yashsingh1/xdaforums huggingface dataset:
[Sprint Samsung Galaxy S 4 General] klevismartini:
L520 hidden code work, invalid sim

Im able to access all the hidden menu with this guide.

I follow all the steps but after i reboot i got INVALID SIM, please someone have unlocked a L520 Sprint S4 mini??

please let me know who is >>>> twill1987<<<< as he write that was trying to unlock the s4 mini.

thanks to all.
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
The phone works with any GSM service once unlocked.

This guide is for the L720, not the L520
[Sprint Samsung Galaxy S 4 General] klevismartini:
yes, i know but all the steps works perfectly just it doesnt accept the sim,

so I thought that someone can help me and other people like me.

thanks
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
Just because the steps work, doesn't mean the end result is the same. Two completely different phones. The L520 does not have GSM and therefore cannot be unlocked.
[Sprint Samsung Galaxy S 4 General] klevismartini:
no, you wrong it has the gsm radio.

http://pdadb.net/index.php?m=specs&id=4933&c=samsung_sph-l520_galaxy_s4_mini_td-lte_samsung_serrano

http://www.gsmarena.com/samsung_i9190_galaxy_s4_mini-5375.php

i can access all gsm and umts network menu and the apn setting too, but its showing me the sim message.

so i think it can be unlocked just the moderators and mods doesnt mater.

:silly:
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
http://www.samsung.com/us/mobile/cell-phones/SPH-L520ZWASPR-specs

https://www.handsetdetection.com/properties/vendormodel/Samsung/SPH-l520

http://fccid.net/number.php?fcc=A3LSPHL520&id=240920

http://www.phonearena.com/phones/Samsung-Galaxy-S4-mini_id7788

http://www.phonescoop.com/phones/phone.php?p=4164&fs=a

https://wikidevi.com/wiki/Samsung_SPH-L520

....etc.
[Sprint Samsung Galaxy S 4 General] lclutchl:
I cannot extract those files it gives me an error

SPH-L720_MF9_Rooted_NoData_Restore(compressed archive).exe

Can some one post the extracted files or email them to me so i can continue or start because i cannot do it. I dont know why i am getting an error
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
Ugh. Ignore the OP. (Well, the first step anyway).

Read the thread
[Sprint Samsung Galaxy S 4 General] klevismartini:
i dont know man, i just look at the gsmarena and it shows that all models supports gsm and i bought it.

some sites shows gsm some other doesnt.

but for sure i can access gsm and 3g to network menu.
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
The GSM Arena link is showing Samsung's international version of the S4 Mini - not Sprint's version. The model numbers are all wrong and that link doesn't show any CDMA support, which the Sprint version obviously has.

The PDADB site lists the correct model, but is wrong.

Just because you see it in the software, doesn't mean the phone actually has a GSM-capable radio
[Sprint Samsung Galaxy S 4 General] lclutchl:
What do u mean i read the thread. All the instructions....

Do i not need to do that?

---------- Post added at 10:42 PM ---------- Previous post was at 10:24 PM ----------

MMs protocal is not an option I dont know why but i do not have that option will that effect how the unlock will turn out. I cannot do that setting in the apn. Can i add that setting in there? Mine says MJA also not mdc or mdl. Can i still do it? i read like 6 pages of the thread
[Sprint Samsung Galaxy S 4 General] daniel4653:
You need to be on MDC or MDL modem/baseband to perform the unlock.
[Sprint Samsung Galaxy S 4 General] steveokinevo:
So if I follow these steps i can call metro and activate it with them fully working? Just change apn settings? I'm already unlocked. Seems it's a pain in the ass to get this working with boost fully. Haven't had good luck
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
Downgrading to MF9 (first step in OP) is not needed nor recommended, and might not even be doable at this point.

If you follow these steps, the phone will be GSM unlocked and you can put a Metro SIM in and get full service on their GSM network. This will not assist you in getting it flashed to their CDMA network, which I wouldn't advise since it' being decommissioned anyways. Getting this phone to work with Boost is quite an easy process if you have all of the necessary items.
[Sprint Samsung Galaxy S 4 General] daniel4653:
True. It was pretty easy to get three GS4s on ATTs network via Cricket Wireless.
[Sprint Samsung Galaxy S 4 General] steveokinevo:
Help a brother out lol. I'll make a donation if it helps? I just haven't had the time to figure all this out
[Sprint Samsung Galaxy S 4 General] daniel4653:
There's nothing to it. Follow the guide. Pop in the s card. Add apns. Golden.
[Sprint Samsung Galaxy S 4 General] steveokinevo:
Got a link for these said guides? I've already had it active on boost. But only 4g and mms and calling. No 3g or vm
[Sprint Samsung Galaxy S 4 General] lclutchl:
Need help

I kinda cant make a call watch videos or use bluetooth. Can someone tell me how to fix this.. I would be able to make calls if the phone app would stay open. It crashes. I got att and tmobile working on this phone no data.

So 1 can someone tell me how to fix bluetooth, phone, music player, sound and watching videos,

2. How to enable date
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
This guide is for GSM unlocking. If you want to use it on Boost, look elsewhere. If you want it GSM unlocked, PM me.
[Sprint Samsung Galaxy S 4 General] sartaga:
How do I reverse this to default settings?

How do I reverse this to default settings?
[Sprint Samsung Galaxy S 4 General] daniel4653:
To work with sprint again while retaining the unlock? Or getting rid of the unlock.entirely?
[Sprint Samsung Galaxy S 4 General] sartaga:
The first would be nice. Or the later. I think I have the sprint working now as the SIM is being recognized again.
[Sprint Samsung Galaxy S 4 General] sartaga:
Failed. crap i need the default settings. Pretty please?
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
Should just be able to do ##SCRTN# and all the defaults should be put back
[Sprint Samsung Galaxy S 4 General] atoore:
Is there a way for lte to work in this phone with tmobile or metropcs if we changed the nv values to enable band 4? If anyone out there who is trying to get this to work, contact me because it might work if you enable the 1700/2100 and 1900/2100 bands with editing the nv values on the phone.
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
No. No other carrier uses the same LTE frequencies that Sprint does
[Sprint Samsung Galaxy S 4 General] hfl12:
How do I update prl after unlocked ? I'm on sprint stock rom and got error 407 when tried to update.
[Sprint Samsung Galaxy S 4 General] Jeff5672:
Does the wifi and ability to download still work after the phone is unlocked?
[Sprint Samsung Galaxy S 4 General] M1k3Carson1369:
Sometimes after downgrading the Modem to perform the unlock people have issues getting WiFi to turn on, etc. In which case the solution is as simple as flashing the Modem back to the version corresponding to your Build.

[So if you go from MK2 to MDC to unlock, then flash the MK2 modem back to the phone and all will be well again]
[Sprint Samsung Galaxy S 4 General] funziebear:
Hey guys so I did everything on here starting with international unlock , domestic unlock seems to have worked but my phone just gets stuck on searching for network , under about device I see imei and my phone number so I know it's reading my sim , what can cause the network search fail issue ? I Google and searched to Jo avail , TIA
[Sprint Samsung Galaxy S 4 General] daniel4653:
I never do the network search. I just go to APNs and manually put them in and the phone works.
[Sprint Samsung Galaxy S 4 General] ecs87:
It's probably blacklisted
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
It doesn't have full Sprint functionality after it's unlocked, so you don't want to unlock it until you're ready to use it on another carrier. To revert the unlock completely, dial ##72786# in the dialer and do the reset.

Likely blacklisted (lost or stolen). Can be fixed. Contact me if interested
[Sprint Samsung Galaxy S 4 General] funziebear:
Is there anywhere legit that i can check ?
[Sprint Samsung Galaxy S 4 General] M1k3Carson1369:
Swappa.com/esn

You can check status by running MEID/IMEI/ESN/etc. It's much more rrliable than any of the other sites that ive used or have heard of...
[Sprint Samsung Galaxy S 4 General] funziebear:
Ok i checked and it shows its clean but whats weird is that is giving me verizon stuff :/ im about ready to blow this phine up hahaha :p
[Sprint Samsung Galaxy S 4 General] alberto234:
Works! Only thing, ODIN in a Virtual Machine is not reliable

Wanna thank the OP and all those who have contributed to this thread. I was able to follow the instructions and successfully unlocked the SIM for use on T-Mobile.

I hope this saves someone some time when doing this. After a brief search, I see that there are several posts advising not to use ODIN in a Virtual Machine. I have a Mac and though I could do just that. I pulled my hair all weekend trying to figure out why I could flash a new recovery using ODIN but couldn't flash the modem. After sleeping for just a few hours for 2 days I tried a real machine and it was flawless. I wish I had searched earlier to know this wasn't a reliable option.

Another time-saver would have been if the OP had was updated to indicate that it was not necessary to flash the entire MF9 ROM for the process, especially as you can't downgrade the ROM. New instructions now just require you to flash the MDC modem. I know that the information was buried in this thread, but reading 100+ pages in a thread can be tough.

Gladly using my S4 on T-Mobile, and saving money.

Eyong
[Sprint Samsung Galaxy S 4 General] hfl12:
Hey thanks for answering my question. I'm using lycamobile on my unlocked s4 with stock rom. I don't have signal at some place that I think I should have signal. That is why I want to update the PRL. Can I update my the sprint PRL for lycamobile?
[Sprint Samsung Galaxy S 4 General] mastmaker:
Thanks, it works.

I took a working Sprint device (on a Sprint MVNO plan, but out of contract) and unlocked it to work on T-Mobile.

Only thing extra that I had to do was: The change described in step 5 had not taken effect. When you perform that step, the system warns you to reboot it. I had continued on to other steps and after a reboot, I had 'x' on the network signal. I performed this step again and rebooted once more to find I had both signal as well as data connection (with the APN pointing to fast.t-mobile.com).

I get HSPA+/HSPA connection with speeds up to 10Mbps. I love it because I can still slip back to Sprint MVNO anytime I want to. Best of both worlds!
[Sprint Samsung Galaxy S 4 General] funziebear:
Whos in socal and wants to help me , idk if im doing something wrong or if this phone is blacklisted :/ .
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
I'm pretty sure Lycamobile is GSM...? PRL is a CDMA-only function. Won't do anything for you on GSM

It could be. I'll check the IMEI for you if you PM me
[Sprint Samsung Galaxy S 4 General] dexter5:
MMS

Hello I have 2 s4 L720 One with the MJA and the other one With NAE. I downloaded the modem of both of them to MDC and got them both unlock and working with Tmobile. The one with MJA the mms works on it and the one with the NAE the mms does not work. I have read all of the post and cannot find a solution for the mms; except flashing to a tmobile rom, and using go sms app. I have read that flashing the tmobile rom; some people have problem with calling quality; etc. Let me know if I missed something. I also messed with apns-conf.xml; that was a dead end too.
[Sprint Samsung Galaxy S 4 General] middienewbie:
Hope for us all-XDA lead us to the promise land (again)

I tried to post this earlier today, but it didn't link. Since then, besides the fact that XDA developers have never led me wrong in my more junior attempts to root and flash, I had a screen repair done by a guy for $40 (I had the Iparts kit) that told me he could turn any phone in to type of phone. More proof for the pudding. I have navigated through threads to root an old S2 back in Cyan 9 days and flashed to practice, but as amazing as the initial post is, switching basebands and apn's, turning a CDMA in to a functioning GSM/UTMS with LTE is something I need to be baby stepped through if someone wouldn't mind. My situation is slightly different as well. I am comfortable enough with clockwork mod, twrp, and Odin that I can re-read posts if similar procedures are called for. Me:

Sprint Samsung Galaxy S4 SPH-720T MD release 1 v2 baseband PUBNG5...beginning with 720T...This is my active phone on sprint that I would like to move to TMobile-I have an S2 I can activate to clean the ESN. I bought a Tmobile sim that they activated at the store that has a # attached to it. prepaid. The guy there said that he did one, the person got the apn+baseband and then they ported number. My S4 is immaculate, I love it, and have no need for anything on the market until the note 4 +mega come out. I have a Sprint tablet that I am keeping and my phone is in good enough condition that it will fetch a great asking price even if they don't pay the 200 or so left on my etf. Sprints LTE is awful where I just moved, to an NJ suburb of NYC, but was great in Philly where I was before. TMOBILE operates on the 1900 baseband in my entire territory....I need to do this for work because camscanner leaves 2 MB files in my Outlook exchange box. XDA gods, if you can, please and and thank you
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
No can do.
[Sprint Samsung Galaxy S 4 General] OsmanMusa:
For the people experiencing the Red X issue, I found out that slim kat rom 8.0 allows you to select GSM and that will pick up full bars. red x doesn't mean imei block.
[Sprint Samsung Galaxy S 4 General] ecs87:
If you've followed the directions properly, you shouldn't ever get a red X IF you waited for the phone to register on GSM after unlocking. If you have a red X the phone is blacklisted, you didn't follow the steps correctly, or you were too impatient. I've done over 50 of these. Probably closer to 100. There's absolutely no reason for getting no signal after the intl and domestic unlock.
[Sprint Samsung Galaxy S 4 General] daniel4653:
I hope that doesn't mean that you are selling "unlocking services" on Craigslist or somewhere. I hate when people make money off of others with information that is absolutely free.
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
There's a ton of free information out there on the internet. Thousands of YouTube videos describing how to do mechanic work on your car, for example. But lots of people don't want to take the time to do the research into something that they view as difficult or complicated or unfamiliar, and risk doing something wrong. They would rather leave it up to a professional who has experience. And there's absolutely nothing wrong with that. I'll tell you right now that I profit off this thread. Hate me too if you want.
[Sprint Samsung Galaxy S 4 General] daniel4653:
I guess that's the "beauty" of democracy. Make a dollar doing anything.
[Sprint Samsung Galaxy S 4 General] OsmanMusa:
This stuff is plain Bizarre. I had my sprint s4 unlocked using ultra mobile using OP unlock method and then I wanted to get rid of that low quality static voice where I can't hear other person well so I did a modem clear reset ##72786# and did everything all over again. I flashed it with mdc unlocked it and still red X. But here is the weird part. H20 sim card shows full bars and connects just fine. I don't know if it is just ultra mobile but it sure works just fine with h20. It ain't blacklisted.

I also wanna add I was unlocking my friends sprint s4 when he got full bars and data before I even got to the LOL ril ro part where you use build prop so this stuff is weird man. I don't now anymore. How do people get rid of low quality voice cuz my friends had high quality voice calls and he can hear people well when I unlocked his but I can't with mine. Mine is newer than his too. Like brand new.
[Sprint Samsung Galaxy S 4 General] elpesao23:
Hi people which instructions should i follow to use my s4 L720 on metro my phone

is unlocked running m9
[Sprint Samsung Galaxy S 4 General] OsmanMusa:
I discovered that if I use SlimKat 8.0 ROM with the NG2 Modem, I will get clear calls all the time. Yay no more having to deal with being unable to hear people.:laugh:
[Sprint Samsung Galaxy S 4 General] ecs87:
You never mentioned doing the Domestic unlock part on your phone.

Also, are you and your friend on different carriers? Is your SIM card old? Are you two in different areas? These and many other factors come into play when voice quality, data type, and data speed are involved.
[Sprint Samsung Galaxy S 4 General] stunbozo:
used ##SCRTN#..... locked my sprint s4.

HI i accidently used the code ... it restarted my phone and locked the s4 stating invalid sim. how can i unlock the same... im on bb: L720VPUFNG2
[Sprint Samsung Galaxy S 4 General] iBowToAndroid:
Just repeat the process
[Sprint Samsung Galaxy S 4 General] stunbozo:
thanks....

already unlocked the same...... thanks for your reply. ....

cheers:cool:
[Sprint Samsung Galaxy S 4 General] TheGoodFellas:
Perfect until AOSP

All was working well with the unlock on my S4 until I decided to switch to AOSP. Now after going back to TouchWiz, all I see is a red "X" and [GSM: Limited] after trying the unlock again. I contacted sprint to make sure the phone isnt blacklisted and the imei is good. I am on MDC firmware and baseband and android 4.3. Any help in getting the phone working again is greatly appreciated. Thank you in advance.

I followed these steps:

---------- Post added at 05:37 AM ---------- Previous post was at 05:15 AM ----------

Would this work for the issue im having ? Any guides available?

Thanks
[Sprint Samsung Galaxy S 4 General] ecs87:
Perform the steps in the OP again but do NOT select GSM all or LTE all. ONLY select WCDMA all.
[Sprint Samsung Galaxy S 4 General] TheGoodFellas:
Thanks, I've tried this now and I see bars but its for sprints network. I have a atnt sim card inserted but I do not see Atnt or hear the call-service prompt when 611 is dialed.
[Sprint Samsung Galaxy S 4 General] ecs87:
You're not following the directions correctly. You can't skip over an entire section and expect it to work. Redo the instructions, EXACTLY as it's typed.
[Sprint Samsung Galaxy S 4 General] TheGoodFellas:
I just redid the whole process again. I haven't skipped any steps. From starting at // 5) Select CDMA, then 1.COMMON, press next page twice until you reach page three of COMMON and select 8.PREF MODE SET and select GSM_WCDMA_ONLY to # 12- WIFI that sonofa up and search for apn settings shortcut and build.prop editor in the Play Store. Go into the build.prop editor and add the following two lines://

Only see the red x.

would DFS be an option ?

---------- Post added at 11:00 PM ---------- Previous post was at 10:27 PM ----------

Anyone experienced the Red X symbol after performing the unlock?
[Sprint Samsung Galaxy S 4 General] ecs87:
The reason being that I didn't think you followed the directions at first is because I thought you set the network type to CDMA, hence saying it got signal and it's back on Sprint. I didn't mean CDMA, WCDMA is actually a thing; totally different. It can ONLY be set to WCDMA mode through the service menu. Not the network types in the normal settings. Again WCDMA has NOTHING to do with CDMA. It's the only way I've found to consistently get the phone to work properly on GSM AND get HSPA.
[Sprint Samsung Galaxy S 4 General] Roxisayshi:
I am also hearing static voice in one room of my house while in other room the audio quality is perfect. I thought that it's Tmobile signal problem. So I inserted my sim to another GSM phone and it works fine everywhere. This confirms that the problem is with unlocked phone and not signal. I am on NAE baseband. Can someone please help me on how to resolve this issue?
[Sprint Samsung Galaxy S 4 General] StifflerServices:
I apologize and know this isnt the thread for the question im asking however I am hoping that do to the simular end result, someone who had the Verizon S3 prior to the Sprint S4 could help me out. Will this work for the Verizon S3 (obviously need different Roms etc but any suggestions or links on how to do a domestic unlock for the Verizon S3. I have tried searching awhile back and cant seem to find the post that I saw about downgrading the baseband to unlock the SIM for the Ver. S3 just as this one does for the Sprint S4. I am tring to get full data (Not just EDGE) on a prepaid plan and currently we are using it on Straight Talk. Any help would be greatly appriciated. Thanks everyone
[Sprint Samsung Galaxy S 4 General] TheGoodFellas:
Unlocked NG2 confirmation?

Anyone successfully upgraded to NG2 modem & Android 4.4.2 Rom all while Keeping the Domestic unlock :confused: If yes, can you kindly post a steps guide for those of us looking to upgrade and maintain the unlock. Thanks in advance.
[Sprint Samsung Galaxy S 4 General] ecs87:
The unlock is in the nv items (efs data partitions). As far as I know these are not touched when upgrading or even when flashing a custom ROM. I'm on NG2. Ive successfully internationally unlocked on all versions and I'm 99% sure the domestic unlock works the exact same way (should you ever lose it, which you shouldn't unless you do something you shouldn't be doing in the first place).
[Sprint Samsung Galaxy S 4 General] maurogg84:
Did you unlock while using that modem, or did you have to downgrade? Is it possible to downgrade from NG2 to the old modems to do the unlock?

Sent from my SPH-L720
[Sprint Samsung Galaxy S 4 General] ecs87:
Its not possible to send QMI subsys commands on anything above MDC. I had to downgrade the modem to MDC for the international unlock to work. For the most part you can downgrade modems on all recent Sprint Samsung devices. What you can NOT do is downgrade the ENTIRE firmware build.
[Sprint Samsung Galaxy S 4 General] maurogg84:
Thanks for your help, one last question, can I straight flash MDC or do I have to do one modem at a time?

Sent from my SPH-L720
[Sprint Samsung Galaxy S 4 General] M1k3Carson1369:
You can flash MDC modem thru ODIN, regardless of your current Modem version.

Just be sure to FLASH THE MODEM ONLY... =p
[Sprint Samsung Galaxy S 4 General] maurogg84:
thank you very much for you help!

Sent from my SPH-L720
[Sprint Samsung Galaxy S 4 General] M1k3Carson1369:
My pleasure! =]

Remember that button ;]
[Sprint Samsung Galaxy S 4 General] daniel4653:
The ignore?
[Sprint Samsung Galaxy S 4 General] M1k3Carson1369:
Precisely >=P
[Sprint Samsung Galaxy S 4 General] Tekone:
Go into the build.prop editor and add the following two lines:

ril.sales_code=LOL

ro.csc.sales_code=LOL

What are the point to adding those line if T-mobile able to make call and received call? Is the APN is for T-mobile 4G data need? What about AT&T data setting?
[Sprint Samsung Galaxy S 4 General] daniel4653:
Ignore those directions if you are on a 4.4.2 rom as these were for enabling the editing of APNs.
[Sprint Samsung Galaxy S 4 General] Tekone:
Thanks for helpful reply. without adding those two lines on the build.prop editor, can it still get 3G or 4G? T-mobile prepaid plan don't ability to test on.

ril.sales_code=LOL

ro.csc.sales_code=LOL
[Sprint Samsung Galaxy S 4 General] ecs87:
Those directions are to enable the APN list/editor in the settings of the mobile networks on the phone. As the user above you has mentioned, if you're on a newer firmware, you can ignore it. Simply put, if you can see your APNs already just ignore it. If you don't see them...I dunno why you wouldn't just update (unless you're trying to stay Knox free).