yashsingh1/xdaforums huggingface dataset:
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] triiuzii:
I want to install xposed on my stock rooted Galaxy S4 (L720TVPUCOK3). I know I need a deodexed rom. Can I use http://xdaforums.com/galaxy-s4-sprint/general/rom-sph-l720-ok3-stock-deodexed-t3294766 ? From the pictures, it says its "L720VPUGOK3" and I have "L720TVPUCOK3"
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
Not sure, but I know this ROM is confirmed working for the L720T and is deodexed- http://xdaforums.com/showthread.php?t=3115583
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] triiuzii:
Thanks.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
I think you would be better off finding a ROM that says 720T to help ensure better antenna support for the Triband phone. This can make a difference in Internet/data speeds, cellular reception, and maybe WiFi functionality. Of course, it also depends on how well the ROM is made.

Personally, I would want to stick to a built-to-support 720T ROM, if it was me and I was doing ROMs.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Enjoying this new xda developer app. Only wish it would allow me to upload files other than pictures like we can do from xda desktop site.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] hazrat77:
L720t cyanogenmod do'nt END CALL

Please help me, i'm install Cyanogenmod 13, all sings worked.

Problem in a "End Call", i don't hang up call!

:crying:do'nt END CALL:confused: Samsung Galaxy S4 Sprint L720T

Thank you!
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
CM13 is full of bugs
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Just upgraded to twrp 3.0.2-0 on both of my 720Ts using the upgrade from existing twrp with img file method. All seems well.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] SpaceKebab:
I (just recently) went through the same thing. Also, I wouldn't get notifications of incoming calls.

(I'm using a CM12.1 based rom though, couldn't get the APN settings to work through 13)

Did you domestically unlock your sim to use AT&T like in my case?

the issue had to do with one of the /System/lib/lirbril*whatever* files

I had to download an ATT specific CM12.1 rom and extract the dats (with Auto Tool Unpack Repack) to copy/paste a few specific .so's directly into my sprint phone's /System/lib/ folder (R/W enabled, then changed copied files permissions to RW/R/R).

Whether or not changing telephony.lteOnCdmaDevice=1 to "0" with the buildprop editor helped anything, I don't know. But I did that too.

The picture is of the files I replaced.

[IMG="The files I replaced"]http://i.imgur.com/ed0nou0.png[/IMG]
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Fahadroid:
Oh1 modem issue

I am on OH1 modem right now..

Gsm is not working in any any custom rom. What to do bro !
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] dbilauca:
SPH-L720T on Sprint going to TMobile

I have searched this thread for any references to using the Galaxy S4 from Sprint (SPH-L720T) on T-Mobile. Although there were some hits, I couldn't find anything solid with a full set of instructions. I am guessing I need to root the device and then unlock the SIM?

I have attempted to downgrade the Baseband to MK5 based on some previous threads...and it appears to have been successful.

Here are my device details from Galaxy Tools...

Model: SPH-L720T

Software: LRX22C.L720TVPUCOK3

Baseband: L720TVPUAMK5

Bootloader: L720TVPUCOK3

User has Root? Device NOT rooted

mps_code:SPR

sales_code:SPR

default_code:XAS

SIM uicc: NOT SUPPORTED

Any advice in getting mine and my son's devices to work on T-Mobile would be greatly appreciated!
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Fahadroid:
oH1 modem issue !

i m on oh1 modem with stock rom

while gsm is not working while i m flashing custom rom (any)

Please see screenshot & help me (i request)
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
You said you had the L720T earlier. This indicates different. Flash the unlocked modem I linked you to a couple days ago.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Fahadroid:
ok i m going to flash & you sure that my sim will not be locked ? right ?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
No, but you will still need to manually input the APN for your carrier.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Fahadroid:
how to input apn for my network .. where to get apn details ??
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
Settings/More Networks/Mobile Networks/Access point names

Contact your carrier, Google, ask somebody who has the same network.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Fahadroid:
Thanks [MENTION=4310299]bilgerryan[/MENTION] for helping a lot :)
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] B6000man:
Knox issue

I decided to not root my l720t because then I loose knox that sounds worth having because of security. It is hard to find any discussion about people actually wanting to use knox. I was getting ready to set it up, but to my unfortunate discovery google play store is not in the knox container, which means I cannot use any play store apps in there! I am wondering how I can get play store or apps into the knox container without having to pay those silly periodic fees I saw on the Samsung knox site? Without the ability to get the play store and its apps into the knox container it is a useless security software.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
That's why almost every Touchwiz custom ROM dev removes it. It sounds good in theory but doesn't do very much in reality. This is definitely not a reason to not try rooting, unless you are using it for business and actually need everything encrypted and overly safe.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Nickvanexel:
Hey can somebody help me with this issue with this phone?

In application manager apps that actually say 1.5gb total data are showing up as about 50mb(the size of the apk) and data shows only a few hundred kilobytes.

Also when using move to SD it is only litreally moving a few hundred kb. I know it's not the apps fault because with 2 other phones I was able to move the same damped apps in they're entirety to the SD card fully freeing up that space from internal as reflected in storage manager.

What is the bloody deal eh?

Thanks maybe.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
Probably need to do a Factory reset, but try wiping cache and dalvik cache in recovery first.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] B6000man:
what is as good or better than knox then?

The problem is a custom rom kills knox on the device for good, which might hurt the resale value of the phone for someone who is looking for that. I do want to pass through sensitive information on the phone that is why I was interested in knox. If I can root and forget about knox what is as good or better for security? Also I would like to hear if anyone was able to get the play store inside a knox container without the fees?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
What exactly are you worried about with security? I mean most of the important aspects of Knox can't be removed and are still present, but as for the Knox apps they are almost always removed. I have never had a problem with security on my phone and I have always removed Knox since it's inception. 95% of smartphone users probably don't know what the Knox counter even is. I personally wouldn't be worried about the resale value of a phone this old because it already doesn't go for much. Some people even pay more of the phone is already rooted. That's my 2 cents.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
This is mostly a informational post.

I used GT to unlock my first Sprint 720T long ago with a early version of GT. In the fullness of time, that phone eventually died. I bought a new replacement 720T for myself and another one for my wife. Both our phones are now on the latest OK3 firmware, rooted, but not unlocked.

Though I'm not leaving Sprint at this time, I want to unlock both phones for posterity and knowledge.

Here is what I've validated and learned so far:

On my first original 720T phone , I used SPCUtility.apk to get MSL, and this method no longer works on my newer 720Ts. This is probably do to my newer firmware (in this case OK3).

On my first original 720T phone, I simply started Galaxy Tools (GT), tapped Sim UICC Unlock, and my phone unlocked. I was never prompted for MSL code, but then GT could read my MSL on its own. I know this because GT used to display my MSL code in the upper left. With my newer OK3 720T phones, GT says MSL is unknown and cannot display the code anymore. Furthermore, when I tap Sim UICC Unlock now, I get prompted for a code.

Since my phones are not subsidized and paid for, I called Sprint and asked for my MSL codes. Sprint gave me the MSL codes for both of my phones.

I went back in GT and tapped Sim UICC Unlock. When code prompt came up, I entered my MSL code. GT will not accept the Sprint MSL code.

I called sprint back, and asked how do I use the code to unlock. Among other things such as turning data off tempoarily, they said I have to reprovision the phone to unlock and get MSL prompt.

At this point, I did not reprovision my phone, I ran out of time and hung up. I plan to pick up in the future where I left off.

In a nut shell, I believe the newer firmwares have increased the difficulty of unlocking.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Nickvanexel:
Does anybody else have this issue with the s4 l720t. Storage still will not detect correct app sizes, showing only they're apk sizes and maybe 200kb of data.... I assume it's because of this that I cannot truly move apps to external SD card, if it can't detect the data how could it move it?

I have now installed wickedx rom twice Wiping DatA, System, Internal Storage, cache, dalvick cache. Still have the same dammed issue....

Ps. Is there any rim that has ability to set external SD card as primary storage and install location?

Pps already tried pm set-install-location 2 using su command in adb shell. It does not do shot. Get command returns external as primary but the phone doesn't seem to give a ****.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
What I would do if I were you is to Odin the OK3 tar from www.sammobile.com theta gotta be something going on that isn't supposed to be.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Nickvanexel:
Thanks I broke down and tried cm ROM last night and it fixed the issue completely it seems.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Hasekbowstome:
bgmg, thank you for all of this compiled information.

I broke my last phone (it followed me into the pool) and am now using another Galaxy S4. I didn't realize it when I bought it, but it is the SPH-L720T, with the Sprint Spark, and I do get Spark service in some areas near my home, so I'm interested in keeping that service. I've spent the last couple hours googling, and couldn't find complete clarity on this, so I figured this was the place to ask.

I've already rooted the phone using CF-AutoRoot. If I flash on a stable cyanogenmod build (last stable jfltespr is CM12.1 from 2016-11-16), will I maintain Sprint Spark/LTE connectivity? If so, is there a benefit to updating my baseband version (currently NG5) beforehand?

As I said, I've done a lot of reading and haven't found anything definitive one way or the other. There are a LOT of older posts out there with conflicting information for the 720T. Some of them say flashing does work, but you will lose Spark, some of them don't care if they lose Spark because they're not in a coverage area anyways, some say that it will work but you just won't have the icon, and a hell of a lot of them just don't mention it one way or the other. I'm just looking for some sort of clarification here that I can upgrade to CM or SlimKat (only two I've used before) or something else without losing my Spark connectivity, if anyone could confirm.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Nickvanexel:
Just wanted to point out here ktoonez kernel found here:

http://xdaforums.com/showthread.php?t=2297379

Supports cm12(android 5.0.x) with CPU and gpu over clocking with voltage control and more is working on L720T ok3. For me so far.

In case anybody like me islooking for oc kernel for this phone and couldn't find one, like me.

With CPU oc to 2.1ghz on performance governor phone seems cooler than every other kernel I have tried on performance gov on stock frequency.

Thread says kernel only support i9505 though.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
Pretty sure that the Spark capabilites are only on Touchwiz.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Hasekbowstome:
Isn't Touchwiz just the Samsung stock UI? How would that impact data speeds when using a non-stock ROM? Wouldn't that also mean that moving the 720T to

any

non-stock ROM would result in loss of data speeds?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
In my experience yes, but I was simply talking about the fact that there really aren't any AOSP ROMs that are made specifically for the L720T, meaning they probably don't have the drivers for triband LTE.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Hasekbowstome:
Well that's a real bummer. :-/ Guess I won't bother. Thanks for the information!
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Sorry for late reply. On vacation out of state for a couple of weeks.

Thanks Bilgerryan again for helping out. I do concur with his reply.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Avan7:
Hi, which version of CM are you using? Or are you using it with stock OK3? ?

I visited the thread you mentioned, i have touchwiz 5.0.1 OK3, but i would install a stable CM ?. So would it work in my device? And if not, what rom are you using?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] EngineManShawn:
Not to get involved but why not use Wicked-X Rom for L720T. I got spark and everything else that I need. Just wondering?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bthorne79:
Spark does work on aosp Roms the l720t was merged in to the jfltespr trees long ago I have one and had no issues with it before I changed to different device we (Octos) have a spark tester and he gets his spark speeds also
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Added the below paragraph to the ROMS section if the op;

bthorne79 in post 3348 confirms "Spark does work on aosp Roms..." and "Octos has a spark tester and he gets his spark speeds also"
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
If I recall correctly, the one thing that does not work is WiFi calling. Someone correct me if I am wrong.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bthorne79:
You are correct that's built in to Samsung dialer frameworks and carrier provision
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Thanks. I know it is not important to everyone. However, it is important for me. Too many times with Sprint, I have been in a dead cell zone and only a WiFi signal available.

Let's face it, Sprint prices and speeds are nice, but they don't have the best coverage.

If your unlocked and on a bigger carrier (AT&T or Verizon) then it is not as important.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
ALL: Updated ROMs section of OP with some WiFi calling information.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] EngineManShawn:
Quick question!! If I freeze an application in Rom Toolbox and don't have any issues with how device operates (recommended application's) is it safe to uninstall?? Backed up of coarse and is a system App. Been frozen for months? Thanks
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] grabb0r:
L720T ROM reviews and testing

With any luck this link will pop up in the OP. YouTube user "Shark Jungle" tests and reviews a plethora of ROMs for the i9505 S4 - these are the ROMs which work on our L720T. I'm pretty sure he even has a triband himself. Guy is obviously not a native English speaker and his cadence is a bit slow, but he's totally understandable and his videos play beautifully at 1.5x speed.

https://www.youtube.com/channel/UC1agHh-E-wcmOtc25FN0cPg

He's VERY responsive to comments and questions posted on his videos. None of the "go read the 600 page XDA thread for answers" kind of responses you come to expect from XDA users - if you want to know which ROM has the best battery life, or if a specific ROM has a certain feature, just drop him a line and he very graciously takes the time to give a direct answer.

On the minus side, he doesn't provide external links to the ROMs - meaning you have to do a google search to find download sources. Or maybe it's just my umatrix settings preventing it. Anyway... SJ is an amazing resource regarding ROMs for our phone. AFAIK he hasn't reviewed WickedX or OctOS (the two which seem to be the most plugged in this thread) but I'm fairly certain he would if requested. Go check it out and give the guy thumbs up/subscriptions/whatever YouTube upvotes are; his work really deserves appreciation.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Thanks for the post. A long time ago I owned a AT&T S4. Again I may be wrong but I think all "i" series S4 phones (i9505, etc) are AT&T phones, and this is a SPH 720T thread (SPH-720T).

If I am correct and Shark-Jungle only tests ROMS on AT&T GS4s per your description, then I am not sure we want to add this to the OP.

I'm only a stock flasher and a locked SPRINT user so my experience is limited.

If anyone can enlighten me, I am listening, and love to learn more.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
i950x (i9500, i9505, i9507, etc) is the international version(s) of the S4. AT&T is the SGH-i337 and T-Mo is the M919.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] grabb0r:
The L720T is simply a sprint-branded i9505 with select firmware tweaks to allow "triband" functionality. What follows is a list of all the S4 model numbers to demonstrate the false diversity:

Samsung Galaxy S4 GT-I9500 (3G)

Samsung Galaxy S4 GT-I9505 (LTE)

Samsung Galaxy S4 GT-I9505G (Google Play Edition)

Samsung Galaxy S4 SCH-I545 (Verizon USA)

Samsung Galaxy S4 SPH-L720/L720T (Sprint CDMA)

Samsung Galaxy S4 SCH-R970 (USA, US Cellular)

Samsung Galaxy S4 SGH-M919/M919N (USA T-Mobile)

Samsung Galaxy S4 SGH-I337 (USA AT&T)

Samsung Galaxy S4 SCH-R970C (Cricket)

Samsung Galaxy S4 SCH-R970X (C Spire)

Samsung Galaxy S4 SGH-M919V (Canada)

Samsung Galaxy S4 SGH-I337M (Canada)

Samsung Galaxy S4 LTE-A SHV-E330S (SK Telecom)

Samsung Galaxy S4 LTE SHV-E300L (Korea)

Samsung Galaxy S4 LTE SHV-E300K (Korea)

Samsung Galaxy S4 LTE SHV-E300S (South Korea)

Samsung Galaxy S4 Duos GT-I9502 (China)

Samsung Galaxy S4 SCH-I959 (China Anycall)

Samsung Galaxy S4 TD-LTE GT-I9507

Samsung Galaxy S4 TD-LTE GT-I9507V (China)

Samsung Galaxy S4 SC-04E (Japan)

Obviously, these 21 flavors don't all have different hardware loadouts. Most variants mainly just handle different regional network types and bands. Hardware-wise there are only a handful of different versions due to things like dual SIM slots and Snapdragon vs. Exynos processor.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
Pretty sure there's a hardware component to the "triband functionality" otherwise I would be able to run L720T ROMs on my L720.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] grabb0r:
You can't run a 720T ROM on a 720 due to the fact that there are indeed some hardware differences... but insofar as the radio itself is concerned, it's only a matter of firmware which dictates which bands/networks can be connected to. Guarantee you that Samsung didn't develop 21 different types of physical (hardware) radio configurations to stick into the S4. If you open up both the phones you can compare identification markings and see they're the same radio.

The bummer is that the way devices are identified and catalogued, there isn't a way to simply flash the 720T firmware onto a 720 and have it function. Theoretically it *could* work, but the internal and network checks would be like, "Hey, device, you ain't legit" and the phone would be all "OH NOES!" and there would be much sadness as the phone simply pouts with a broken heart rather than being able to operate on additional basebands.

This is paraphrased and expanded, of course, but the gist of it is how a Samsung hardware technician explained it to me.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Thanks for jogging my memory. I had the i337 when I wad ATT, and now I remember that i9xxx are international versions.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
If we knew for sure that shark jungle does triband testing, then I think I would add this to OP. I also believe there are hardware differences between 720 and 720T.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Do we know if shark jungle tests tribands?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Plague_Bearer:
on my sph-l720t in galaxy tools it says "unknown" for the MSL key, so I am prompted for a key i don't have, trying to do a domestic unlock to use this phone on straight talk. I already downgraded the modem to mk5 and rooted with cf auto root, SSU.apk force closes on me too

EDIT: so I double checked and actually needed to update my galaxy tools, and then i was able to unlock the sim, now I just need to do a few extra things, for instance the APN settings page says its "Unable to view the access point name settings. Access is restricted for the current user profile."

I think I need to modify a GCF value somewhere too.. trying to figure it out
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] B6000man:
Well accessing financial sites and other personal information on the phone I would like the phone to be as secure as possible. I know that the knox kernal is permanently embedded on the phone, but if you trip knox the knox software on the OS cannot be used anymore. I think it is a great idea to split the phone workspace in two so I can do sensitive activities in the knox container, but the problem is that the play store cannot be had in the knox container unless you pay like $1 or 3$ month for it which is ridiculous. If anyone knows how to get the play store in there would be welcomed. I hardly doubt that there is a free solution to the problem so I would probably just root and install a custom rom anyway. Can anybody recommend the best rom for the l720t without compromise for like spark, up-to-date, and without the sprint bloat?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
Well my ROM, Wicked X, has all of that and is still being supported.

http://xdaforums.com/showthread.php?p=67279450
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Has anyone ever got galaxy tools v3.1.8 to work on stock OK3 firmware? . By "work", I mean fully installed and able to access the main menu.

I have only been able to get v3.1.7 to work on OK3 stock, and it can't read MSL.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bilgerryan:
You have to be on Pre KitKat firmware to get your MSL that way, as far as I know.