yashsingh1/xdaforums huggingface dataset:
[Sprint Samsung Galaxy S 4 General] ecs87:
I don't mean to be a ****...but did you read what I posted above you? All of this rooting, using whole firmware files to downgrade, doing a handstand for 557 seconds, etc is not necessary. Take ANY 4.3 or 4.4.2 build and reboot in Odin. Load the MDC MODEM ONLY. DO NOT LOAD SYSTEM. DO NOT LOAD CACHE. DO NOT LOAD THE BOOTLOADER. DO NOT LOAD NON-HLOS. And so on... After you reboot from flashing the MDC MODEM ONLY (remember...ONLY FLASH THE MODEM FILE) you'll have access to the service menu, this does NOT matter which build you're on but rather what modem you're running. I've ran MK2 (I think that's the latest 4.3 build) and NAE without any issues AS LONG AS I HAD THE MDC MODEM! Unlock via the service menu. Reboot into odin, flash the proper radio to have all your build numbers the same. Reboot win.

You can't edit your APNs because you're too far back on updates. If you flash up to 4.3 or 4.4.2 you'll be able to edit the APN.

Sent from my SPH-L900. Please hit the thanks button if I helped you out!
[Sprint Samsung Galaxy S 4 General] skrapmetal:
Sorry, guess I misunderstood. Could I upgrade back to mk4 and edit the APN now?
[Sprint Samsung Galaxy S 4 General] ltindi32:
hello. I am nae on my galaxy sph-L720. I can flash the mdc modem without any problems to begin with unlocking?
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
THis is what I've been waiting for all along. I've unlocked ATT S4's (on 4.3 with Knox and all) by flashing an earlier modem and then doing the dialer codes. Makes perfect sense that you'd also be able to Odin flash *just* the modem and do the dialer trick. But to confirm, have you done this yourself on an SPH-L720 on 4.3/4.4 with success?
[Sprint Samsung Galaxy S 4 General] dimm0k:
can you flash just the modem on 4.3 without tripping the KNOX warranty?
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
Most likely, yes. You can do that to the ATT version without tripping Knox - see the thread for more details
[Sprint Samsung Galaxy S 4 General] dimm0k:
hrmm, searching through this thread it seems it would trip KNOX if you have KNOX already on the device unless you're referring to another thread.
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
another thread
[Sprint Samsung Galaxy S 4 General] ecs87:
If you're already internationally AND domestically unlocked (and can confirm it before moving forward) then yes you can upgrade to MK2 (AFAIK MK4 is a L900 4.3 build) or NAE or whatever other build comes out.

Sent from my SPH-L900. Please hit the thanks button if I helped you out!

---------- Post added at 05:37 PM ---------- Previous post was at 05:36 PM ----------

Yes. I guarantee this.

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---------- Post added at 05:39 PM ---------- Previous post was at 05:37 PM ----------

Yes I've done this MYSELF on the L720 with MK2, NAE, MF9, etc. I work at a cell phone shop as one of my jobs so I get to see a lot of phones on a lot of builds and get to do some testing/tinkering that wouldn't be viable for a normal consumer. I promise it works on 4.3 and 4.4.2 ;)

Sent from my SPH-L900. Please hit the thanks button if I helped you out!
[Sprint Samsung Galaxy S 4 General] syconu:
i am trying to find out how to get a friends unlocked its a sprint l720vpuemk2 will this work on this phone or can i down grade and if so can i plz have some help i did my verizon s3 to straight talk but i dont know if i can put this one on straight talk plz help
[Sprint Samsung Galaxy S 4 General] MMMGP:
Noob here, my first post.

Where do I get the NAE build modem I'm currently on to flash it back after the unlock?
[Sprint Samsung Galaxy S 4 General] lavang:
Help with MMS message

Hello all,

My Sprint GS4 was on the NAE modem. I flashed the MDC modem and followed the instruction. Everything went okay except for step 12, where you edit the build prop and put in the APN. I could not add in the two lines and the APN shortcut settings doesn't do anything when I installed it from Google Play. I just go ahead and reboot the phone

I was able to use Tmobile SIM with my GS4 and getting HSPA+. I manually go to Settings->Mobile Networks and Add the Tmobile APN. I could not find a setting for MMS protocol: WAP 2.0. Almost everything is working great with my newly converted GS4, except for MMS message. I can send normal text message but can't send any MMS message. Is there any settings that I could check ?

I did not root my phone at all, just flash the MDC modem and access the service menu. Maybe that's why I can't edit the build prop.

Please help. Thank you very much.

Here is my phone information:

Android 4.4.2

Baseband version: L720VPUAMDC

Build Number: KOT49H.L720VPUFNAE

Kernel Version: 3.4.0-481102

Attached is screenshot of my phone settings->about device
[Sprint Samsung Galaxy S 4 General] NoobToobTony:
Not really, when I was on the MK2 bootloader, it let me use Odin to flash the mdc modem only tar but it would not boot, it kept saying something about unofficial software found on phone or something .... that's why a lot of people want to downgrade their bootloader. . But when I tried it on the NAE bootloader, the mdc modem only tar works fine, so I guess it depends on your luck
[Sprint Samsung Galaxy S 4 General] MMMGP:
Sorry, don't have an answer to your question.

I'm curious. If you put your Sprint SIM back in, would you have service using the MDC flash?
[Sprint Samsung Galaxy S 4 General] CyberpodS2:
No wifi...

Well I thought everything was going well, but when I got to #12 I discovered I can not turn on the wifi. It was clearly working as I used it to download the needed stuff along the way. I must have boned something up?? Any thoughts on where to start looking? Or what is the easiest way to start from scratch and go through it again? I at least want to be able to use Sprint again.
[Sprint Samsung Galaxy S 4 General] NoobToobTony:
What modem and rom are you using? Some roms will not work with the mdc modem, just update the modem back to whatever you were on before you did the unlock...
[Sprint Samsung Galaxy S 4 General] CyberpodS2:
Thanks for responding,

Update to status: reflashed stock mf9 one click and have wifi back but no data. I am assuming some of the settings changed in the service menu are doing that? Anyway, since I have wifi I'm going to grab the apn settings shortcut and build.prop editor in the Play Store before doing anything else. Then I'll reflash the mdc modem. Then I'll go through the whole routine again and see how I make out.
[Sprint Samsung Galaxy S 4 General] NoobToobTony:
Yes once you put those settings in the service menu they will stay that way until you do the sprint reset, which I'm not 100% sure what it is but for the note 3 its ##72786#, may or may not be the same, but don't worry about that if you don't plan on going back to sprint, just put in the apn and you should be good to go

---------- Post added at 04:46 PM ---------- Previous post was at 04:24 PM ----------

Yes ##72786# is the reset but you should only do that if you're still on sprint or you will be stuck with the hands free activation screen that keeps popping up every 5 minutes
[Sprint Samsung Galaxy S 4 General] skrapmetal:
Guide worked great using metropcs sim, I am able to SMS, MMS, call, 2g and 3g work but no 4gLTE, is there a fix for this or did I miss something?
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
T-Mobile and Sprint LTE are not interoperable.

That is correct - root needed.

There are a few different dialer codes and methods floating around out there - mind posting the one(s) you've used with success, [MENTION=4959296]ecs87[/MENTION]? TIA.
[Sprint Samsung Galaxy S 4 General] CyberpodS2:
Ok, got it all working. For some reason I could not get it to detect the T-mobile system on the stock rom. Maybe I made a mistake somewhere. I was out looking for a spot where I assumed a good T-Mobile signal would be. I finally gave up but at the last moment decided to restore my nandroid of Carbon 4.4.2 and rebooted.

I went to: Settings>Wireless & Networks:More>Mobile Networks>Network Operators then hit (Choose Automatically) and after a moment I got bars and then a text from T-Mobile welcoming me to the network. LOL All I know is it's working. :) Thanks to those who helped me here!
[Sprint Samsung Galaxy S 4 General] abced123:
international SIM

Does this method also unlock international SIM or we still need to ask Sprint to unlock it ?
[Sprint Samsung Galaxy S 4 General] NoobToobTony:
What kind of speeds are you getting? And do you get lte or just hspa+,

---------- Post added at 11:40 PM ---------- Previous post was at 11:35 PM ----------

No you have to do the international unlock first.. it's pretty easy just follow this video:

http://www.youtube.com/watch?v=lawcT1qqnLA
[Sprint Samsung Galaxy S 4 General] skrapmetal:
I did a speed test and got 8022kbps download, 2557kbps upload. I was told lte wasn't available on this unlock, only hspa+. If you know a way to get it working, please let me know.
[Sprint Samsung Galaxy S 4 General] NoobToobTony:
Haven't tried it yet but cm 11 based roms have a global-LTE/CMDA/EVDO/GSM/WCDMA network options, touch wiz roms have cdma/lte/evdo or gsm/umts... might be worth a try to see if lte works on cm11 roms

---------- Post added at 01:23 AM ---------- Previous post was at 01:14 AM ----------

And I'm also using a regular straight talk 4G sim card not the lte one so I can't try it out either way
[Sprint Samsung Galaxy S 4 General] skrapmetal:
I was able to set wcmda using an app. I have metro pcs but still no lte. I'm on the stock ROM.
[Sprint Samsung Galaxy S 4 General] ajent:
Spent hours now trying to get this working without success.

Phone is sim unlocked but i'm not sure if I ever did the steps with the service menu, it's been long since i've used this phone.

I've tried sacs 4.4 rom & stock MK2, tried flashing the MDC radio and it appears to flash properly, once phone reboots I lose signal/wifi etc. but I'm trying to get into that service menu and it isn't working.

I'm not getting the Invalid Sim message & thought I remembered once it's unlocked it can't be re-locked.

I know the simcard is good. Have tried t-mobile & net10. When trying to scan for networks to connect to, nothing ever displays.

any help would be greatly appreciated, thanks

////////

sigh. Didn't put the * in the # code. Will see if I can get it all working now.

\\\\\\\\

Changing modem to MDC on the MK2 stock allowed me to make the changes I needed and it's working good again now.

thanks
[Sprint Samsung Galaxy S 4 General] lavang:
Thank you for responding

I ported my number over to TMobile so even if I put my Sprint SIM back in , I would not get services. However, if I change the network mode in mobile networks - > network mode to CDMA , everytime I dial, I get Sprint operator telling me that my phone is not in service.
[Sprint Samsung Galaxy S 4 General] MMMGP:
Thanks for replying, I appreciate it. So it seems like this domestic unlock is permanent. Was just curious if I could go back to Shrint in the event something didn't code well.
[Sprint Samsung Galaxy S 4 General] vboyz103:
Just FYI, I did this unlock for some time now and recently been testing the T-Mobile/Walmart special $30 (unlimited data/text/100 min talk) plan on my Sprint GS4 for about one week now and seems to work great. Data speed on T-Mobile LTE APN is peaking at 12Mbps [MENTION=5093911]HSPA+[/MENTION]. I'm experimenting with Groove IP to get voice calls using Wifi/HSPA+ data to counter the 100 min talk limit. So will see how I do for 1 month. If all works well, I only need to pay $30 for almost unlimited everything a month without contract :).

I used PAC-Man T-Mobile Rom over T-Mobile forum which allows me to connect to LTE APN where other roms wouldn't...weird!
[Sprint Samsung Galaxy S 4 General] NoobToobTony:
Did you have to change the kernel or anything? Or did it just work out of the box?
[Sprint Samsung Galaxy S 4 General] vboyz103:
With current build of PAC, I didn't have to flash any sprint's specific kernel, the default kernel that came with stock just fine. Not sure if the devs made it generic enough to detect between CDMA vs GSM phone at kernel level???

I did have to modify the build.prop to include some of the GSM network configs, and also the updater-script to just copy the GSM libs instead of CDMA. The updater-script came with PAC detects the device types and will copy appropriate "blobs", in this case it should copy the CDMA blobs but that's the reason I modded the updater-script to force copy of GSM.
[Sprint Samsung Galaxy S 4 General] skrapmetal:
I am using a Metro PCS sim so I am on the T-Mobile network. In my house it switches to at&t since my T-Mobile signal is so weak, which is fine BUT I get no data in my house with at&t nor with T-Mobile. Is that normal?

I would at least get 1x with my old CDMA metro phone....
[Sprint Samsung Galaxy S 4 General] vboyz103:
Normal or not really up to you if you want data at your home. You might want to try finding a valid APN setting for your carrier and see if that brings the data back.
[Sprint Samsung Galaxy S 4 General] ReyPaez:
Help with receiving MMS

I have the same setup as you and I'm having a similar problem with MMS but instead I'm not receiving them maybe is something to do with NAE I even ODIN the full NAE tar and still the same, other than that is perfect..
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
If you're roaming on ATT, theoretically you would need the ATT APN to get data. But the question is whether your Metro plan has/allows roaming, so you might want to check with them on that.
[Sprint Samsung Galaxy S 4 General] skrapmetal:
When

No roaming... I think the problem lies with my APN. When I put the AT&T one in and try to save it, it deletes and doesn't save. Its one of the numbers toward the end of the APN it doesn't like. I have to tinker around with it and try a different APN I think. Right now, data is the only thing not working when connected to AT&T. Would having a missing APN cause data not to work? Calls and texts work just fine.
[Sprint Samsung Galaxy S 4 General] vboyz103:
I think the MNC number does matter as it denotes the network operator ID. I learned that certain roms have problem correlating the correct MNC in the APN settings, thus giving the behavior to have users feel that their APN is not SAVED, but in fact it is saved but since ROM does not correctly ID the MNC therefore, it couldn't pull up the correct APN. To verify your saved APN, get a SQLite editor from play store and look at the /data/data/com.android.provider.telephony/databases folder and you'll see your newly create APN is there.

I also recommended that you look at the build.prop properties to identify the network. Here are the two that I think it really tells the system if your phone should behave as GSM or CDMA.

Here's how I force GSM on my Sprint with SIM plugged in.

telephony.lteOnGsmDevice=1

ro.telephony.default_network=9

Also I learned that GSM and CDMA carry different libraries in /system/lib, the two are:

libril.so

libril-qc-qmi-1.so

In my opinion, these libs probably control how dialer should handle signal between GSM and CDMA, thus is the root cause of my long standing issue with CDMA dialer can't hang up calls on GSM network. I don't know for sure though.

Follow my guide on using AOSP roms for unlocked Sprint phones on GSM network:

http://xdaforums.com/showthread.php?t=2539794
[Sprint Samsung Galaxy S 4 General] NoobToobTony:
I had the same problem on 4.4.2 touch wiz roms. .. for some reason mms is a issue. .. I just used the latest triforce rom and everything works perfect
[Sprint Samsung Galaxy S 4 General] skrapmetal:
I changed to straight talk and now I'm enjoying H+ just about everywhere. No more APN or MMS problems. I entered the APN the sim card came with and it worked right out of the box. Nice speeds too for not being full 4gLTE.
[Sprint Samsung Galaxy S 4 General] Emma101:
Help...

I have a couple questions:

1. does my phone have to be rooted to be able to do the domestic unlock??

2. My android version is 4.4.2 so will I still be able to do the unlock?

Thanks.
[Sprint Samsung Galaxy S 4 General] ReyPaez:
Yes and yes....
[Sprint Samsung Galaxy S 4 General] eheilner:
I don't think you need root since your able to edit the APN.
[Sprint Samsung Galaxy S 4 General] ReyPaez:
If I'm not mistaken there are some editing that has to be done to the build.prop
[Sprint Samsung Galaxy S 4 General] eheilner:
yeah ril.sales_code=lol ro.csc.sales_code=lol

but since the 4.3 update you should be able to edit/add the APN without needing to input the codes.
[Sprint Samsung Galaxy S 4 General] MaD4dEaTh:
Will this unlock method work with the Tri-Band version (SPH-L720T)? I've been searching around on google and through these forums but I have not been able to find an answer. Any assistance would be greatly appreciated
[Sprint Samsung Galaxy S 4 General] Emma101:
Help...

My phone has a different baseband, NAE- how will it be possible to domestically unlock it then? picture attached.
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
I have a friend who would like to do this unlock but his S4 has been flashed to Boost. Without me knowing exactly what parameters are changed in order to accomplish that, I have no way of knowing if this method will work for him. Anyone have experience in that regard?
[Sprint Samsung Galaxy S 4 General] Emma101:
How were you able to flash to the MDC modem?? Please let me know what steps you did and/or what program you used because I tried with ODIN and failed two times...got my phone soft-bricked but restored it back to normal.
[Sprint Samsung Galaxy S 4 General] ecs87:
You're fine. The NV items that were altered to get it on Boost has nothing to do with the GSM unlock.

Sent from my SPH-L900. Please hit the thanks button if I helped you out!

---------- Post added at 10:47 AM ---------- Previous post was at 10:46 AM ----------

STOP FLASHING THE FULL FIRMWARE FILE. This had been mentioned multiple times in this thread. Flash the MODEM only. You do this through Odin and it WILL NOT fail. If you try flashing the full firmware you're trying to write a old bootloader over a newer secured bootloader which is a no no.

Sent from my SPH-L900. Please hit the thanks button if I helped you out!

---------- Post added at 10:49 AM ---------- Previous post was at 10:47 AM ----------

As long as you're on 4.3 or higher you'll be able to edit the APN settings without and build prop edits. And therefore...no need to root.

Sent from my SPH-L900. Please hit the thanks button if I helped you out!

---------- Post added at 10:50 AM ---------- Previous post was at 10:49 AM ----------

Doesn't matter which baseband you have (for now). Just follow the instructions.

Sent from my SPH-L900. Please hit the thanks button if I helped you out!
[Sprint Samsung Galaxy S 4 General] warriorpluto:
i get flash failed. im on 4.3 when trying to flash the rom
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
Doing this tomorrow for a friend. Has anyone had trouble getting with the dialer code and had to change the build.prop or change the efs flag as mentioned in the OP?
[Sprint Samsung Galaxy S 4 General] ecs87:
Facepalm. Why are you trying to flash a ROM? You flash the MODEM ONLY.

Sent from my SPH-L900. Please hit the thanks button if I helped you out!

---------- Post added at 07:46 AM ---------- Previous post was at 07:44 AM ----------

As long as your baseband is MDC you'll have the service menu. If it isn't MDC, you wont. No if, ands, or buts.

If the dialer code isn't working, BE PATIENT. The more **** that's on the phone, the slower it works. I've had service menus pop up immediately and sometimes it takes ~30 seconds.

I've NEVER needed to touch the build.prop or change anything in the system for this unlock.

The OP needs to be revised...

Sent from my SPH-L900. Please hit the thanks button if I helped you out!
[Sprint Samsung Galaxy S 4 General] warriorpluto:
Forgot to report back. All is well. Got my AT&T sim card working. I wonder if this method works for the Sprint galaxy mega? Thanks for the information. You guys are geniuses;) contribute so much to society
[Sprint Samsung Galaxy S 4 General] eheilner:
when you put in the build prop codes it turns off the ##codes#. but *#codes# work. you can use an app like PRL helper to get into edit APN or if before you put in the code if you put the phone in gsm/umts then input the code reboot. edit apn will be under network setting menu.
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
[MENTION=4959296]ecs87[/MENTION] has stated that as long as you're on 4.3 or 4.4, no additional apps or changes are needed in order to edit the APN.... correct?
[Sprint Samsung Galaxy S 4 General] eheilner:
yeah if your on 4.3 or up you don't need root.
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
[MENTION=4959296]ecs87[/MENTION] my friend's IMEI shows as all 0's - are you sure this will work??
[Sprint Samsung Galaxy S 4 General] ecs87:
It might work with an IMEI of 0, but if it doesn't:

Smack him upside the head for messing it up...then put the phone into diag mode (##DIAG# and DM+MODEM+ADB), connect it to the computer, load DFS CDMA tool (free version) and after sending the right spc code and 16 digit password change the IMEI back to original. Win (smack him again should you feel the need to do so).

Sent from my SPH-L900. Please hit the thanks button if I helped you out!

---------- Post added at 12:40 PM ---------- Previous post was at 12:36 PM ----------

IIRC this is similar to the N900V domestic unlock BUT the big hurdle is the international unlock (which is needed for the domestic unlock). We have a sweet program here for the L720 for the international unlock, but nothing for the N900V and most likely nothing for the Mega either.

Sent from my SPH-L900. Please hit the thanks button if I helped you out!
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
Dialer steps went perfectly. Rebooted. Have no bars under signal indicator, red x on top. Roaming settings set as they should be per OP, phone will search and find both T-Mo and ATT, but will not register. Could the IMEI be affecting this (it shows as all 0's, not just one 0)?
[Sprint Samsung Galaxy S 4 General] ecs87:
That's what happens with blocked/blacklisted IMEIs. You're going to need to change it back to original (which hopefully isn't blacklisted)

Sent from my SPH-L900. Please hit the thanks button if I helped you out!
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
The MEID is fine - he checked that with Sprint. I've never used DFS but could probably figure it out. Do you have any links handy to find out SPC + 16 digit code?
[Sprint Samsung Galaxy S 4 General] eheilner:
As long as your baseband is MDC you'll have the service menu. If it isn't MDC, you wont. No if, ands, or buts.

If the dialer code isn't working, BE PATIENT. The more **** that's on the phone, the slower it works. I've had service menus pop up immediately and sometimes it takes ~30 seconds.

I've NEVER needed to touch the build.prop or change anything in the system for this unlock.

The OP needs to be revised...

Sent from my SPH-L900. Please hit the thanks button if I helped you out![/QUOTE]

"If it isn't MDC, you wont. No if, ands, or buts." BUT you can also do it on MDL just have to key input 0 and wait a few it will take you into the service menu.edit i just flashed all MDC MDL and MF9 modem and am able to get into the servicemode just hit back then key input 0 and wait a few seconds don't let the screen time out