yashsingh1/xdaforums huggingface dataset:
[Sprint Samsung Galaxy S 4 General] Chevyblood561:
Yes ur sprint sim will still work after doing the unlock. When switching between Sims all u have to do is (sprint sim in) under mobile networks select LTE/CDMA phone should restart Profit. For (T-mobile sim in) under mobile networks select GSM/UMTS and all should be good.

---------- Post added at 07:51 PM ---------- Previous post was at 07:50 PM ----------

Yes ur sprint sim will still work after doing the unlock. When switching between Sims all u have to do is (sprint sim in) under mobile networks select LTE/CDMA phone should restart Profit. For (T-mobile sim in) under mobile networks select GSM/UMTS and all should be good.
[Sprint Samsung Galaxy S 4 General] elpesao23:
iBowToAndroid,es0tericcha0s .i register the IMEI with metropcs and the phone is working 100% thanks guys
[Sprint Samsung Galaxy S 4 General] kinubic:
hello i cant seem to get to the UTMS menu~ or when i press 1 or 2 nothing happens~

trying to unlock my friends sprint ~ am i missing something here?~

hes on stock sprint rom~
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
Read the thread. OP is out of date
[Sprint Samsung Galaxy S 4 General] kinubic:
is there an updated version actually got it to work all the way

just apc settings remain~

tried my ATT simcard~ still no dice
[Sprint Samsung Galaxy S 4 General] es0tericcha0s:
Which build version of the software are you on? And L720 or L720T? I've unlocked at least a dozen of these and have never had issues with selecting stuff in the Hidden Menu.
[Sprint Samsung Galaxy S 4 General] fun4:
how to revert to stock setting?? Thank you!
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
If you're referring to returning to Sprint configuration, dial ##72786# in the dialer
[Sprint Samsung Galaxy S 4 General] Dozenboy0012:
hey glad to see this is still alive, so I did it after a battle so it's now unrooted I have T mobile on there now but it has a update ready to go and I'm sure it will mess things up plus I did this for my girl and she is out of touch with tech so where do I go from here do I put a t mobile rom here now and do I root it as a t mobile phone, just a lil lost cuz I do want to root and get rid of sprint bloatware I'd like to keep touchwiz also plz be detail thanks in advance to the right help
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
You're really the only one who can answer that question...

Personally I would say doing a ROM is easier than manually deleting a bunch of Sprint bloat.. Plus it will get rid of the splash screen, OTA nag, HFA nag, etc..
[Sprint Samsung Galaxy S 4 General] bthorne79:
OK I went through this whole thread and followed all steps. I was able to get to all menus and change everything the way its supposed to be for unlocking Sim when I put my T-Mobile Sim or my Att Sim I get invalid Sim still really stumped about this I've been at it for days now any help please sph-l720t I've tried on all modems mk5 to ng5
[Sprint Samsung Galaxy S 4 General] bthorne79:
Even sim info shows still locked
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
MK5 modem is the only one that will work. That "lock status" in the Service Menu means nothing
[Sprint Samsung Galaxy S 4 General] bthorne79:
I'll try again any full updated steps to do this other than flipping through 100 pages
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
Don't need to read 100. Just read starting at the beginning of February
[Sprint Samsung Galaxy S 4 General] bthorne79:
Ok so I finally got it to work Odin nc6 tar with mk5 modem which borks WiFi (of course) followed steps that was quoted from post 1399. I think that was the post but I always had issues with the mk5 modem that's why I never stuck with it. Is there any way to upgrade modem and have the unlock stick and what modems.

BTW thanks for this thread and everyone who has spent so much time figuring this out
[Sprint Samsung Galaxy S 4 General] Chevyblood561:
Yes u can update to the latest modem and have no issues.
[Sprint Samsung Galaxy S 4 General] bthorne79:
OK so I can take it to NG5 or OA3 cool I'll try that also but one thing I'm only getting edge which is just a total pain did I miss something

:Edit:

So I've tried all the modems for the Spark S4 (L720T) and the only one that does not give invalid sim card is the MK5(4.3).

I've Odin every firmware and every modem combination possible. Even did all the unlock steps even though the unlock stuck through all the flashing and tried a few different ROMs stock and Aosp/CM based. It seems that MK5 modem is the only one I can use.

Next thing is can someone please help with the Edge only network on the S4

I have a S3 on T-Mobile (t999l) and I made sure all network and apns are exact
[Sprint Samsung Galaxy S 4 General] iIsiDev:
Help With My SPH-L520

Hi guys, its posible unlock my s4 mini sprint to gsm - Please can someone helpme to do it? Thanks for the help :)

This is my phone - and i'm trying to unlock for use in GSM NETWORKS like AT&T T-MOBILE CLARO...

Thanks​
[Sprint Samsung Galaxy S 4 General] bthorne79:
Most likely the same way
[Sprint Samsung Galaxy S 4 General] chapa310:
First of all I want to say thank you for this thread. I successfully sim unlocked my sprint s4(SPH-L720) for domestic use on T-mobile. Phone had stock ROM before I started process. Baseband on phone is MDC Version 4.2.2. I followed every step on guide.The only problem i have is phone wont connect to wifi. Problem started after I did International unlock. Phone just wouldnt connect to wifi. Every time i try to connect to wifi it says "the device has detected an application attemting unpermitted actions and has stopped loading". Plese help fix this issue. Thank you in advance. I searched the forum but no luck finding a solution :(

2.)Another thing I would like to know is if i can install a T-mobile rom or any other rom on phone and still keep unlock. Or anyone can recommend a good rom that i can use. Thank you once again.
[Sprint Samsung Galaxy S 4 General] genica:
Make sure you didn't accidentally turn off INTEGRITY CONTROL in the service menus.

Also... In the band selection should be set to automatic. That should help you with your edge issue
[Sprint Samsung Galaxy S 4 General] bthorne79:
No I figured it out the tower by my house is down and tmo is taking there sweet time to fix they have already given me 5 free days for the failure on there part
[Sprint Samsung Galaxy S 4 General] tonylmiller:
Need to recover Sprint Galaxy S4 on 4.4.2

I tried to use the one-click method, but it did not work on my phone.

Now my phone will not boot. It has the "Firmware upgrade encountered an issue." message.

I have downloaded Odin 3.09.

Can someone point me to a firmware image that will get my phone going again?

I can get back up on a Sprint ROM, or preferably an unlocked state that will allow the phone to be used on T-Mobile.

Thanks for any and all help!

Tony
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
Search the forum. Very easy to find. Or use SamMobile
[Sprint Samsung Galaxy S 4 General] tonylmiller:
Sorry, I should have stated that I have already searched and found a wealth of confusing information. What I am looking for is clarity.

However, I was able to install ODIN and find a Sprint ROM for my device. I now have it working on Sprint, at least. I still do not know how to get it working on T-Mobile. I think I will just sell it as a Sprint device.
[Sprint Samsung Galaxy S 4 General] OZBeatz:
Thanks To Everyone Supporting GS4!

I have the Tri-Band Sph-l720t, I have my sim unlock to T-Mobile HSPA+. My data speed is very close to 4G. One thing I like, is I can use my Internet while talking OTP!(Sprint didn't allow that)

First I did have problems with data only getting edge speed. My solution was starting all over, restoring my phone to stock and following directions.

I had to play with a few other settings and T-Mobile APNs

Now my phone is unlocked to T-Mobile, with data speeds sometimes better than Sprint LTE!

(Even I'm on HSPA+, I still only get a 3G sign, but it doesn't matter)
[Sprint Samsung Galaxy S 4 General] jjjooonnn:
SIM unlocked for ATT only?

I haven't seen anyone with this problem, but I hope someone can help!

Baseband

L720VPUAMDC

Kernel

3.4.0-481102

dpi@SWDD5908 #1

Tue Jan 28 22:01:38 2014

Rom

Stock Touchwiz

Flashed NAE stock (via Odin 3.07)

Flashed CF root

Flashed MDC modem

Did international unlock (S4 Flasher)

Followed guide until APN shortcut (MNC port wipes settings)

Flash NAE modem

The sprint activation is still attempting to connect but no signal -who knew!

I checked the ESN on swappa and it appears clean.

*Now the problem: The phone can only read an ATT sim (no invalid sim msg, ICCID is read).

I bought a unactivated T-Mobile nano sim (with micro adaptor): nothing - Tried the one I use in my Nexus 5: nothing.

Does anyone know what's going on?

My Nexus 5 has started bricking (5.1 or bad memory(?) ), and I'm really in a pinch here!

Any help is appreciated -plus it's my birthday :cowboy:

:crying:

PS: if anyone's having the bricking issue w/N5 try sticking it in the fridge overnight then turn on: worked twice so far but not much hope
[Sprint Samsung Galaxy S 4 General] OZBeatz:
MDC

For T-Mobile, far as I read, MDC modem will only work for domestic use.
[Sprint Samsung Galaxy S 4 General] jjjooonnn:
I've tried MDC,MD9, NG2, NAE you name it. None are recognizing my t-mobile sims

No prob with international unlock but I did both DM over UART & DM/DUN over HSIC with *#9090# -just incase.

Tried resetting via 786 and 72786.

Maybe something worth mentioning, under BIP Blocking I have: NV(5770): 1

Network mode under mobile networks has no WCDMA option, and no roaming options.

I'm thinking maybe something related data in the rom?

Is it possible to install cmw/twrp and flash a stock rom -without causing damage?
[Sprint Samsung Galaxy S 4 General] jjjooonnn:
[MENTION=6591882]OZBeatz[/MENTION] Post #1435

I think you might want to pull that image, your phone id info could be stolen/flashed to a stolen phone.

BTW What ROM version are you on?
[Sprint Samsung Galaxy S 4 General] OZBeatz:
Thanks for the heads up.

Right now I'm stock, since I can't have a lollipop rom, I'm still looking for a good one to use.

One thing I notice, the rom will have to match/based on the android version capable that's of reading domestic sims.

For me it's 4.4.2 or lower, any rom based on a higher version gave me different problems.
[Sprint Samsung Galaxy S 4 General] churchey360:
Please help me... Once we finish the 11th step can you flash a tmobile ROM and use a tmobile sim card? Instead of changing build.prop and adding apns.. Also will a factory reset before flashing a new ROM mess anything up?
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
1. The OP is outdated - as far as the international unlock steps go. Domestic unlock steps (Service Menu) remain the same.

2. You should be able to, although I would consult with the dev or users who have tried it to see if anyone's had success flashing it on a Sprint device

3. Factory reset will most likely not ruin anything, but not guaranteed. At best, you'd have to put it in GSM mode again. At worst, you'd have to redo the Service Menu steps

---------- Post added at 01:27 PM ---------- Previous post was at 01:20 PM ----------

1. Modem downgrade is not necessary. Don't touch it.

2. Don't touch anything in *#0808#, *#9090#, or ##3424# - not needed.

3. First make sure the phone isn't blacklisted.

4. Then Odin back to the latest stock tar

5. Then run an RTN (##786#).

6. Then repeat the unlock process (ignore the international unlock process posted in the OP. Much easier one-click method available).

Has nothing to do with the ROM. It's the modem. If you have the T version, there's only 1 modem that will work.
[Sprint Samsung Galaxy S 4 General] jjjooonnn:
Thank you for the response, I wanted to be sure it was hardware before reporting back.

Turns out the sim card reader was busted.

$10 bucks and a few screws later, it worked like a charm.

Thanks for all the help!
[Sprint Samsung Galaxy S 4 General] driz:
l720t woes

Hello all. I have a client who purchased a Sprint Galaxy S4 L720T from craigslist. She intended to use a t-mobile SIM card on it and you can imagine how the whole process kicked off. When the phone eventually made it to me, my first determination was that the phone was likely stolen as it still had active sprint service from the previous owner. The fact that my client was unable to contact the seller further confirmed this.

be that as it may, the phone arrived on factory stock OA3. Here are the steps i followed:

1. Install TWRP and flash SuperSU

2. utilize Odin v3.09 to downgrade the modem to MK5.

3. adb shell -> su -> am broadcast -a android.provider.Telephony.SECRET_CODE -d android_secret_code://27663368378

3a. On the device i selected UMTS followed by [1] debug screen -> [8] phone control -> [7] network control -> [1] gcf -> [1]GSM/(E)GPRS/WCDMA REL8

4. Reboot device

5. Enter Mobile settings and choose GSM for mobile service.

After completing this, i had 3G Data, MMS, and voice service.... for a day. Now I have a red x on the signal. It no longer tells me invalid sim, but i get no signal. My thought was that perhaps a sprint update pushed through (since it was still a sprint rom) blocking SIM functionality after the ESN went bad? i stay away from CDMA phones so I dont have enough experience.

Since the issue, i tried repeating all steps, tried flashing a custom rom with no sprint stuff, all result in the same behavior (although, flashing the google play edition gave me bars which excited , but it turns out it was a "provisioning service" for spring activation.

thanks in advance for any assistance!
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
Original owner probably reported it lost/stolen
[Sprint Samsung Galaxy S 4 General] driz:
that was my thought aswell, but then i wonder, how does that work. They call spring report it stolen, but the device was operating on Tmobile with the sprint service disabled. lets say an update through the sprint rom did this, wouldn't putting a custom rom lacking spring items circumvent this?

honestly, i dont know why people buy phones from craigslist to begin with.. but that's another point of discussion i suppose.
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
All US carriers subscribe to the same blacklist. A blacklisted phone won't work on any US carriers, period.

...unless you can fix it...
[Sprint Samsung Galaxy S 4 General] eric303:
I did everything as stated, but when i put in a AT&T sim it says invalid sim card, does anyone know which step i went wrong?
[Sprint Samsung Galaxy S 4 General] driz:
Does your baseband show mk5?

Disregard me, I am on 720t
[Sprint Samsung Galaxy S 4 General] eric303:
I'm on the MDC, also when i do the buildprop, do i put the code in property name or property key? or both?
[Sprint Samsung Galaxy S 4 General] eric303:
If i get signal but when i make a phone call it ends the call right away, does anyone know what is wrong? I went through the secret menu and made sure it was GSM WCDMA ONLY

inside the phone it shows NETWORK as ATT (i got a ATT card in it), mobile network type is unknown, service state is out of service, but my phone number shows up correctly under phone number

let it sit for like 5 min, now the signal is gone, and has an x over it
[Sprint Samsung Galaxy S 4 General] nickkeslar:
having trouble

I have the l720t model and i i flashed twrp, supersu, flashed MK5 but i still cannot access the secret menu. It tells me menu does not exist. Does anyone have any suggestion? I thought the secret menu was brought up *#0011#. I didnt have a computer to use so i tried the other way through terminal emulator and got nothing. Im confused and would like to get the unlock finished
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
*#0011# is only the first step...
[Sprint Samsung Galaxy S 4 General] nickkeslar:
then after, i hit menu>back>menu>key input>1 and wait and get nothing. I have also tried number 2 but to no avail. I was reading and sasw to enter "Q" but i havent tried it yet. Do you happen to know which post has the correct directions? I have read back to february but still see several different variations of the directions and am not sure what is right
[Sprint Samsung Galaxy S 4 General] es0tericcha0s:
Dial *#0011#

Menu > Back

Menu > Key Input > Q

Menu > Key Input > 0

Wait about 5 - 10 seconds and Hidden Menu should pop up

It is very glitchy and sometimes seems like it isn't working. Just give it some time in between key inputs to make sure if it is working and just laggy or not. I've unlocked many of these phones and it always works on JB and KK stock roms.
[Sprint Samsung Galaxy S 4 General] mynameistory:
So close!

Okay, I've gotten very close on this. Thanks to imbmiller and iBowtoAndroid for all the help so far.

I ODIN'd back to the stock NG2.

Then ran root.

Did an RTN.

Downloaded build.prop editor.

Did the SSU.apk unlock (this didn't work when I tried before on a custom ROM).

Ran the service menu and followed all the directions. Rebooted.

Entered into build.prop editor-

Property name: ril.sales_code

Property value: LOL

Property name: ro.csc.sales_code

Property value: LOL

Rebooted.

Entered APN values manually, seems like the launcher no longer allows shortcuts.

Now, here's where I have a problem. There is no menu for Roaming options, so I cannot check to allow roaming.

I rebooted just to see if it would work, but no luck yet.

iBowtoAndroid, it seems that you said I wouldn't have to downgrade in order to fulfill these steps. Can you comment on this? And, is this the problem, or am I missing something else?

Thanks for the help,
[Sprint Samsung Galaxy S 4 General] mynameistory:
Well, I finally figured this out thanks to doing a bunch of reading on this thread and others, and thanks to helpful hinters here and elsewhere.

I read this thread and changed my band selection to ALL GSM, it seems that the phone will only accept one entry. Dicking with the LTE band selection undid the GSM preference.

"Follow the rest of the directions from the above link, setting all the settings to what is stated. EXCEPT where he says to set all the preferences to WCDMA ALL, GSM ALL and LTE ALL. When I selected one, however, an asterisk appeared after my selection leading me to believe that you can only select one of these and so I set mine to GSM ALL and left the others alone. This worked for me, so I thought I'd mention it."

I've also tried selecting LTE/GSM Mode only, as well as selecting Band 2/1900 to try to get LTE, and played with switching the APN from epc.tmobile.com to fast.tmobile.com. I've managed to receive 3G on a few occasions, but I can't determine the criteria for why it works sometimes. Mostly, I seem to receive 2G Edge, signified by the capital "E".

ANyway, I'm happy to have service (even if it's slow). I'm upgrading to the G4 when it comes out. Thanks to all the help on this thread!
[Sprint Samsung Galaxy S 4 General] mynameistory:
One more time.

I found out why I was unable to get H+ on my phone!

Here:

After selecting [1] UMTS-GSM in acquisition order, it somehow kept reverting back to GSM-UMTS, as if I had selected choice [2].

It seems as though the menu selections are titled incorrectly!

When I selected [2]GSM-UMTS, it said [1] UMTS-GSM selected. There's a mix-up in the menu!

Then I selected WCDMA ALL in the band selection, and instantly picked up H+.

Look for this little goof-up during your menu selections!

Good luck,
[Sprint Samsung Galaxy S 4 General] eric303:
does anyone have a link to the 720t MK5 modem?
[Sprint Samsung Galaxy S 4 General] bthorne79:
https://mega.co.nz/#!RF9ljTIb!ULaO8Gc2oz8tTNGpUeYqs0qeNjzU73JeBLcJg9m9ejs
[Sprint Samsung Galaxy S 4 General] eric303:
excuse my igorance, but i notice it was a BIN file, so it has to be flashed via custom recovery and not ODIN, i cant seem to find a thread about installing a custom recovery, i searched TWRP since its one of the most popular one but cant up empty

edit: so i found TWRP works on it, but still cannot install the bin file via custom recovery or ODIN

I tried to flash the modem via CP on odin 3.09 and it says fail, it fails after NAND Write, NAND Write Start!!! > Transmission complete.. > Now Writing.. Please wait about 2 minutes.. > FAIL!

I did also make sure my phone is a L720T and i also made sure that the modem i downloaded was for the L720T from the previous post above me and also another post that says its 720T. I'm currently on 4.4.2 BOA3 if that makes a difference
[Sprint Samsung Galaxy S 4 General] dirtyalphaman:
No messaging after unlock and flash!

I unlocked a while a few months back using the method in the OP. It worked good going and I flashed the JFLTE GPE ROM. I was experiencing a few issues and tried to flash another ROM, but it failed. After reading a few posts in this thread, I thought because I was using a Straight Talk At&t sim, I could use an At&t Rom. But it failed. I then tried to flash a Sprint Rom and thought I lost my unlock because it showed no sim and I got no data or calls. After going back to the JFLTE GPE Rom, I played with a few settings and got my calling and data back, but not my messaging. I tried a few different Straight Talk Apns and still couldn't get my messaging back. I even went to stock 4.4.2 and still have my unlock, but cannot get messaging. I've tried several different Roms (Spring only) and they all work great..........except for messaging. Can anyone here help? Is there a part of my unlock that I really lost that won't allow me to message?

You help is greatly appreciated!
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
It can indeed be flashed using Odin. I've done it plenty and never had an issue. Try a different version of Odin, or find a different source for the file.

No. Calls and texts run on the same connection (and the APN has nothing to do with it btw). There's no reason calls would work but not texts - as long as you did a clean ROM flash. If issues persist, could be a ROM bug, or an issue with your SIM or the network itself
[Sprint Samsung Galaxy S 4 General] dirtyalphaman:
First, thanks for your help and reply. Second, I'm not disputing you, just trying to gain clarification. If you go to any forum that deals with Straight Talk APN settings and you will see someone complaining about not getting texts/mms and one of the common solutions is to try a different APN setting. It has even helped me in the past when flashing different Roms on my Note 2. Some messaging apps even had their own APN settings before (for example Hangouts). This seems to have disappeared for one reason or another. I was having issues with a Rom and flashed another and then the messaging problems started. I went back (complete wipe) to the Rom I started with and still had no messaging. I'm back to stock now, but still no messaging. Once again, I'm not disputing what you're saying, just stating my confusion about the issue. I have tried multiple texting apps too. Does anyone know what a At&t Error code 96 is? I wonder if straight talk's apn setting have changed any.
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
The APN has nothing to do with texting. MMS, yes. SMS, no. Take any fully working phone (calls, texts, MMS, data, etc) and delete the current APN - calls and texts will still work fine. SMS still runs over the base 2G network. Internet is needed for MMS because the message has to be uploaded to the server from the sender's phone and then downloaded to the recipient's phone.
[Sprint Samsung Galaxy S 4 General] Chevyblood561:
I had that issue I DL handcent messaging app from play store. Under application settings from the handcent app select mms settings. Then select carrier setup. Then choose smart. See if that works??
[Sprint Samsung Galaxy S 4 General] bthorne79:
Right now if the L720T unlocked Sim can't run 5.1.1 Roms you will not have calls or messages if you want to run anything it will have to be 5.0.2 and below. Not sure what changed but I think it has to do with the Ruim/Sim NV I've tried to do the dialer code *#*#4636#*#* and change to wdma preferred and it will not stick it will auto back to LTE/CDMA I'm to believe thats the issue