[INFO][HOW TO] Sprint Galaxy S4 Sim Unlock (SPH-L720/jfltespr) ATT/TMOBILE

[jellomonster54994]

This is an unlock method, not ROM flash method.

So therefore....

1. Perform unlock method as per OP
2. Verify it works
3. Flash ROM
4. Profit

tried that
i flashed pacrom and it switched to sprint then it i odin back to stock and now the unlock just says emergency calls only
once i redid the unlock method it still wouldnt work
am i doing something wrong? :crying:

 

[lee714]

C:\Program Files (x86)\Minimal ADB and Fastboot>adb shell
shell@jfltespr:/ $ su
/system/bin/sh: su: not found
oadcast -a android.provider.Telephony.SECRET_C127|shell@jfltespr:/ $ am broadcast -a android.provider.Telephony.SECRET_Cider.Telephony.SECRET_CODE -d android_secret_code://27663368378 <
Broadcasting: Intent { act=android.provider.Telephony.SECRET_CODE dat=android_secret_code://27663368378 }
Broadcast completed: result=0

how come I see this, but no menu pops up on my phone?

edit: nvm, i needed to be rooted.

 

[manoman77]

Question about retaining unlock

Thanks to all for the info in this topic.

3 days ago I did not know what a ROM was. As of today (due to the info found on this forum) I have successfully unlocked a Galaxy S4. My plan is to now Flash CM 12. With the instructions I am working from to flash CM via TWRP it indicates that the system, data and cache should be wiped first. It is not clear to me where the unlock settings are stored so I wanted to know if wiping the system files, prior to flashing CM, will negatively affect the sim unlock settings?

 

[jellomonster54994]

[Fixed] rebuild nv and factory reset if unlock doesn't stick then try again starting in step with ssu.apk

Sent from my SPH-L720 using XDA Free mobile app

 

[eliah1]

I flashed NG2 modem on OD2 eveything is working but not the wifi anybody can help . Thks

 

[jellomonster54994]

im getting "your call can not be completed" have to reboot any fix?

 

[MistuhEvo]

im getting the same error, tried going doing everything over 20 times still no luck. i keep getting you are not authorized to make call. my number or provider doesnt show up in about phone either.

 

[drivers1492]

midly retarded here I had continually typed in the info in adb wrong. once done the correct way I am unlocked and online. TY much for your work

 

[jellomonster54994]

new unlock

has any one tried the new od2 unlock in the general forum? i can send the apks if needed just need to know if it works before i try still dont know if i odin the od2 if it will recognize it as an update or if everything will delete

 

[dfd00123]

i tried flashing rom and it fails says secure check fail:aboot can someone help?

 

[olgoz]

Dun, dun, DUN!

Did this to my sph-l720 which was sold to me as a boxed, suppos-ed brand-new, octa-core international S4 gt-9500...

Thank you, the instructions worked for me.

The yellow screen took ages and i even rebooted a couple of times due to impatience.

SU wanted to update while suggesting 'the device isn't fully rooted yet' so I did this through Play on wifi before running the installed SSU unlock app. Working on my network proper now and even updating to Lolipoop.

Pondering on whether or not to keep this phone...

cheers,

olgoz

 

[meeok2]

I flashed NG2 modem on OD2 eveything is working but not the wifi anybody can help . Thks

I'm having the same problem as dfd00123. Was able to successfully unlock on lollipop, everything is working, but NO WIFI. Won't turn on. Any help for this?
I tried installing the "hybrid" modem here: http://xdaforums.com/galaxy-s4-sprint/general/od2-domestic-unlock-t3116542
But still no wifi

 

[Crossvxm]

I'm having the same problem as dfd00123. Was able to successfully unlock on lollipop, everything is working, but NO WIFI. Won't turn on. Any help for this?
I tried installing the "hybrid" modem here: http://xdaforums.com/galaxy-s4-sprint/general/od2-domestic-unlock-t3116542
But still no wifi

I think it is related to the bootloader as well. I have been able to get wifi working on OD2 with the MDC modem at some points and other times I have failed after fully returning to stock and taking the Stagefright OTA update directly (I think its OH1) then trying to downgrade the modem.

As for T-Mobile, anyone reading this may be SOL. I think they are now rejecting older Sprint IMEIs or require it to be registered, not sure. My device picked up T-Mobile for about 5 minutes then refused to even find it when searching for available carriers to register on. Other carriers get bars just fine. And lastly, I see talk here about flashing CM roms, but not once have I gotten an AOSP rom to read anything but Sprint. I have tried flashing GSM variant's CM12.1 but it will keep the phone in a roaming state, and cause issues when flashing back to stock (still roaming and will be detected as whatever variant other than Sprint who's rom you flashed even after you flash to stock with the latest odin tar. You must first flash back to an older tar which I think I used either NG2 or NAE then flash the latest OD2 tar to fix it).

I don't think these threads are futurproof and it seems as if the further into the future we get, the less people will poke at these matters since the phone is already nearly 3 generations behind. As for the no T-Mobile issue, anybody who would like to help me reassure others that it may just be an issue I'm experiencing would be greatly appreciated. Things are starting to change in such manners that we can no longer doubt that carriers will catch on to the things being pulled off by developers tinkering with Sprint phones to get them working on domestic carriers. Although Sprint is now allowing domestic unlocks, it is not an easy task officially and I don't see people stopping their work arounds any time soon...

EDIT: About my last paragraph, I figured it out. Going with the old instructions where the domestic unlock was first originally posted, the OP states to set the bands to ALL, and how he did the same to the LTE band selection area. Once I hit ALL to LTE, it will refuse connection to T-Mobile. I tried retracing the whole process, and when I got to that part, I set the first option to ALL and it immediately got service. Once I touch the other two and set them to ALL, bye bye service. Weird, I followed his same instructions a year or two ago with other L720's and never had this issue. My only possible guess is that there are two revisions for the L720, or the Qualcomm chip in general on the L720, and no I'm not talking about the L720T, been there and the process is a little different and more annoying IMO. Perhaps this will help others who also had issues with TMO on other threads I have read?

 

[mattzeller]

I'm having the same problem as dfd00123. Was able to successfully unlock on lollipop, everything is working, but NO WIFI. Won't turn on. Any help for this?
I tried installing the "hybrid" modem here: http://xdaforums.com/galaxy-s4-sprint/general/od2-domestic-unlock-t3116542
But still no wifi

Have you tried the Aurora kernel, people who have problems turning WiFi on in TW ROMs have sucess with that kernel

 

[cmdba]

How do we restore the phone back to normal .. back to sprint/cdma/lte ? Thanks in advance.

 

[jellomonster54994]

rebuild NV in dialer and you'll be back in sprint

 

[cmdba]

I did this to test out a Straight Talk LTE AT&T sim and got an invalid sim message .. yes, i rebooted. I entered apn settings and it wouldnt save. So a no go for me.

 

[crkoa]

Thanks to the OP. I followed the directions and successfully unlocked my phone and have it working on AT&T. I am having a few issues however. I've installed the last stable build of CM12.1. I can make calls, use data and make/receive texts. The issues are:

1. I do not get notified of an incoming call and therefore cannot answer incoming calls.
2. When a voicemail is left for me, I do not get any notification that I have a voicemail.
3. When I make a call, I cannot disconnect from the call. The only time the call ends is when the other party disconnects. . When I press the end call button, it indicates that it is disconnecting, but doesn't.

Thank you for any assistance.

 

[jellomonster54994]

I am no longer following this anymore I'm on unlocked n900a trying to trade motherboard for an n900t but can not find one yet

 

[iBowToAndroid]

Thanks to the OP. I followed the directions and successfully unlocked my phone and have it working on AT&T. I am having a few issues however. I've installed the last stable build of CM12.1. I can make calls, use data and make/receive texts. The issues are:

1. I do not get notified of an incoming call and therefore cannot answer incoming calls.
2. When a voicemail is left for me, I do not get any notification that I have a voicemail.
3. When I make a call, I cannot disconnect from the call. The only time the call ends is when the other party disconnects. . When I press the end call button, it indicates that it is disconnecting, but doesn't.

Thank you for any assistance.

That's a known issue on CM. Google "CDMA cyanogenmod ril patch".

Or I believe flashing a GSM version of CM also fixes it