cache/data. Then i noticed that the Wifi wasn't connected, i tried to turn it on, but then a message with a shield appeared saying that my device security stopped the operation. Beliving it was only a problem with KNOX, i installed autoroot (CF-Auto-Root-jfltecan-jfltevl-sghi337m) with Odin, open SuperSU and stopped it from working, but the Wifi still wouldn't connect.
So the first thing that crossed my mind was to unroot and do a factory reset, didn't work. The FW still was 4.4.2, so i´ve been searching solutions with this FW because i've read some cases of devices that stopped working completely after trying to do a downgrade. so i don't want to go to that route for now.
After a couple hours of search, some solutions i found on the forum were:
- Install Faux123 Kernel (Found on Youtube, this would be the thread i think http://forum.xda-developers.com/showthread.php?t=2273437http://forum.xda-developers.com/showthread.php?t=2273437
- Flash a modem for i337m
- Safestrap recovery and bypasslkm.zip
- Downgrade
I haven't tried any of this methods because i dont want to get into a deeper trouble. In the first solution i'm not sure what to do because this is the files the author recommends for canadian models (i337m), but when i enter here http://faux.romhost.me/jflteatt/jb42/http://faux.romhost.me/jflteatt/jb42/ only jflteatt appears, and that would be i337 model, isn't it? I thought that installing it may cause more troubles, so i didn't do it.
For the flashing modem method, i'm not really sure if installing a modem from another country would get me in trouble, so again i didn't proceed.
I found the Safestrap and recovery method on a downgrade thread for the i337, so again, didn't do it.
So, is there a way to get one of this methods working on i337m to get wifi working again, or is there any other better method to get back wifi.
I would really appreciate any help you can give me guys.
Click to expand...
Click to collapse
ok so you have the i337m canadian version... making anything related to safestrap and the att i337 irrelevant, completely different methods so don't get them confused lol
you were updating from stock 4.3 right? your best bet is to factiry reset and reflash stock fw for 4.4.2 before you brick your device... kitkat is very different from 4.3, maybe read up on it a bit too...
for ex, the "message with a shield appeared saying that my device security stopped the operation" isn't related to needing to root, it's an option under security settings.
to enable superuser on kitkat you need to enable developer options, then enable superuser. I prefer supersu so manually install that from play store afterwards. I recommend checking and/or enabling this as soon as the phone completes booting up after flashing.
also I think there's a known issue w/ 4.4.2 and wifi not turning on until after 2nd boot completed if I rememebr correctly, been using 4.4.4 for awhile now though so could be wrong...
good luck and check out the help section :angel:

Rooted and Unlocked [att to tmobile] Nothing working!

Hi! I am having major issues with my s4 i337 after switching from att to tmobile. The phone was unlocked so I took it upon myself to unlock it. It is unlocked but sometimes or rather most of the time does not pick up the network. When it does have data connection, it is Edge. I flashed the NC1 to root my phone, then reflashed to NJ4 (to unlock) but now nothing works. No wifi, camera fails, no multitasker, no voice assistant. Please help!!!!! I don't know what to do. I should have never unrooted it to unlock. I should have paid the $35 to get an unlock code. Can I fix this?
I have tried multiple APN settings,
Tried reflashing what I found online as att official firmware but it fails on ODIN.
So reflashed to NJ4, it is a bit laggy as well. Tried wifi which is greyed out, Camera still shows failed, pressing the home button to open multitasker and voice assistant brings up a blank grey screen. Phone is no longer connected as a mass storage device, only charges and can connect to ODIN.
I have attempted to factory reset which doesn't go through, unroot through SU which gets stuck on uninstalling and even trying to do an emergency recovery on Kies where it fails and gets stuck on kies failure mode.
I am on 4.4.4

I'm not sure what you mean by re flash to nj4, but have you flashed the nb1 tar? http://forum.xda-developers.com/showthread.php?p=50912149
Sent from my Nexus 5 using XDA Free mobile app

jd1639 said:
I'm not sure what you mean by re flash to nj4, but have you flashed the nb1 tar? http://forum.xda-developers.com/showthread.php?p=50912149
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse
No I have not tried that one! Should I try it and which version should I use since I am rooted?

jd1639 said:
I'm not sure what you mean by re flash to nj4, but have you flashed the nb1 tar? http://forum.xda-developers.com/showthread.php?p=50912149
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse
I guess I was following outdated information for rooting. =[ Which was dated 2013.... Should have sensed something was wrong.
I flashed this and it worked perfectly as you suggested! THANK YOU SO MUCH. No more sleepless nights combing through forums, thanks to you! Everything works and is back to normal, I was about to just throw away this phone thinking I permanently broke it. AGAIN MANY THANKS! I'm scared to root it now.
Although I have one more question, if you could please answer.
After booting and everything working, in the notification, it says unauthorized access and to restart to reset changes made, if I dismiss it, will this fix be permanent and not revert to the unworkable state it was in? When I reboot manually?

vannicuhh said:
No I have not tried that one! Should I try it and which version should I use since I am rooted?
Click to expand...
Click to collapse
It doesn't really matter since you can root the device in either case. The rootable nb1 can be directly rooted. The other one, you'll have to update to nc1 to root. Flashing with odin, you will lose and will have to re-root. Also, see "Index All things AT&T...." by Gutt13 in the General Forum

vannicuhh said:
Hi! I am having major issues with my s4 i337 after switching from att to tmobile. The phone was unlocked so I took it upon myself to unlock it. It is unlocked but sometimes or rather most of the time does not pick up the network. When it does have data connection, it is Edge. I flashed the NC1 to root my phone, then reflashed to NJ4 (to unlock) but now nothing works. No wifi, camera fails, no multitasker, no voice assistant. Please help!!!!! I don't know what to do. I should have never unrooted it to unlock. I should have paid the $35 to get an unlock code. Can I fix this?
I have tried multiple APN settings,
Tried reflashing what I found online as att official firmware but it fails on ODIN.
So reflashed to NJ4, it is a bit laggy as well. Tried wifi which is greyed out, Camera still shows failed, pressing the home button to open multitasker and voice assistant brings up a blank grey screen. Phone is no longer connected as a mass storage device, only charges and can connect to ODIN.
I have attempted to factory reset which doesn't go through, unroot through SU which gets stuck on uninstalling and even trying to do an emergency recovery on Kies where it fails and gets stuck on kies failure mode.
I am on 4.4.4
Click to expand...
Click to collapse
ODINing to NB1 should definitely help, but as far as mobile data if it still isn't working I thought i read somewhere that T-Mobile needs the AWS bands or something and you'll have to follow the process to enable those. There's a thread somewhere in the General section to do it on 4.4

sim unlock screen keeps force closing

I'm having a weird issue.
Finally paid off the Tmobile note4 not too long ago and i requested the sim unlock code. So with that in hand I should be ready to go.
It took a while for me to find someone i knew with a ATT micro sim that i could use. Many people have nanos or is on TMO. Popped in their sim and booted up phone, no unlock screen. So i attempted to make a call and then the unlock code prompted up but INSTANTLY right after it FORCED CLOSED. Rinse and repeat, same thing happens.
I think the forced closed message was " about.phone" but I didn't think to write it down at the time, i was just mad. So i'm asking if there is a way to get the SIM unlock screen to pop up without a foreign sim?
Right now i'm a Note4 running dr.ketan rom on MM. I'm debating on switching ROMs and trying again or going back to stock for a brief moment (but i forgot how to go back to stock)

Anyone have this problem?
Sent from my SM-N920G using Tapatalk

Total guesswork on the first part of your problem.
Did you install the (correct) bootloader and modem files for the Dr. Ketan ROM before installing the ROM itself?
When I used that ROM, the latest bootloader and modem files didn't work. So I used the ones mentioned and had no problems after that.
To return back to stock MM 6.01, I cleared everything in TWRP. I just flashed the official firmware via Odin. No need to bother with bootloader and modem files.
Then I restored my Nandroid backup, after flashing TWRP.

0-0-0 said:
Total guesswork on the first part of your problem.
Did you install the (correct) bootloader and modem files for the Dr. Ketan ROM before installing the ROM itself?
When I used that ROM, the latest bootloader and modem files didn't work. So I used the ones mentioned and had no problems after that.
To return back to stock MM 6.01, I cleared everything in TWRP. I just flashed the official firmware via Odin. No need to bother with bootloader and modem files.
Then I restored my Nandroid backup, after flashing TWRP.
Click to expand...
Click to collapse
I'm pretty sure Dr ketan rom was correct. Everything works great aside from the documented youtube issue at 1080.
My issue was only when trying to sim unlock the phone. It forced closes the screen/dialer app everytime. Hence why I think it was ROM related.
Any link to factory dok2 rom?
Sent from my SM-N920G using Tapatalk

OK2 Carrier Unlock & ROM Questions

I've got a S4 AT&T running OK2 with root and it ran my AirVoice Wireless SIM perfectly fine for a month while I researched and got a new phone. I'd now like to use it as a backup phone with a FreedomPOP SIM but it's giving me grief about "SIM network unlock PIN". This is the carrier lock correct? I found a tutorial that has you go into the Service Mode and turn off NETWORK LOCK. This tutorial doesn't seem to work (missing the options) in OK2. Do I have to downflash to 4.2.2 in order to get these options? If so, how do I go about doing that? I put OK2 with root on this phone but that process took 2 days and with all the mixed info out there and different versions, it's confusing to say the least.
My other question is, I tried flashing TWRP (jflteatt) and I believe I ended up with the "software not authorized by AT&T" error. Doing some reading, it looks like this may be due to not using a loki'd TWRP?
Any pointers/tips would be much appreciated. All this Samsung stuff is way over my head despite having rooted, recoveried and rom'd maybe a dozen Android devices. I much prefer LG and Moto

natenkiki2004 said:
I've got a S4 AT&T running OK2 with root and it ran my AirVoice Wireless SIM perfectly fine for a month while I researched and got a new phone. I'd now like to use it as a backup phone with a FreedomPOP SIM but it's giving me grief about "SIM network unlock PIN". This is the carrier lock correct? I found a tutorial that has you go into the Service Mode and turn off NETWORK LOCK. This tutorial doesn't seem to work (missing the options) in OK2. Do I have to downflash to 4.2.2 in order to get these options? If so, how do I go about doing that? I put OK2 with root on this phone but that process took 2 days and with all the mixed info out there and different versions, it's confusing to say the least.
My other question is, I tried flashing TWRP (jflteatt) and I believe I ended up with the "software not authorized by AT&T" error. Doing some reading, it looks like this may be due to not using a loki'd TWRP?
Any pointers/tips would be much appreciated. All this Samsung stuff is way over my head despite having rooted, recoveried and rom'd maybe a dozen Android devices. I much prefer LG and Moto
Click to expand...
Click to collapse
Yeah you're carrier locked. I think you can only downgrade to NB1 from OK2, not sure you can carrier unlock on NB1 or not. As for installing TWRP you can't due to the locked bootloader. You can only use safe strap recovery and boot only custom touch wiz roms. Loki only works on the MDB and MDL bootloaders, once you've upgraded the bootloader past MDL, you can't go back.

If the AT&T phone is like the i337m and m919, you may be able to flash down to 4.4.2, flash a 4.2.2 modem, root, run regionlockaway, upgrade modem back to 4.4.2.

Thanks for the replies. I grabbed NB1 from here: https://forum.xda-developers.com/showthread.php?t=2616221
and flashed it via Odin. All went well but when it came time to follow various instructions I found online, they either yielded no unlock or the options weren't in the menu. I don't think the free unlock trick via the service menu works on 4.4.2/NB1.
I researched a bit more and feel very stupid with one of the results that came up... AT&T offers online unlocking of their devices and you don't even have to be one of their customers! I figured I could go to one of their retail stores but also figured they would deny me since I'm not a customer. I'll be jiggered though, here it is: https://www.att.com/deviceunlock/
Slapped my IEMI in with my e-mail and in less than an hour or so, I got my unlock code for free. AT&T said they would e-mail it but I checked back on the status page and found the code there. Hopefully this helps other people.
So, moving forward now, is OK2 the best I can do with a locked bootloader? I ran it for a while but I found that I burned through my data real quick because when I would leave my WiFi coverage and come back, it would reconnect but for some reason wouldn't actually use WiFi (data was still on, had the 4G icon) until I restarted the phone. Basically, every time I left and came back home, I had to restart my phone. Is this a known issue, did I botch something in the install process? I may make another thread for this.
*EDIT*
Running OK2 for a while, I no longer have the WiFi issues I had before. Doing some thinking, I can only attribute the issue to either incorrectly followed steps the first time around flashing OK2 or the use of the debloater script found in the OK2 downloads thread. I've been using Link2SD to remove system apps and so far haven't removed anything that has affected WiFi.

SPL-L720 software not recognized by samsung has been found on your phone..

I'm trying to unlock my sprint samsung galaxy s4 so that i can use tmobile. I'm a complete noob so I just did some research and tried to follow directions correctly. I've managed to first flash the phone from l720vpsgpl1 to mf9 then to mdc using odin. Then when I tried to unlock the phone, for some reason the service mode page is blank and the imei number is missing. I read somewhere that i have to flash it back to mf9 and root the phone. I rooted it with cf auto root through odin. Everything seemed to be fine until "software not recognized by samsung has been found on your phone" with a yellow triangle showed up upon reboot. I can't even get past the logo screen. I have it back in download mode now and tried to flash mf9 again...Honestly I don't know what I'm doing and have spent days trying to unlock my stupid phone. Someone please help and give me precise directions. Thank you so much.