yashsingh1/xdaforums huggingface dataset:
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] freakonthefiddle:
Firmware mismatch, no wifi/data, next step?

Noob and first post - thanks for any help. I read many posts, but did not find my particular case covered. If I missed it, just link.

I was happily rooted with CM11 for ~3 years, until mobile data stopped working with the following:

Settings info (stock on 7/7/2013)

Software version:	L720VPUFNG2

Hardware version:	L720.08

Model #:	SPH-L720

Android version:	4.4.2

Baseband version:	L720VPUFNG2

Kernel version:	3.4.0-2162929

dpi@SWDD6013 #1

Wed Jul 9 09:04:04 KST 2014

Build #:	KOT49H.L720VPUFNG2

SE for Android Status: Enforcing

SEPF_SPH-L720_4.4.2_0032

Wed Oct 15 17:04:35 2014

Secure boot status: Type: Samsung

Security software ver: MDF v1.0 Release 2

SELinux status:	Permissive

...then I made a huge mistake and updated to OK3 with Odin. (yes, now I know how stupid that was). After recovering from a soft brick using Heimdall and successfully installing TWRP 3.0 via the TWRP SuperSU method (although SuperSU did

not

give me the option to remove KNOX on the next reboot) I am ready to proceed (still no wifi/data). I have the following config now - differences from previous in red:

Settings info (stock on 3/1/2016)

Software version:	L720VPUFNG2

Hardware version:	L720.08

Model #:	SPH-L720

Android version:	5.0.1

Baseband version:	L720VPUFNG2

Kernel version:	3.4.0-4745659

dpi@SWDD3310 #1

Wed Nov 8 16:38:44 KST 2015

Build #:	LRX22C.L720VPUGOK3

SE for Android Status: Enforcing

SEPF_SPH-L720_5.0.1-1_0039

Wed Nov 18 16:41:43 KST 2015

Secure boot status: Type: Samsung

Security software ver: MDF v1.0 Release 4

VPN v1.4 Release 4

KNOX version: 2.3

My goals are

1. rectify firmware/modem so I can have wifi and data - from what I read I cannot go back with KNOX

2. remove KNOX if possible - SuperSU did not give me the ability to do this.

Thanks for any help!
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
The reason you don't have wifi or data is your Baseband (aka modem) didn't change. flash the OK3 modem from here - http://xdaforums.com/showthread.php?t=3313843
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Isiel:
Hello guys, thanks for all your help! However, I have no idea which files to download in order to root my phone.

Could anyone kindly give me link for my phone model SPH-L720T with firmware of OK3?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] elcocolo50:
Hi.. download 2.8.4.0.tar and flash with odin

https://dl.twrp.me/jfltespr/
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
From your post, it looks like you are on a 720 model not 720T. Perhaps you flashed 720T OK3 firmware on a 720 phone. This is a 720T thread. Please read red text on post 1 ( OP ).
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
Good eye, I missed that.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] freakonthefiddle:
Thanks bilgerryan, that was simple. All squared away!
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Glad you got it working.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Isiel:
Hello, thanks all for your solution. I have rooted my phone however I have no idea which files to delete to remove Sprint bloatware. Could anyone help me by posting the files name which I'm suppose to delete?

Sorry for all the inconvenience caused.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Deleted
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Take a look at the "BLOAT WARE LIST" subsection under the "MISC" section of the OP.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] signedx:
Will I be able to downgrade and root without tripping Knox, or no way to root updated GS4 without tripping Knox flag?

Doesn't seem possible to root on upgraded GS4, but just wanted to clarify. Debating if it's work tripping Knox or not.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Isiel:
Hello, I seen the list but when I go Application manager, it doesn't allow me to uninstall the applications but instead it shows uninstall updates. Is there any solutions to this? :)
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
No way to root without tripping knox
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
To disable and or uinstall some apps you need a third party tool and root. I use titanium backup and I freeze the apps.

I use titanium because I've already paid for it. Titanium is overkill though, and I know there are better ones you can try.

This one is popular "Root Uninstaller"

https://play.google.com/store/apps/details?id=com.rootuninstaller.free

(Don't be fooled by the name. It's not for uninstalling root. It's for root users to uninstall or disable apps)

And one of my super sharp tech savvy security friends likes this one "App Quarantine ROOT/FREEZE"

https://play.google.com/store/apps/details?id=com.ramdroid.appquarantine

EDITED [MENTION=7220597]Isiel[/MENTION]
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] signedx:
Now to decide if I want to trigger the Knox flag or not. Part of me doesn't care since I want to try out custom roms, but not sure. Not like I'm going to pay for a repair from Samsung.

I had a M919 before (switched to Xperia for a year or so) and it was 0x1, tried out a few roms on that one before it stopped working.

What ROMs are you guys currently running?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Isiel:
Thanks for this solution and thanks everyone that helped me! I am now able to delete sprint bloat ware and I have learnt how to root phones. :)
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] stryfe2010:
Originally had a 720 then got a unlocked at&t s4 because other got damaged now I have a L720T from seller on ebay who advertised it as a L720. So far I have been able to root it, go from 5.01 back to 4.4.2 (even though it was stated in a few places that this was not possible). Software Ver. L720TVPUAMK5, hardware ver. L720T.03, android ver. 4.4.2, Baseband L720TVPUAMK5 and build number KOT49H.L720TVPUBNG5. I was able to unlock it after downgrading modem, enabling gfc in service menu and using the SSU apk. I know have it on straight talk with 3g data so far.

My main question now is how to fix the wifi? Wifi hasn't worked since purchase and I've done a lot of searches but haven't been able to find a conclusive fix. Should I try a stock nc6 and then go through the root and unlock process again?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] nb26:
Can confirm that the following flash method for SPH-L720T:

-TWRP in download mode with immediate boot into recovery

-flash cyanogen mod12.1-20151116

-flash xposed-v80-sdk22

-flash UPDATE-SuperSU-v2.65-20151226141550 (must save as have had to reflash it about 5-6 times before it just stuck

-install xposed, xprivacy, greenify, kernel auditor, etc sometimes they crash but come back quick....gravity box mods a few things which I like. Can't get rotation to landscape at all on desktop.

Currently working on Sprint network. :| Hasn't been easy.

Haven't diabled knox, but it works and I have root. Battery last maybe a day after battery calibrator, kernel auditor running on conservative max about 500Mhz + Aggressive multicore power saving; set screen to half and greenify

Failed to unlock Same build via imei changer to PagePlus, though still working on trying to figure out how to open the hidden menu.....help appreciated. Anything to do with their changing their policy last year to not let phones from other carriers on their networks?

NB26

-Sent from my body onto a keyboard wirelessly routed to a wireless usb hub to Tor Browser (wherever else it goes from there) Cheers!
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bhtx:
I've flashed TWRP recovery and flashed CM 12.1. Is it possible for me to unlock this phone in its current state? If not, what steps would I need to take to unlock it? Replies greatly appreciated.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
http://xdaforums.com/showthread.php?t=2530610
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
[MENTION=6702630]bhtx[/MENTION]

Check out the UNLOCKING FOR USE ON OTHER CARRIES section in op (post 1)
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Avan7:
Deodex!

Hello! Could some fine soul upload (or re-upload) the deodexed OH1 rom?

Or any deodexed lollipop rom?

That would be awesome! I have searched a lot for one without good results.

Thanks!
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
http://xdaforums.com/showthread.php?t=3115583
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
[MENTION=4590326]bthorne79[/MENTION] Can you please make a deodexed OK3 sprint firmware? And do you know of any 720T Roms yet where WiFi calling still works?

If anyone else can answer this and/or make the deodexed OK3 please chime in.

I've got a 2nd just for fun 720T that I'm starting to play with to learn more.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Isiel:
Hello, I'm here for a solution on unlocking sim card for gsm use.

I would like to know that if I downgraded my modem to mk5, do I need to upgrade it back to OK3?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
No
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
Have you tried a different USB cable? It sounds like the one you are using is fried or your USB port on the phone is messed up. The USB port requires soldering and is pretty expensive to replace. This problem has absolutely nothing to do with root, by the way.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] life-in-3D:
Does anyone here know what to do about the phone issues in android 6.0? I cannot get the phone to make calls reliably nor will it receive them. Additionally I cannot switch the audio playback option in a phone call either... No matter what is selected it always comes through the earpiece? Anyone else experience / solve these issues? Is anyone willing to test official CM13 nightly to see if they have matching issues?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] oberon567:
Thanks.

I tried various cables and various USB ports (USB 2 and 3) and the problem kept happening. Today, though, the first time I tried it cycled only for about 10 seconds and then became steady with recognizing the connection. The second time I tried at first it did not recognize at all, and I unplugged and plugged it back in and it recognized correctly and did not cycle. The third time it recognized right away and did not cycle.

I have no idea why. Same cable and ports as before.

I am going to flash the OctOs ROM, I think, because that I can do without being connected to Odin or anything, now that TWRP is already installed, just as a precaution.

One other thing to note, maybe to even add to the OP: One of the reasons I wanted to flash a custom ROM was to be able to use the WiFi tether, as Sprint disables it without activation. The OP lists two workarounds, one is an app and one is editing the telephony.db file by adding dun to the parameter type. Well, I tried a third method, which was I added dun to my APN type (it now reads "default,supl,mms,dun") and once I did that the WiFi tether works fine, though it is limited to connecting to only a single device at a time. Maybe that is a result of the carrier I am using, I am not sure, but in any case, it was that easy for me.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
Well now that you have TWRP installed make a full backup of your ROM before installing anything else. That way you can always go back to the way it is now. As long as you are on a fairly recent firmware (OD2, OH1, or OK3) you shouldn't need to Odin anything for any ROM. I'm actually about to release an update to my ROM, Wicked X- here. Which is stock based rather than AOSP (like OctOs), if you prefer stock based to AOSP.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] fsstcyr:
No sim card detected?

Sprint L720T

Software ver: L720Tvpucok3

Hardware ver: L720T.03

Android ver: 5.01

1-11-15

Kernel ver: 3.4.0 - 4745659

Older phone any suggestions how to get 4glte going again? Only 3g works. Thanks
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
What carrier? You need a SIM card for 4G LTE on Sprint's network (as far as I know), this device doesn't support 4G on any other network (besides Sprint affiliates like Boost, Ting, Ring+, and Virgin Mobile).
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Very interesting. When I get time, I'll work on adding this to OP and give you credit thanks. A lot of users don't have their APN section unlocked to where they can edit it. So will need to consider that.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] fsstcyr:
Yes I have. Sometimes it works, but never for very long. Yesterday i was at work all day on their WiFi and the no sim card msg stayed away for almost 7 hours. Longest in sometime. I am going to do a but more research then dive right in. I appreciate the help
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Isiel:
Hello, I have an issue of unlocking sim card for international use.

These posts' solution doesn't work on Lollipop:

"UNLOCKING FOR USE ON OTHER CARRIERS

The following unlock for overseas solution has been brought forward by kmani.k78 post 1355 and mkardash in post 1363.

Tap here to go to the unlock solution thread and follow the directions on post one.

aalyatim in post 1392 offers a unlocking solution for domestic use which apparently requires the user to downgrade the modem to MK5 first. MK5 modem can be found in the downloads section at the bottom of this OP. Also check out instructions from broad_st_bully post 1626.

You can also use Galaxy tools to perform a sim unlock."

Are there any solution to unlock sim card international use?

Thank you for your time! :)
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
In the OP, did you tap on the word "here" to go to the unlock thread? It's a link to take you to the unlock thread were you can get advanced help on unlocking your 720T.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Updated intro to OP

Updated twrp links in twrp root method area

And added APN method to Hotspot section of OP, credit [MENTION=7370999]oberon567[/MENTION]
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] oberon567:
I have a Galaxy S4 L720t, baseband OA3. I am living in India. Previously I had rooted and used SSU to unlock the SIM, and I had to manually input my carrier's APN but after that it worked for voice/sms/and data (3g only, the phone doesn't support the 4g bands used in India). I just flashed to the latest stable OctOS M build, with Android 6.0.1, the flash went smoothly but now I am only getting "Digital Roaming" in place of my carrier.

I do not know if this is because I need to re-unlock the SIM, because I need to create a new APN, or both. However the SIM-unlock program SSU does not work with 6.0.1, and there does not seem to be any method for me to edit the APN, so I am not sure what to do next. I posted a message on the Team OctOS thread but thought I would post one here too, because if the ROM works as well as it seems to it would be good to have the information on this thread for other L720t users.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
[MENTION=7370999]oberon567[/MENTION] from the OP, I recommend you try this thread http://xdaforums.com/showthread.php?t= for unlocking questions.

When you find the answer, would appreciate if you post details here for all of us, and I can add the knowledge to the OP for all of 720T users.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] oberon567:
Unfortunately, no help in any of the unlock threads there.

That program (SSU.apk) is what I used in the first place, but now it crashes... it seems anyone running Lollipop or above is experiencing this, when I install it there are no errors but it crashes immediately upon opening.

Galaxy Tools, another suggestion, is a discontinued program, it stopped development 9 months or more ago, so I am going to bet that it also does not help much with 6.0.1, but I will give it a try.

I am not sure if there is any way to determine if it is SIM locked or if it just does not have correct APN settings.... I mean, before I flashed this ROM, if I had it set to LTE/CDMA instead of GSM/HSPA then it would say "Digital Roaming," same as it is saying now. So if I am lucky the SIM unlock survived the flash, and all that needs to happen is the settings be corrected, somewhere, somehow...
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Not sure if galaxy tools will run on non stock firmware, but If you can run galaxy tools, it can tell you if Sim is locked, and it can unlock/make editable your apn section.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] oberon567:
Need to edit APN on OctOS-M Android 6.0.1

UPDATE 2: Installed Galaxy Tools, and it confirms that the sim is unlocked! But when I click the APNs button it crashes. So now it is up to OctOS to either give me a way to change the APNs, or if someone else has any advice about how to do when there are not any APN edit options included in the ROM (OctOS M stable build, Android 6.0.1). Noteworthy: In the about section of the settings menu, my model number is now listed as SPH-L720 - without the T - but my baseband still hasn't changed, still is L720TVPUBOA3.

UPDATE 1: I installed GalaxSIM unlock, which said my device was not supported at the moment BUT when I chose the option to see the details it listed my SIM provider was airtel, which is the local SIM that I am using. So that suggests to me the SIM unlock is good, and only new APN settings are needed....

Original: I installed Galaxy Tools and it installed and ran fine, or so it seemed, but said my device was not supported and therefore other than getting to look at the galaxy tools menu I could not do anything. (That said, though, I am a bit doubtful if it was the real Galaxy Tools or a fake one... since the project is discontinued there is no official link, and I have seen different installers of different sizes and so forth... And somehow, now, after uninstalling galaxy tools, I no longer have an icon for SuperUser.. SuperUser still grants root permission to other programs and it shows up in Settings->Apps, but I cannot access the UI of the program...

I would suppose it is against the rules to post links to download the real galaxy tools, since it is a discontinued project and admins removed links from other forums, but if anyone might tell me where i might look, or even the correct filesize or something, anything that won't violate the rules but would help ensure I am dealing with the right software, that would be appreciated... But I am betting it will not work in my situation anyway...

(Edit - I realized that to access SU I need to go through OctOS's Tentacles program.... but I could swear it used to have its own shortcut, too...)
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
I would go back to your stock ROM and then use Galaxy Tools as it is only meant to run on Touchwiz.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] oberon567:
Thanks, but the whole point is I want to get off of the stock ROM, and the incredible bloat and branding of Samsung apps and Sprint fingerprints that come with it. Newer versions of Android (my stock was running 4.4.2) have better battery life too, which is appealing.

When I was on stock everything worked. By default I had access to all of my APN settings. If I go back there then I have no need for Galaxy Tools.

If I flash Wicked-X ROM will I be able to modify my APNs to make sure I can get the settings I need?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
Yes and I also have a Bare Bones version out with a whole lot removed.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
That's not how u open up apn in gt.

If it will ket you, go in gt. In upper right hand corner change sales code and default code to XAS

may have to reboot.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] oberon567:
Sorry, I had tried that as well, but didn't mention it. When I click "set" it says it was granted SU privileges, but when the phone is reset - or even if GT is closed and then opened again - the code is no longer set to XAS.... And nothing elsewhere changes... Going through the various network setting screens and so forth there is no even anywhere that APNs are mentioned... might just not be allowed with this ROM
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Isiel:
Hey oberon567, how did you get galaxy tools? Can you link me?

Thanks ! :)
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
https://www.dropbox.com/s/gluf7517nz01sh5/GTv3.1.5.apk?dl=0
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Isiel:
Hello, I downloaded the Galaxy Tools. However I have no idea how to unlock the sim card. I have set every XAS and rebooted but my phone still prompted Invalid Sim card.

Are there any solution to this?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
There's an Unlock UICC SIM in Galaxy Tools. XAS is only a product code telling the phone you are not using the Sprint or Boost or Virgin Mobile network.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Isiel:
Hello, it tells me to enter a control key. May i know what is the control key?

Thanks ! :)
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
I don't know, I've never needed to use that option.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Isiel:
Hello, thanks for the Galaxy tools anyway! :)

[MENTION=7370999]oberon567[/MENTION] Do you have any idea how do I get control key to unlock Sim card?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
I THINK that is the MSL number of your phone which you will need a special tool to retrieve it..such as SPCUtility.apk
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Oh, and did you downgrade the modem to MK5 first?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Isiel:
Hello, I did downgraded my modem to MK5. How can I get SPCUtility.apk or special tools you mentioned?

EDIT: I'm on Android Lollipop 5.0

Thanks ! ;)
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] oberon567:
Sorry, my SIM card was unlocked when I used GT... GT actually gives the MSL code, though. Right above the button to unlock the sim it states the status of the SIM, and right above that it says the MSL key.

Did you update GT to the 3.18? After installing GTv3.1.5.apk (and running it at least once and giving it rot permissions) you need to run GTUpdate2_v3.1.8.apk, choose the update button, and then reboot.

If you do a Google search the the apk file (the actual name with the ".apk" included you will find copies... The original I had ended up downloading from a Chinese site but the update is on Google Docs https://docs.google.com/uc?export=download&id=0B-J93CDbZP_xbWhPaEhDYmRBWTQ .

What baseband are you using? I am using OA3, and so from OA3 running Android 4.4.2 I could unlock the modem easily using the SSU.apk method from OP. Once the SIM is unlocked it stays unlocked, even through Factory Resets and ROM flashes.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Isiel:
Hello, I'm currently using OK3 and I have updated the GT to v3.1.8 with your help. GT removed the Invalid Sim prompt but however my phone has no service. Do you have any solution to this issue?

EDIT: I got it working by going to settings -> more networks -> Mobile networks and set network mode to gsm/umts. Thank you guys very much for help. :)

I would like to ask for help about downgrading my Lollipop to Kitkat Android 4.4.2 to unlock the Sim card using SSU.apk.

Thanks ! :)
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] zwawitotti10:
i heat l720 and l720t because it has many problems
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
Like what? I love this device.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Ditto