[Q] Downgrade Modem - Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot

Hello I a new to the S4 I did have the S3 that I was able to flash and do everything I wanted so Im not totally new to this. I am trying to downgrade my modem to MDC I am currently on L720TVPUBNAF I am wanting to downgrade the modem so I can unlock sim and get the 16 digit password so I can use DFS or CDMA Workshop to get my MSL and flash my phone from Sprint to cricket. I have been able to root the S4 and flash Custom Sacs custom ROM. Whenever I try to Flash any Modems Or AIO Modem I always get Fail when using Odin by or using TRWP on the the phone. Is there any tutorials that show me how from the current Modem I am on or any sugestions. Also I have gave thought to Buying WIreless Workshop Service to allow full flash. But will I still need the MSL Number to do that or will I be able to do the full flash and all my services still work. Thanks for any info or help with this issue. MODS If the post is in the wrong Section I apologize in advance and please move to the correct area. Thanks.

ryanpedro said:
Hello I a new to the S4 I did have the S3 that I was able to flash and do everything I wanted so Im not totally new to this. I am trying to downgrade my modem to MDC I am currently on L720TVPUBNAF I am wanting to downgrade the modem so I can unlock sim and get the 16 digit password so I can use DFS or CDMA Workshop to get my MSL and flash my phone from Sprint to cricket. I have been able to root the S4 and flash Custom Sacs custom ROM. Whenever I try to Flash any Modems Or AIO Modem I always get Fail when using Odin by or using TRWP on the the phone. Is there any tutorials that show me how from the current Modem I am on or any sugestions. Also I have gave thought to Buying WIreless Workshop Service to allow full flash. But will I still need the MSL Number to do that or will I be able to do the full flash and all my services still work. Thanks for any info or help with this issue. MODS If the post is in the wrong Section I apologize in advance and please move to the correct area. Thanks.
Click to expand...
Click to collapse
First and for most not possible at the moment. You have the SPH-L720T and the unlock method that currently exists only works for the SPH-L720. So you cannot use any modems meant for the regular GS4 on the Triband version.

daniel4653 said:
First and for most not possible at the moment. You have the SPH-L720T and the unlock method that currently exists only works for the SPH-L720. So you cannot use any modems meant for the regular GS4 on the Triband version.
Click to expand...
Click to collapse
Ok thanks. So does this mean I cannot flash to Cricket at this time as well? If so is there an area for that with the version I have?
Thanks.

ryanpedro said:
Ok thanks. So does this mean I cannot flash to Cricket at this time as well? If so is there an area for that with the version I have?
Thanks.
Click to expand...
Click to collapse
Also have a triband far as i know sprint only no flashing

Related

Is it possible to flash MJ6 modem on Canadian SGH-i337m?

Hi, I was wondering if there is a way to install this Modem on my Canadian S4. Without it, turning off the screen when Running any 4.3 TW ROM will make the phone too loose signal. When using Odin, it fails and nothing get installed.
Thanks!
crzykiller said:
Hi, I was wondering if there is a way to install this Modem on my Canadian S4. Without it, turning off the screen when Running any 4.3 TW ROM will make the phone too loose signal. When using Odin, it fails and nothing get installed.
Thanks!
Click to expand...
Click to collapse
First, this question should be asked in either the Q&A section or the specific thread. Second, from what I read someone already tried and even posted in the thread and it didn't work.

[Q] Need help

hi guys
have a nice day
i have a sprint s4 sph l720 with 4.3 rom and MK2 Modem
i want to unlock the phone for international use
but to unlock it i need to change the modem to MDC/MDL first before unlock according to the thread on xda developer website
so can i change direct the modem from MK2 to MDC/MDL directly using Odin ?
or is there a way to unlock the phone with the 4.3 rom and MK2 modem ?
thank you for your cooperation for help
sobri46 said:
hi guys
have a nice day
i have a sprint s4 sph l720 with 4.3 rom and MK2 Modem
i want to unlock the phone for international use
but to unlock it i need to change the modem to MDC/MDL first before unlock according to the thread on xda developer website
so can i change direct the modem from MK2 to MDC/MDL directly using Odin ?
or is there a way to unlock the phone with the 4.3 rom and MK2 modem ?
thank you for your cooperation for help
Click to expand...
Click to collapse
If you are on the stock MK2 firmware with the Knox bootloader you CANNOT Odin to MDC or MDL or anything before MJA. Period. This question has been asked and answered dozens of times. ALL the answers you are looking for are here.
Please S E A R C H.
I believe you can Odin just the MDC modem to unlock your device. But you cannot Odin a stock tar file to downgrade. Just the modem should work. Autoprime has an MDC modem file in his international unlock thread that should work. Others on mk2 have reported successfully downgrading just the modem. If it doesn't work it will either fail in Odin, or you will have to Odin the mk2 modem back to fix it.
Sent from my icrap 2 using Tapatalk HD
Thanks for the clarification cruise350. It's true that some have been able to sim unlock with just a modem downgrade, hopefully he'll get it.
It just gets so crazy that the same questions get asked over and over. and then asked again.
change modem
thank you guys
because of you two i success to downgrade the modem to MDC without any problem
and succesfully unlock the s4 sprint mobile
and now i will need only to find a way to stop the notification of the security information that say an application attempted to access system on your device without authorization. this attempt has been blocked
i make googling and most people it is the knox problem
do you guys have a suggestion for removing the notification ?
i see this web : http://www.droidviews.com/disable-knox-security-service-on-samsung-galaxy-devices/
what do you think ?
sobri46 said:
thank you guys
because of you two i success to downgrade the modem to MDC without any problem
and succesfully unlock the s4 sprint mobile
and now i will need only to find a way to stop the notification of the security information that say an application attempted to access system on your device without authorization. this attempt has been blocked
i make googling and most people it is the knox problem
do you guys have a suggestion for removing the notification ?
i see this web : http://www.droidviews.com/disable-knox-security-service-on-samsung-galaxy-devices/
what do you think ?
Click to expand...
Click to collapse
You can use Tibu and remove everything that contains Knox in it. That did it for me.
Sent from my SCH-I545 using XDA Premium 4 mobile app
Mistertac said:
You can use Tibu and remove everything that contains Knox in it. That did it for me.
Sent from my SCH-I545 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
do i need to freeze all knox.apk or uninstall the knox.apk ?
sobri46 said:
do i need to freeze all knox.apk or uninstall the knox.apk ?
Click to expand...
Click to collapse
I uninstalled everything that contained Knox in it. I believe there was a few of them including two com.knox.xxxx
It's been a while since I did it so I'm forgetting the exact names and how many. I just used the search function in TiBu to find them so try that.
Sent from my SCH-I545 using XDA Premium 4 mobile app

[Q] Bootloader unlock for SGH-I337Z AIO WIRELESS

Hello all. I am new to this site but I enjoy it a lot and I learned a lot as well from the threads. I got AIO wireless service that has the I337 model galaxy s4. I successfully rooted my phone with Kingo root. After rooting my phone I tried to install a customer recovery on it with no success no matter what I did ( I tried every imaginable scenario). In the process of rooting my phone my kernel got damaged and my Wi-Fi stopped working. I am trying to re flash the phone with custom multi carrier rom but I think that my boot loader is locked and that is the reason I can’t install the recovery. If anyone can guide me in the right direction where I can unlock the boot loader would be amazing. Thank you all in advance
1. This section isn't for AIO wireless but I don't know if there is a section for it.
2. There is currently no way to unlock the boot loader.
3. If you want to restore it back to stock read about it in my signature.
Sent from my SAMSUNG-SGH-I337 using Tapatalk
4tele said:
Hello all. I am new to this site but I enjoy it a lot and I learned a lot as well from the threads. I got AIO wireless service that has the I337 model galaxy s4. I successfully rooted my phone with Kingo root. After rooting my phone I tried to install a customer recovery on it with no success no matter what I did ( I tried every imaginable scenario). In the process of rooting my phone my kernel got damaged and my Wi-Fi stopped working. I am trying to re flash the phone with custom multi carrier rom but I think that my boot loader is locked and that is the reason I can’t install the recovery. If anyone can guide me in the right direction where I can unlock the boot loader would be amazing. Thank you all in advance
Click to expand...
Click to collapse
seedeh said:
1. This section isn't for AIO wireless but I don't know if there is a section for it.
2. There is currently no way to unlock the boot loader.
3. If you want to restore it back to stock read about it in my signature.
Sent from my SAMSUNG-SGH-I337 using Tapatalk
Click to expand...
Click to collapse
This section is for all I337 variants. He has a different model than the AT&T I337, so that restore tar in your signature won't work and the bootloader may be unlocked for him depending on his carrier's choice.
EDIT: Here is the I337Z stock firmware. http://forum.xda-developers.com/showthread.php?t=2448794
It says they did not get a recovery working, you may be stuck to Safestrap 3.65
DeadlySin9 said:
This section is for all I337 variants. He has a different model than the AT&T I337, so that restore tar in your signature won't work and the bootloader may be unlocked for him depending on his carrier's choice.
EDIT: Here is the I337Z stock firmware. http://forum.xda-developers.com/showthread.php?t=2448794
It says they did not get a recovery working, you may be stuck to Safestrap 3.65
Click to expand...
Click to collapse
Ah. He said I337Z in the title but not the post so I was confused.
Sent from my SAMSUNG-SGH-I337 using Tapatalk
Thank you
I guess I need to do some more reading about safe strap...If you could point me in the right direction..it would be good...:good:
My phone is i337z
I Typed my mistake i337 in the body of the message.
Got my Phone to work with safestrap
Thank you again! I got my phone to work with safe strap 3.65! I loaded the Intika Locky S4 Rom v1.0 everything seems to work :good:
4tele said:
Thank you again! I got my phone to work with safe strap 3.65! I loaded the Intika Locky S4 Rom v1.0 everything seems to work :good:
Click to expand...
Click to collapse
4tele, I assume you used the AT&T Safestrap? I was not able to get AT&T Safestrap 3.65, 3.71, or 3.72 to work on my I337Z from Cricket (AIO) with KitKat 4.4.2, build number KOT49H.I337ZTUUBNE2. The app says it installed successfully, but it never seems to activate. Are you on KitKat? If so, what build number?
Anyone know if it's possible to flash the AT&T I337 MF3 firmware on the I337Z then try to unlock the bootloader using the process described below? http://forum.xda-developers.com/showthread.php?t=2387577
I used the AT&T safestap 3.65 but my phone was on MH1 firmware 4.2.2 and it worked, if you are on kitkat probably need to use the latest safestap I guess
guys check this out , maybe one developer decides to take advantage of this and help us out http://www.droid-life.com/2014/08/07/moto-x-bootloader-unlock-qualcomm/

No WiFi access via hotspot on Rooted AT&T S4

Ok, thanks to k1mu's guide here
http://forum.xda-developers.com/showthread.php?t=2565758
I was able to root my phone properly. The key reason to root the phone was no access to tethering. Details for my situation:
Samsung S4, i337, MK2, andriod 4.3 from AT&T. I unlocked it and have been using with Rogers here in Canada but the tethering gives the Mobile data not available/invalid sim error.
I researched for solutions here and on google and all solutions required root, so I rooted the phone using the guide mentioned above. After that I used the method in this link
http://forum.xda-developers.com/showthread.php?t=2535141
However, since I am using non-AT&T sim, this does not work any more. Further I uninstalled all AT&T apps using ES file explorer but still no luck.
Then I figured out and tried other solutions like FoxFi, etc etc.
Then I used the framework file from the thread below which was able to turn the toggle on.
http://forum.xda-developers.com/showthread.php?t=2512981&highlight=at&t
Now I can see the the tethering tuned on. I can also connect to the wifi. however, it does not connect to internet. I think I am still missing some piece. I cannot post in the thread above as it is developers section. But I am lost, there is no further solution that I could find on forum or google. My mobile data works fine, I can turn on the tehter, I can connect to the hotspot, but I cannot connect to internet. It is a phone issue for sure.
I am not sure what to do in this case. Any help will be greatly appreciated.
Edit: I have tried this as well, but it did not work.
http://forum.xda-developers.com/showthread.php?t=2535141
Does anyone think flashing with stock ROM will help? does it delete all system files altogether? But the only stock ROMs available are AT&T, so I do not see it helping much. Any ideas?
dexterousyash said:
Does anyone think flashing with stock ROM will help? does it delete all system files altogether? But the only stock ROMs available are AT&T, so I do not see it helping much. Any ideas?
Click to expand...
Click to collapse
If there's a tethering mod for the i337m on 4.3, try using that tethering provision instead. Otherwise, you could try flashing a ROM that uses an i337m base, but you can't flash their stock firmware directly.
Sent from my SGH-I337 running GPE
DeadlySin9 said:
If there's a tethering mod for the i337m on 4.3, try using that tethering provision instead. Otherwise, you could try flashing a ROM that uses an i337m base, but you can't flash their stock firmware directly.
Sent from my SGH-I337 running GPE
Click to expand...
Click to collapse
I have tried that tethering mod (if that means replacing the tethering.odex file in the system)
I don't know what i337m base ROM is, but if it is installing AT&T stock ROM, then won't I be in same situation again?
dexterousyash said:
I have tried that tethering mod (if that means replacing the tethering.odex file in the system)
I don't know what i337m base ROM is, but if it is installing AT&T stock ROM, then won't I be in same situation again?
Click to expand...
Click to collapse
I337m is the Canadian S4 model, I'm saying to use a tethering method designed for that (the two you posted were for the Verizion and AT&T but not Canadian) or try a TOM based off the Canadian firmware. That way it'll have the file for your specific carrier tethering already in it.
DeadlySin9 said:
I337m is the Canadian S4 model, I'm saying to use a tethering method designed for that (the two you posted were for the Verizion and AT&T but not Canadian) or try a TOM based off the Canadian firmware. That way it'll have the file for your specific carrier tethering already in it.
Click to expand...
Click to collapse
So should I look in files such as this and flash Stock rogers 4.3??
http://forum.xda-developers.com/showthread.php?t=2269304&nocache=1
dexterousyash said:
So should I look in files such as this and flash Stock rogers 4.3??
http://forum.xda-developers.com/showthread.php?t=2269304&nocache=1
Click to expand...
Click to collapse
Not the stock firmware, that won't work. I mean to try and find a ROM based off that firmware/made for i337m.
Sent from my SGH-I337 running GPE
DeadlySin9 said:
Not the stock firmware, that won't work. I mean to try and find a ROM based off that firmware/made for i337m.
Sent from my SGH-I337 running GPE
Click to expand...
Click to collapse
First of all I appreciate your patience in these replies and helping me out.
Here is my next query.
I found this custom ROM based on i337m
http://forum.xda-developers.com/showthread.php?t=2313469
This post recommended this ROM
http://www.droidviews.com/best-custom-roms-for-att-samsung-galaxy-s4-sgh-i337/
but they also said I need to make sure that the baseband matches. I have MK2. Should I flash that or should I just go ahead and install the ROM as no such info is mentioned in the XDA thread. Also, are there any other changes I should make before installing this new ROM using safestrap?
please let me know
dexterousyash said:
First of all I appreciate your patience in these replies and helping me out.
Here is my next query.
I found this custom ROM based on i337m
http://forum.xda-developers.com/showthread.php?t=2313469
This post recommended this ROM
http://www.droidviews.com/best-custom-roms-for-att-samsung-galaxy-s4-sgh-i337/
but they also said I need to make sure that the baseband matches. I have MK2. Should I flash that or should I just go ahead and install the ROM as no such info is mentioned in the XDA thread. Also, are there any other changes I should make before installing this new ROM using safestrap?
please let me know
Click to expand...
Click to collapse
You'll have to look in the All Things MK2 and NB1 thread for install instructions and if it needs a modified updater-script for Safestrap. Also, the latest version is a 4.4.2 ROM so you'll either need to update to KitKat, use the KitKat Magic Toolkit, or use an older version of Goldeneye.

i337m updated to NE3 and lost all mobile signal.

Please help me.. I have updated a SGH - I337m with Claro on 4.2.2 to a stock 4.4.2 NE3 trought ODIN and lost the signal inmediately. Emergency Calls only. Not registered on network when I try to conect manualy.
I`m not shure that my phone has unlocked and now is locked new bud I dont have a Claro Sim card, I use TIGO.
I have tried to unlock with RegionLock Away and not work for me, I have tried rooting, instaled TWRP, Philz Touch and Safestrap and I cant change my modem to try the unlock again. I tried flashing modems MF3, NC1, NE1, and I cant.
I tried too flash stock firmware 4.4.2 NE1, NC1, NE 2 , custom rom 4.4.2 and the baseband keep ever the same NE3.
Not work the Codes like *#0011#
Please help me what can I do.
My Bootloader is NE3.
You will probably have more luck in the AT&T GS5 thread.
frostedunit said:
You will probably have more luck in the AT&T GS5 thread.
Click to expand...
Click to collapse
Thank you.. bud, why did you say that? I flashed only I337m stock Firmware..
Because this forum is for the L720 Sprint GS4
frostedunit said:
Because this forum is for the L720 Sprint GS4
Click to expand...
Click to collapse
i´m so sorry.
joachamob said:
i´m so sorry.
Click to expand...
Click to collapse
No biggie

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