yashsingh1/xdaforums huggingface dataset:
[Sprint Samsung Galaxy S 4 General] maurogg84:
Thanks for the guide it really worked for me. I've got the international and domestic unlock. The only problem is I'm using an AOSP ROM, so whenever I restart the phone it doesn't connect to data because it goes back to lte, is there anything I can do so I don't have to go to hidden settings to select WCDMA only every time I restart the phone? Like a build prop setting or a script? Thanks in advance.

Sent from my SPH-L720
[Sprint Samsung Galaxy S 4 General] maurogg84:
For the cricket users that don't like its voice-mail app, you can still use Google voice lite, after activating your Google voice number, when setting up conditional forwarding for your cricket number, don't select cricket as your carrier, select at&t. It worked for me, the cricket codes didn't work. After that set up hangouts, and you'll have everything in one place.

Sent from my SPH-L720
[Sprint Samsung Galaxy S 4 General] M1lt:
Working on NG2 with MDC modem

I was able to get it up and running on NG2 and I've tested it with both ATT and Tmobile sims. Feel free to PM if you encounter problems, because I had every single one ;) .

Tips:

1. Start fresh. Factory reset before you begin if possible.

2. Root your device, install busybox and supersu before the MDC modem (just the modem, not the whole firmware package).

3. When you are in *#0011# menu in step 5 of the original post your phone will say "PLZ Reboot" at a point. Reboot then. This fixes the red x no signal issue.

4. If you are seeing the invalid sim issues you missed or messed up the international sim unlock step. Try it again. You run the program while your phone is still on the debug menu that says PDA. You might need to reinstall the original firmware and modem if you are still seeing no signal. Once you have a signal with the original sim try starting over.

5. You will not see the APN settings for other services (ATT, Tmobile, etc.) if you have a Sprint sim in the device. I recommend putting in your new sim from the beginning.

Thanks to all the OPs and everyone for posting all their helpful messages. I'm not an expert, but I would like to help others avoid the issues I encountered.
[Sprint Samsung Galaxy S 4 General] ciabatoni:
Sprint 2 At&t

Im curious, Im currentlyon MK2 and I thought that was earlier then MF9, Correct me if im wrong but isnt MF9 the latest ? Anyhow, I flashed my sprint s4 to cricket and been using it there, this month the guy ask if I wanted to upgrade and move to GSM so I could get 4glte. I agreed beings I had the At&t P8010. In the meantime Im trying to get my Sprint S4 to recognize the At&t Sim, "I did the sim unlock method via Autoprime" But it still doesnt recognize the sim, So Im gonna take this approach here, Just curious why I need to flash the latest modem?
[Sprint Samsung Galaxy S 4 General] ecs87:
Downgrade to MDC modem. You MUST be on MDC baseband to unlock. After unlocking flash the modem that corresponds with your current build. Afaik the latest build is NG2. NAE was before that and I think MK2 was before NAE. MF9 is a significantly older build.
[Sprint Samsung Galaxy S 4 General] cyrusalmighty:
My friend got his service cut due to not paying bill and since I know the bootloader isnt locked I assumed it was sim unlocked as well. I tried my AT&T sim but got an error message.

My friend thought it was because Sprint locked the phone, but I will try this method. I know sprint locks phone by registering ESN as bad so you can not reactivate on other CDMA networks but shouldnt it work on GSM once unlocked?
[Sprint Samsung Galaxy S 4 General] ecs87:
They share blacklists now.
[Sprint Samsung Galaxy S 4 General] ciabatoni:
So, are you saying all I have to do is flash the MDC Modem to due the domestic unlock? Also in this http://xdaforums.com/showthread.php?t=2415587 is it the same here, Just the "Modem" Im doing both International and Domestic unlocks. Im with cricket and upgraded to there At&t Servers, so Im now on GSM. Now, that I know its just the modem, Ill give it another shot. Either way, Ive been trying to access the Service menu ##0011# Ive done the back and select/key input multiple times and had no luck accessing said windows, Is the MDC MODEM gonna allow for that to happen or something? Thanks, Ive also change overwritten my efs/Hiddemmenu from False to True, but still No access, k, Im gonna get the flashing.
[Sprint Samsung Galaxy S 4 General] ecs87:
Well...you still need to run the intl unlock tool and go through the service menu for the domestic unlock But yeah that's all you need to do in terms of firmware mismatching to bypass "security".
[Sprint Samsung Galaxy S 4 General] ciabatoni:
Hey I appreciate the help. I just did the whole process and Im not sure if it worked or not. My dude at the cricket store said that if the phone was able to work on the At&t network that as soon as I installed the Sim Card it would recognize it and say cricket in the about phoe/ status section, I did everything to the "T" There are a few things Im curious about, Like STEP 9 I noticed that even though you select all for each, It only puts an asterisk * on the last selection, In my case LTE/All.

Also, Would my flashing this phone from Sprint to cricket have anything to do with causing the Domestic Unlock to FAIL? And wen It says """"reboot the phone manually:manually:manually IMMEDIATELY""" Are we talking remove battery, Or just Power/Reboot? Thanks, Sorry for the lame questions, Ive been doing rooting/recoveries etc a long time, but this is a first for unlocking or making usable on gsm. Thank you

---------- Post added at 10:10 PM ---------- Previous post was at 09:45 PM ----------

I got Voice and SMS, Im trying to find At&t APN settings now, so no MMS or 4glte Any thoughts on the best apn settings for this. Im researching now.
[Sprint Samsung Galaxy S 4 General] daniel4653:
You will NOT get LTE on any other network other than sprint.
[Sprint Samsung Galaxy S 4 General] ciabatoni:
Whattttttt

Wait, WHAT... That sux... Ive had a s4 for over a year and never had anything more then 3g on it bc its a sprint flashed to cricket. So Ive be using my pantech P8010 on the cricket/At&t service with 4Glte, I havent even noticed a big difference between 3g/4glte. So now that I unlocked the Sprint S4 to work on at&t your teling me I wont get LTE, will I even get 4g?
[Sprint Samsung Galaxy S 4 General] daniel4653:
There are different frequncies that the sprint gs4 does not support. Yes you will have 4g aka HSPA+ that is throttled at 4 MBps.

I'm currently using my sprint gs4 on cricket.
[Sprint Samsung Galaxy S 4 General] bbuchana:
Can you provide a link to the ROM you used?

Thanks
[Sprint Samsung Galaxy S 4 General] nicotheandroidguy:
Here you go http://xdaforums.com/showthread.php?t=2545711
[Sprint Samsung Galaxy S 4 General] sergio_79:
tks for tour help really appreciated :good:
[Sprint Samsung Galaxy S 4 General] jusinjusin:
Thanks for the very detailed instructions! I've successfully got a T-Mobile sim card working, and now I'll be trying out Straight Talk.

With this step:

I could not select all the choices as one. It seems like since LTE was the last choice I selected, that was the only network selected on my phone. So I just went back and only selected GSM ALL and then continued with the rest of the steps
[Sprint Samsung Galaxy S 4 General] aktran9:
Did you ODIN the rom or flash in recovery? The reason I asked is that if you came from a Sprint rom and did a recovery flash of this rom, then the kernel is Sprint. Whereas if you ODIN the tar file then it's a tmobile kernel.
[Sprint Samsung Galaxy S 4 General] nicotheandroidguy:
Just flash it in recovery you don't need the sprint kernel you can use the T-Mobile kernel just fine.
[Sprint Samsung Galaxy S 4 General] premiumg:
Are there any particulars we should watch out for in terms of losing domestic sim unlock? (For example, should we avoid TMobile's MK2 ROM? I wanted to flash that but wasn't sure if we'd lose sim unlock)
[Sprint Samsung Galaxy S 4 General] ftwaynejuggalo16:
I seen someone ask it but I did not see a reply. This will not work with mja correct? Because I can't get past the first service menu page.
[Sprint Samsung Galaxy S 4 General] dataman:
No mja.
[Sprint Samsung Galaxy S 4 General] jusinjusin:
So I've successfully unlocked my phone and am currently using Straight Talk as my service provider. In Calabasas, CA, I am only getting Edge. Using the coverage maps from T-Mobile, it says my area should have 4G/HSPA+/Whatever. Maybe the 4G here isn't running on the same band as the S4? I will report my speeds from other places in the future. Thanks again imbmiller
[Sprint Samsung Galaxy S 4 General] rmc16:
It works!

Works for Straight Talk, call. txt, data (H+) photo attached.

Followed all steps provided by imbmiller - kudos for him - , and edited exact APN settings for straighttalk with "APN Setting Shortcut"" app on Google Play.

The only problem I have so far is with Voice Mail, can't access it, maybe some of you know how to.

Thanks and Great work!
[Sprint Samsung Galaxy S 4 General] h20wakebum:
Flashed back and tried your method step by step.

I'm stuck on:

4) Press the left menu softbutton (the menu button that lights up and vibrates when you touch it) then press the either the button “select” or “Key Input” and type the number 1 or 2 into the box, if nothing happens press menu and select the “back “ button then repeat. This app is sort of like a tin can radio, you can kind of tell that it’s working, but it doesn’t work well.

Depending on if you pressed 1 or 2 in the dialogue box it will take you into either an UMTS or CDMA menu. If you are in the umts menu, press the menu button and select back, this should then proceed to the next step.

No matter what I try, entering 1 or 2 does nothing... it just sits at that informational page when you first access service menu.

What network mode do i need to be in? When i am in CDMA/LTE mode, and i enter service menu, it just says no service. entering 1 or 2 does nothing.

In GSM/UMTS mode, i also can't get past the first page of service menu. See screenshot, whether i press key input or select and then choose 1 or 2... it does nothing, i hit back and try again... still nothing.

View attachment 2448345

Not sure why, but after i rebooted the phone and do the same exact thing.. this is now what i see in the service menu. I choose key input 1, nothing changes, then menu back and key input 2, then it is the same screen but you cna see it added the number 2 to the lower line...

View attachment 2448355 View attachment 2448357

WTH

Please advise.

Can i do this with no SIM in or do i need a sim in?
[Sprint Samsung Galaxy S 4 General] h20wakebum:
How did you get past the service menu issues I'm facing?

See my post above.
[Sprint Samsung Galaxy S 4 General] rmc16:
I don't know if it works with no SIM in it, I've done the steps with the SIM in it.

All the time I was on GSM/UMTS network.

Make sure you are on MDC baseband before trying to enter Service Menu, otherwise it won't work.

If it helps try these steps: galaxys4root.com/galaxy-s4-tutorials/how-to-unlock-sim-on-sprint-galaxy-s4 (and then try going from step 4 on imbmiller post)
[Sprint Samsung Galaxy S 4 General] h20wakebum:
i did flash back to mf9 after i did the international unlock step.

I am flashing back to MDC and going to test (I will also put my SIM in).
[Sprint Samsung Galaxy S 4 General] h20wakebum:
So on MDC i was able to make the changes in the service menu.

My issue is that after i followed the steps of using HiAPN, when i go to review networks, I do not see WCDMA, I only see CDMA, CDMA/LTE, GSM/UMTS and auto.

View attachment 2448572

Any ideas?

I remember this had happened last time i tried it, i followed every step to the T but no luck using the OP's method.
[Sprint Samsung Galaxy S 4 General] rmc16:
Select GSM/UMTS and should work.
[Sprint Samsung Galaxy S 4 General] h20wakebum:
HOLY CRAP!!!

That did the trick!!

H+ and voice and such working, BAM.

Thanks so much!
[Sprint Samsung Galaxy S 4 General] rmc16:
I'm glad it worked

How about the voice mail service, I can't access it. In About Device - Status it sees my phone# like this: 000-000-0016. MMI code error

Any ideas on accessing the Voice Mail service?
[Sprint Samsung Galaxy S 4 General] h20wakebum:
Not so much, mine shows my old sprint number.

I also use google voice so not too sure.

So... now that this is done can i flash a tmobile ROM over this?

Will the settings stick?
[Sprint Samsung Galaxy S 4 General] ecs87:
HSPA should be more than enough for most users. If you're used to cricket 3G, your be more than satisfied with the HSPA speeds. Coverage...may be a different story. I'm personally not on the cricket network.
[Sprint Samsung Galaxy S 4 General] ciabatoni:
So If your currently on cricket w/ a Sprint 4s, May I ask what your APN settings are? Would you mind posting a screen shot? Also, Are you using a custom rom, If so what? Ive been thinking about trying out the Stockish-V06, But I wanna get my APN settings straightened out first, before I flash the ROM, And The modem back to MK2...

Also I added ril.sales_code=LOL

ro.csc.sales_code=LOL to the very bottom of the build.prop, Bc its never pointed out were to add these lines in the build.prop, just that they needed to be added, So did I not have to do this, Or did I add them in the wrong spot? Im currently deleting them....

---------- Post added at 11:30 PM ---------- Previous post was at 11:25 PM ----------

I dont know what happen, But when I was hitting add for apn Then save exit, they werent sticking, So I added ril.sales_code=LOL

ro.csc.sales_code=LOL to build.prop, And now my "DIALER CODES" Arent working
[Sprint Samsung Galaxy S 4 General] maurogg84:
If you did everything correctly you should be able to get H+, here are the APN settings for cricket https://www.cricketwireless.com/su...ce-byod/customer/bring-your-own-android.html

Sent from my SPH-L720

---------- Post added at 11:39 PM ---------- Previous post was at 11:33 PM ----------

Do you still have the same modem? Which touchwiz version you have? NG2? [MENTION=4773184]ciabatoni[/MENTION]

Sent from my SPH-L720
[Sprint Samsung Galaxy S 4 General] daniel4653:
Those are the exact APNs that I out in. And I'm running stock NG2

---------- Post added at 08:48 PM ---------- Previous post was at 08:47 PM ----------

But I have ran, sacs , nega, blu Kuban, hyperdrive, golden eye, paranoid android, slim Kat.
[Sprint Samsung Galaxy S 4 General] ciabatoni:
Still on MDC Modem and TW is the 4.3 MK2 Build, Now that I deleted the lines I put in the build.Prop I can access dialer codes again. But, the Apn field is still blank and not saving, So am I supposed to add those lines or Not, And if I am where do I actually ad them, between what lines

---------- Post added 28th October 2014 at 12:07 AM ---------- Previous post was 27th October 2014 at 11:55 PM ----------

Very strange, after entering the info you provided https://www.cricketwireless.com/supp...n-android.html then saving, it stuck. And I was then able to select the dot.Just rebooted. And testing now...I now have the H+ "Yayyy" MMS and WEB ate Good to go, Thanx a million. I would've eventually figured it out, "EVENTUALLY" But you saved me hours I believe Thanx again, I take it I can now flash the MK2 modem back, or is it ok to stau on MDC, Because Im now gonna flash the Stockishv06 rom?
[Sprint Samsung Galaxy S 4 General] maurogg84:
I don't know about that build, I did the unlocked with the TW NG2 version. I do remember it was very slow to use the dial pad, I had to try several times to dial the codes. If you do everything exactly like in the guide you should be able to get it right. The build prop lines can be added anywhere. It doesn't matter. When you reboot the phone go to Settings, more networks, mobile networks, network mode and select WCDMA only to save on battery, WCDMA /GSM auto works as well . I would also recommend flashing back the old modem since a lot of things break for downgrading the modem, maybe that's why you can't save apn settings.

Sent from my SPH-L720

---------- Post added at 12:12 AM ---------- Previous post was at 12:08 AM ----------

Basically what I did was, downgrade modem, did the international unlock , domestic unlock, revert back the new modem, rooted the ROM, added the build prop lines, added the APN settings, rebooted, selected WCDMA only, rebooted, went to the cricket store and got me a SIM card.

Sent from my SPH-L720
[Sprint Samsung Galaxy S 4 General] ciabatoni:
Im golden, Everything is working as it should, Last question, I wanna flash the stockishv06 rom, should I flash back to my MK2 MODEM, Im pretty sure once I flash the rom Ill have to flash the "UNKNOWNFORCE" modem, I just dont wanna lose or have anything revert the settings. Do you recommend anything, Or any DONT DUE'S

Ohh, And I didnt change anything as far as adding APN, the Apn sets, I was using just wouldnt take, but your recommendation took the first time, Im gonna flash back to MK2 and do my rom, And Ill report back if it dont stick...Fingers Crossed, LOL
[Sprint Samsung Galaxy S 4 General] maurogg84:
You can flash back to just your modern, and flash any ROM. If you flash a stock ROM, don't forget to add the lines to the build prop.

Sent from my SPH-L720
[Sprint Samsung Galaxy S 4 General] ciabatoni:
Wait a MINUTE, Now im confused. Bc I added those lines, But then the Dialer codes werent working anymore, So I deleted the lines I added, and the dialer codes worked again on the first shot, So It led me to believe the codes werent working bc of those added lines to the BuildProp. And what is NG2, I thought the latest was NAE. Is NG2 newer the NAE or is it a custom build. Forgive me, I stuck with MK2 and was happy with how my S4 was, so I may not be up2date with the latest Builds
[Sprint Samsung Galaxy S 4 General] maurogg84:
NG2 is the newest, the lines help basically to have all the options in network mode, if they are showing for you without lines, then you don't need the lines. You could update to the newest tw build, but you may have to repeat the unlock I think.

Sent from my SPH-L720

---------- Post added at 01:03 AM ---------- Previous post was at 12:51 AM ----------

I'm using also Google voice lite and hangouts with my cricket number. I have everything in the hangouts app, didn't like cricket voicemail app.

Sent from my SPH-L720
[Sprint Samsung Galaxy S 4 General] ciabatoni:
Ill have to check the new TW build out, Besides that everything is in order on my side, as long as Voice,Txt,Mms,and Data work, I think Im gonna leave it, But it does make me curious though, Im gonna add the lines to the Prop onemore time and see if it disables my dialer codes again, If it doesnt then I dont know what did, But for now, I gotta hit the Hay, Long day tomorrow. Thanx a lot, you have been a Gr8 Help. I really appreciate all you have answered for me. Drop back by tomorrow.

---------- Post added at 01:47 AM ---------- Previous post was at 01:27 AM ----------

Yeah, I just added the buildprop lines again and it disables my ability to enter dialer codes. Maybe its bc I originally went into efs/carrier/hiddenmenu and changed the file from Off to On, Who knows why the lines are doing it, but It does disable my dialer codes,
[Sprint Samsung Galaxy S 4 General] maurogg84:
If you can access the network modes you need, you don't really need the lines. I only needed the dialing codes for the unlock.

Sent from my SPH-L720
[Sprint Samsung Galaxy S 4 General] ecs87:
Repeating the unlock after a update isn't necessary. Even with using Odin. The nv items (where the lock is contained) are only wiped when you manually erase them through ADB shell, when you do a RTN or SCRTN, or when the modem decides to kick the bucket.
[Sprint Samsung Galaxy S 4 General] camry89:
Followed this guide exactly to the letter for 4 different customers L720's, NONE of them have been able to get H+ with T-Mobile, AT&T, or StraightTalk.... I ALWAYS just have to show them that voice and texts are working, and hope they don't notice the "E" for Edge/2G........ Don't understand what I'm doing wrong since I've done it multiple times taking my time and following each step exactly. When they text me later asking about it I have no choice but to lie and say the Sprint phone isn't capable of using the other 3g/wcdma bands..... :\

Selecting WCDMA All results in no bars and a red x

When I change to GSM All and reboot, there's instantly service............ 2G

Even told one person E meant Excellent :D

Then again, shops charge $70 to do it here, and I've hooked them up for $25
[Sprint Samsung Galaxy S 4 General] maurogg84:
Did you check their coverage? If they have H+ coverage then you missed something, did you use the correct APN settings? Did you flash back the correct modem? Sometimes keeping MDC installed break a lot things, like my WiFi and sound didn't work while I was doing the unlock.

Sent from my SPH-L720
[Sprint Samsung Galaxy S 4 General] camry89:
Yes checked the APN settings for the AT&T and T-Mobile sims, not the straighttalk one. MDC didn't break sound or wifi (didn't touch NON-HLOS.bin which would be responsible for this), but from reading the posts in this thread not everybody is flashing back the updated modems. Having trouble believing I missed something, these phones were all a month apart, I took my time following each step doing exactly what it said...

Most I can get out of them is 2G Edge :(

Soon as I change from WCDMA_ALL to GSM_ALL it works...
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
Easy answer. T-Mobile hasn't enabled 1900 MHz HSPA+ in your area, so 1900 still belongs to Edge. It'll be that way until they update
[Sprint Samsung Galaxy S 4 General] camry89:
I've unlocked multiple other AT&T phones to work with T-Mobile and H+ works just fine in the area, haven't tested specific bands.... doesn't seem to matter what carrier they want to use, WCDMA_ALL gives the no bars and red x
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
I've unlocked dozens of L720's and never had that issue. You're doing something wrong.
[Sprint Samsung Galaxy S 4 General] ecs87:
Agreed.
[Sprint Samsung Galaxy S 4 General] ciabatoni:
check

I did one for someone today and everything was good besides this problem here, theres was outdated, Worth a look http://www.att.com/esupport/article.jsp?sid=KB424489&cv=820#fbid=kx8PBQjxTph
[Sprint Samsung Galaxy S 4 General] lisac2100:
so i have a sprint s4 carrier unlocked running a tmobile 4.4.2 custom gummy rom ( mdc ) w a straightalk sim. i can send/recieve text just fine, use the net. and place calls, all with no issues. i can not however recieve any calls. my phone does not ring on my end. has anyone experienced this issue and have a solution?
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
go back to stock rom
[Sprint Samsung Galaxy S 4 General] lisac2100:
so i would go to stock sprint rom and use that with the straight talk??
[Sprint Samsung Galaxy S 4 General] ecs87:
EXACTLY! The unlocks are enough of a hack...now people want to throw a custom ROM on top of it?! That's just asking for trouble (unless it was made by a dev suited to this particular device and scenario).
[Sprint Samsung Galaxy S 4 General] daniel4653:
Ive been running custom Roms OK my gs4 since I unlocked it about 3 months ago . from sacs ROM to negaman, hyperdrive, aokp, paranoid android, slim ROM, etc.
[Sprint Samsung Galaxy S 4 General] ecs87:
I've heard of too many issues from other users on custom ROMs. Maybe you need to write a tutorial on how to properly flash a custom ROM lol.
[Sprint Samsung Galaxy S 4 General] daniel4653:
Lol honestly I do nothing special.
[Sprint Samsung Galaxy S 4 General] lisac2100:
can anyone thats on straight talk or tmobile post a modem and kernel so that i can flash those with stock and/or custom rom to see if maybe one of those 2 things are the problem?
[Sprint Samsung Galaxy S 4 General] maurogg84:
You said you have a 4.4.2 Rom, is that aosp or a modified stock? What's your build number? As far as I know, some modems don't work well with different builds that have different firmwares. If your build is NAE, flash the NAE modem to see if that fixes the problem, and also the NAE kernel if you are stock. You'll have to look that up.

Sent from my SPH-L720