yashsingh1/xdaforums huggingface dataset:
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
OK I did a full unroot in supersu (I'm up to my neck in water now lol)

Now if I could just get the update to start...ugh!
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] td030981:
The way I found to get the update notification back is to go to settings and do the system update. You should be able to access it from there. If it's not downloaded you can make it redownload it from there.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] frukyyy:
Root will not allow OTA because it will lock the access to system.

If you wait I will try to get a 4.4.3 720T by tomorrow and Ill try the Towelroot.

Because if Towelroot it doesn't work the only way you can get root is to trip the counter.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Thanks, But I want to try anyway. I've already unrooted and am willing to take the risk.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
That's not working for me. Please take a look at post 589.

Also, I remembered I saved a copy of the stock update file on my phone a long time ago in my own folder ( 0de568e284baa2bbcb25305b099be7cc415386de.USER_L720T_SPT_MK5_to_NAF_Update_FWD.zip)

Is there a way I can use this to start upgrade?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] td030981:
That's it. You will have to go to recovery and then install update zip

---------- Post added at 05:17 AM ---------- Previous post was at 05:07 AM ----------

Hmm..... yeah my bad. I missed that post. And I see that the update is huge. Wow 400+ mb. The update to NC6 is only 36mb. I have it and the NAF on my computer.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Fractur:
Spriint GS4 PUBNC6 Towelroot failure

As the title suggests, towelroot failed on my Spring Samsung Galaxy S4 with PUBNC6.

Tried twice.

Fr
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Did you try the mod string?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] frukyyy:
Towelroot confirmed on 720t

Towelroot confirmed on 720t

DON'T THANK ME

ALL CREDITS GOES GEOHOT
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Thanks, are the Knox flags un-tripped 0x0 ?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Confirmed again! Used system recovery to upgrade to naf 4.4.1, then installed update to nc6 4.4.2, then ran towelroot from my sd card and applied mod string 1337 0 1 7380 4 0

And poof I got root :)

Reinstalled supersu app, ran the supersu app, and chose Normal method of installing bin file, and it failed (this worried me a little). Thought I was going to have to install it with twrp and maybe the Knox flag would trip or something....well I didn't do anything but reboot one more time and now supersu is working perfectly and all flags are intact except custom.

All knox flags are 0x0
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] JerryGNYC:
Thanks, but I wasn't waiting... I rerooted with CF Auto-Root after updating to NC6. :eek: :cool:

KNOX? I don't care 'bout no stupid KNOX! :p

---------- Post added at 10:42 AM ---------- Previous post was at 10:36 AM ----------

Welcome back to Rootland :cool: :good:
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Thanks. It's good to be back :)
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
All,

Post one updated (towelroot section again)

P.S. I'm making some progress on native tether. I hope to have a stable solution soon.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] daniel4653:
Just so everyone knows. Once you install a custom recovery or kernel Knox flag WILL trip.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Not sure if this has anything to do with towelroot but about the time upgraded to kit Kat and converted to towelroot my signal seems to be stuck at only one bar and LTE speed had been greatly reduced. (Maybe sprint is doing some work on the towers and everything will fix itself I hope). Any ideas?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Sure wish this xda app would let me delete a post when I mess up.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Update...my signal and speed has increased on its own. Pretty sure sprint is playing with the towers in my area. No complaints here. Loving towelroot and my gs4 phone :)
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bigbigtex:
Are there any reports of successful unlocks on the L720T / baseband ending in NC6 / 4.4.2 to function on other carriers in the US? All I can find is "no".

Thanks!
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] obie992:
I also want to unlock L720T for international use, can you help me with that?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
There are no reports of successful unlocks that we know of for the 720T. When there are, I will put it on the OP(Post one).
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] obie992:
Me too, If you have any update regarding this, please let me know
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] MyzDevyneOne:
Update: towelroot v3 worked to root my 720t & my Samsung Galaxy Tab 3!!! ? ::joy::
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
All,

Just cleaned up several sections of the OP. The most notable change is the addtion of a paragraph to the end of the ROMs section which says: "Additionally, the spark boot graphic was removed by Sprint in stock KitKat NC6. I noticed this recently when I upgraded from stock 4.3 to stock 4.4.2"
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] JerryGNYC:
Funny, I still have the Spark boot graphic on NC6... :confused:
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] frukyyy:
NC6 is only a minimal modem upgrade to allow WiFi calling it doesn't affect the BL. But maybe the OS Android upgrade from 4.3 to 4.4 removed the spark BL.

I cant tell because I removed Sprint crap long time ago.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] td030981:
I still have mine as well. So yeah that is weird. So what do you have now. Your yellow screen is gone?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Hmmm. I'm on stock NC6 rooted with towel root and the following xposed modules:

Clean notify, Wanam, and Greenify

When I boot, first I get the samsung galaxy s4 logo then I get a new screen that just says samsung with a circle being drawn around it while making a cool swoosh sound. Thats it. After that it goes to my lock screen.

I wander if towelroot removed the graphic somehow similiar to flashing roms?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Just modified the OP to read "... Additionally, I lost the spark boot graphic when I upgraded from stock 4.3 to stock 4.4.2 KitKat NC6 and used towelroot. I am not sure if towelroot is what caused me to lose the sparc graphic. If some other stock NC6 users with towelroot and cf-root would post confirmations on their spark boot graphic, it would help greatly. "
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] frukyyy:
My yellow screens are not "gone" I removed them intentionally.

Some sprint settings including sparks can be restored via market apk refresh customizationhttps://play.google.com/store/apps/details?id=com.samsung.refreshDevice made by Samsung specifically to address this issue; since some GS4 sprint users lost sprint startup bloat ware.

My question is why would you want it back?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] td030981:
Lol sorry frukyyy, I should have specified. That post was meant for bgmg. And changing the boot img. is cool with me, I was just curious to what could have happened to bgmg boot since we are running the same update.

---------- Post added at 10:28 PM ---------- Previous post was at 10:26 PM ----------

And thanks for the info about sprint frukyyy.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
td030981 and frukyyy,

Before I decide not to worry about losing the spark graphic, I'd like to understand what removed it and why. I hope you can help me figure it out.

Td030981,

I assume you are stock nc6 with cf-root. Is that correct?

Frukyyy,

Will the market refresh get rid of my root (until I root again) or will it just restore the graphic without losing root?

ALL,

Do any of you think it's possible I could have frozen a startup bloatware that turned off the spark boot graphic?

Those are all the questions I can think of for now. If anyone can think of something else that may help me figure it out, please let me know?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] 31ken31:
Anyone having issues with mobile odin pro on this device? When I open the app its not compatible and asks to make a log and not to if I wanted a refund. Really strange
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] frukyyy:
It's KK upgrade that's causing the sprint customization to get messed up. Why and how no one seems to know.

You shouldn't lose root with the apk since it can be run even in AOSP but I'm not sure.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Same thing happens to me on mobile odin. I asked the maker to modify to support our 720T's. No answer yet.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Thanks ftukyyy. You are a big help. Been reading. This sounds like it is exactly what I need. I'm little scared because at least two people said it erased everything and reset their phone back to day one...yet others said they lost nothing.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Ok, I downloaded and ran the refresh apk from the play store. It has two steps and doesn't say what the difference is between them or whether you should always run both...I only ran step one. It went through a series of boots and (for whatever it's worth) it restored my spark boot graphic on the last reboot... so thanks ☺

I did not lose anything by running step one, and again I have no idea what happens on step two. I'm going to add this to the first post.

I wander if this would work on a flashed rom and would restore the spark boot graphic.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
All,

I added a miscellaneous (MISC) section to the OP and gave shadowswittness and frukyyy some kudos.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] td030981:
That's correct bgmg. Stock nc6 with cf-roor
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Just curious. . How exactly did you purposely remove your yellow screens? Is there something easy you can turn off and on or freeze and defrost? Or did you just flash a rom?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] frukyyy:
I have custom ROM. Still you can change bootanimation.zip in any ROM if you have root access.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] td030981:
^^^^^^^ true
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] Daisflaque:
Not completly without help.. ;)

So I've been busting my bottom on our triband varient..

I've obtained a working Odin for stock 4.4.2 NC6 (No root yet) And I'm working on a rooted stock Odin.. eta... ehh 48-72hrs.

I've made tutorials for rooting and putting recoverys/roms on it. I have tested sparks capabilities on several AOSP roms. Have even posted a screenshot of speedtest.net and the 58MBPS download speeds. Post #6.. spark-not-lost-guys.

I have made a pic by pic tutorial on flashing a recovery and or rom for our device.. here.. flash-custom-recovery-rom-720-720t.

I have been hosting the latest Odin .tar for the 4.4.2 NC6 update stock NOT ROOTED.

And I am not far away from finishing a rooted stock Odin tar.. Here... L720t-4-4-2-odin-return-stock-without-root.

I even made a 'low quality' 3 part video root tutorial for our device.. found on YouTube and full tutorial at... video-root-tutorial-l720t-l720-sprint..

Other than all this I am currently making a complete 'return to stock' flashable zip for all those TW lovers everywhere..

To be completely honest. I am no developer.. (although I am hoping to start the long haul of becoming one.)

I created a few themes and made them CWM/TWRP flashable.. and I have loads of SQL, Java and C++ programming skills.

Second I am a father of three and own a PC repair Business. So I am very busy during days.. so I utilize my nights.. and the lack of sleep can catch up quick.. I'm sure you all can relate.. :p.

I am open to a mutual hangouts where we can all congregate and put our two cents in.. lol lend some knowledge.. XD

Either send a private message to me with your email so I can add ya or look at post number 5 here... L720t-4-4-2-odin-return-stock-.

I could always use some help on this.. I feel like I might be the first and or only one to plug this bad boy into adb and start pulling partitions and making progress for us all.. ;)

Probably completely wrong there.. :p

---------- Post added at 10:51 AM ---------- Previous post was at 10:23 AM ----------

I have been taking, categorizing and preparing Screenshots of my 'Settings.apk/About Phone' info while swapping Roms. Because of the lack of reports in tested roms. So soon I'll post a very in-depth list of..

1. Screenies for as many different custom Roms as I can..

2. Screenies for different combinations of Kernels and Roms..

3. Any tips/fixes for a specific feature/issue I've encountered.. whilst on said Rom/Kernel.

Thx guys. :)
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] carolinavenger:
^^^dude! You are the MAN. that is awesome.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] goodbye hppalm:
No spark graphic after Odin nc6
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] mocoyombiflash:
Need modems

Anyone has nc6 modem or naf modem
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
If you want the spark graphic back, take a new look at post 1 in the misc section
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
I have little experience with custom recoveries and nandroid backups. Can someone please tell me if this is a true statment: I assume if I did a nandroid backup of my stock system, and then at some point in the future restored it (which I believe is a custom recovery process), it would trip the knox flag and it doesn't matter that is a stock backup image. Is that correct?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] mocoyombiflash:
need help

can someone send me a picture of their serial no file? mine is all zero out
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] td030981:
Bgmg once u install a rom the custom flag will be tripped and a restore will not put it back to normal. Once tripped I think it will remain tripped.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Thanks. Are you saying that restoring a nandroid backup is the same as installing a rom?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] td030981:
No. Not sure bout th that bgmg. But if u do a custom rom. There is no turning back. Not that I know of. I was assuming that what u meant. Why would u do a nandroid on top of stock. That's useful for when u install a rom that u don't like. I have had to go back a few times lol. I'm back stock now. NC6
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
I was thinking that a nandroid backup is like having a full device image backup for backup protection in case I ever corrupt something or mess up my phone to much... And if so, I thought I'd would be good to have one.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] td030981:
Bgmg that is correct. It will restore if u mess up anything or if u get a rom that u don't care for. It saves everything. Text messages, pictures, games and data, system stuff. Everything
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
OK thanks. I guess that still leaves my question open: If I do a nandroid backup of my stock system, and then at some point in the future restored it, would it trip the knox flag? I also try to post this question in a nandroid forum. If I get an answer, I'll let everyone know here.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] mfr213:
Bgmg,

Once the boot process detects a non-standard boot process, the KNOX bit is set.

It is a one-time programmable bit in e-fuse, which can only be turned from “0” to “1” (i.e. burned). If a non-KNOX boot loader or kernel has been put on the device, KNOX can no longer guarantee the security of the KNOX container. As a result, this KNOX bit will be burned to “1”, indicating that this device can no longer use the KNOX container service.

So restoring an standard original backup cannot un-set the KNOX bit.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] daniel4653:
There are some users who reported having tripped Knox. Then took the gs4 to their provider for insurance repair. So they accepted it with Knox flagged, shipped it to Samsung, and when they received the phone back it was the same one with Knox flag back at 0x0. Indicating that Samsung has some way of resetting the counter.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Thanks. I know that the knox flag cannot be unset. What I want to know is: If I do a nandroid backup of my stock system, and then at some point in the future restored my STOCK nandroid backup, would the knox flag change to 0x1?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] mfr213:
Bgmg,

If you use a custom recovery to make the NANDROID backup, then you have tripped KNOX when the custom recovery was installed. I've seen an app to make NANDROIDs with only root and no custom recovery, but haven't seen a way to restore the complete NANDROID image without a custom recovery installed (and thus KNOX is tripped).
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
OK thanks. That's what I wanted to know.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] intron1:
This thread has been great! Thanks so much to everyone that is contributing. I got a T as an insurance replacement. I had no idea what "spark" meant but figured it was just some clever marketing ploy. Luckily, I rooted with CF and got lucky :) I noticed my phone had this funny modem number that none of my old roms worked with. And then I found this thread. What a lifesaver!

Quck question that I probably already know the answer to. I am rooted, with the xposed framework up and running. One tweak that I miss on my old GS4 was 4x5 grid (4 wide x 5 high) on the launcher and a modification that moved the little indicator dots on the dock bar (do they have a name) to the very bottom of the screen to free up room. Does anyone have a way to modify the icon grid that works without a custom rom? I am up for some mild modification to system files if someone knows what to modify and it only requires text changes. I ain't skeered.

:)
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] frukyyy:
Apply same module and it should work if it is up to date with KK.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Has anyone frozen the "Samsung DM Service"? Trying to find out if its safe to freeze it. I'm reading conflicting things on Google and some articles sound like they may be talking about a different service called adm.

And for anyone looking for a sprint gs4 freeze list, here is one I found: Safe to Remove Applications" for our Sprint GS4's List!
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] XavierBK:
I'm having some trouble rooting my 720T. It is running 4.4.1 with the L720TVPUBNAF baseband/booatloader. I've tried CF Auto Root, towelroot, and Safe Root with no luck.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Did you try v3 of towelroot with the Samsung mod string? The modstring is critical.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] XavierBK:
I did. It will say it was successful but when I try to verify with Root Checker it confirms that I do not have root.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Hmm... I'f towelroot did not reboot your phone, it sounds like you may actually have root. I'm not real familiar with root checker. Do you have supersu app installed? and if so, check your supersu allowed list and see if root checker is denied (I'm not sure if that would prevent rootchecker from working, it's just a guess). Also try installing cpu-z from play store and let me know if cpu-z says you have root.

If you are not familiar with cpu-z, it will tell you on the system tab if you have root. Here's a picture from mine.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] XavierBK:
Hmm, it would appear I did have root. My experience with prior devices had the auto roots install Super SU so I didn't even think of doing that myself. :silly:
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
OK good. Glad you figured it out. I think I'll rewrite the op to make sure users know that towelroot does not autoinstall supersu.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Made mild updates to the following sections in the op:

ROOTING, HOTSPOT, & MISC
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Updated OP rooting section yet again.

Added subsection called "ROOT METHODS NOT YET CONFIRMED ON 720T" under ROOTING section with some new information.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] andypiznti:
Thanks

This is awesome, thanks for posting it! on that note, is there a number i can use through the dialer to get to the apns? on my old android photon, if i dialed something like *#*#4141*#*# it would open the apn settings. I'm on aicp and there is no way to change the apns anymore. thanks again!
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
I don't know what aicp is, and I believe there is a dial code, but I don't know what it is. I did however find this thread which may help. Take a look at post 4 and 6.

http://xdaforums.com/showthread.php?t=2385963
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
I've read that you can change build.prop to modify the grid size.

Default:

ro.sf.lcd_density=160

Try changing it to:

ro.sf.lcd_density=480
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] andypiznti:
Thanks dude!!! I havent tried this but i will when i get home. i did find the number i was looking for, and it does work on this phone too. i dont know if it actual changes the apn but it does switch the connection. I cant connect to LTE right now which is why im searching for it, and even after messing with them i still couldnt connect (I did get 3g tho). in case anyone was wondering, the number is *#*#4636#*#*, type that in the phone dialer. Thanks again!
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Your welcome and good luck.

Hmmmm..I tried typing *#*#4636#*#* into my dialer and nothing happens.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] klabit87:
Has anybody posted a system dump? If not I hope to get one done on the latest update in the next day or two.

I also hope to create a deodexed stock rom also.

Just looking to learn as I go along.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bthorne79:
Yes but thanks cnexus made me a stock rooted zip of mk5
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] klabit87:
Ok good. I was going to do it for a friend of mine.

I guess he didn't realize there is already one either.

Also could i get a link to the stock rooted mk5 zip please?

Thanks.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bthorne79:
http://cnexus.co/downloads/files/Misc/SPH-L720T_ROOTED_ODEXED_MK5.zip here ya go
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] 31ken31:
Does anyone have any experience with Samsung warranty dept? I changed my glass and fubared the digitizer ribbon. Phone boots and shows screen perfectly just no touch response. Looks like new. Any idea if they will fix it?
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] elmy2424:
Hi, anyone know if its possible to sim unlock this s4? i mean it was made capable to work on gsm networks?do you know about someone who have thir 720t sim unlocked form sprint.? have someone tried those other sim unlock method for other S4´s?.
[Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot] bgmg:
Sorry, for now this is not possible on the 720T. If anyone reports an unlock success on this thread, I will update the OP.