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[Q] HELP!Nexus s locked on one provider?!?

Hello everyone...
I have a "little" problem.
In my country there is 5 providers(Tele2,BonBon,Vip,Tomato,Simpa).My Nexus s was unlocked on all of them providers.But i was installing a new rom on my Nexus s,and my VIP card(provider) was in the phone while i was doing that.When i putted a new rom,suddenly Nexus s was locked on that provider(VIP) which was inside of the phone?I tried to reinstall and installed a new rom and nothing,i cant get it to unlock on that just one provider(VIP).Phone is now unlocked on all providers(Tele2,BonBon,Tomato,Simpa),but it isn't on VIP?Did someone had a similiar problem,and could you please help me?I would be very grateful!!!

GSM Nexus S are all unlocked.
Sent from my Nexus S using XDA App

Feeshie said:
GSM Nexus S are all unlocked.
Sent from my Nexus S using XDA App
Click to expand...
Click to collapse
I see you don't understand me...Nexus s WAS unlocked,but when i installed a new rom,phone got locked on one provider(VIP)which was in the phone while i was installing the new rom...

Anyone?!?Please!
Sent from my Nexus S using XDA App

mimi12 said:
Anyone?!?Please!
Sent from my Nexus S using XDA App
Click to expand...
Click to collapse
Device locking is done in the operating system, not the physical device. I have yet to see a custom ROM or ASOP to be sim locked.
Now keep in mind, the phone won't show APN's for other networks when you insert your SIM card. What is going on here is the device is reading your sim card to identify the provider then set the proper APN as default. To test if it's unlocked, try a different SIM in the device and see what happens.
Edit: I'm assuming you are talking about a SIM lock. If it's a lock of some other sort, please provide more details with EXACTLY what is going on.

Matridom said:
Device locking is done in the operating system, not the physical device. I have yet to see a custom ROM or ASOP to be sim locked.
Now keep in mind, the phone won't show APN's for other networks when you insert your SIM card. What is going on here is the device is reading your sim card to identify the provider then set the proper APN as default. To test if it's unlocked, try a different SIM in the device and see what happens.
Edit: I'm assuming you are talking about a SIM lock. If it's a lock of some other sort, please provide more details with EXACTLY what is going on.
Click to expand...
Click to collapse
Hello,first i want to thank you for your help.
My phone is unlocked for all providers except one provider(VIP).When i put (VIP) sim card,it says "emergency call only".I tried to Restore default APN,but when i press that it just says "Restoring default APN networks",after a while,it says it is completed,but still there it says"emergency call only".If i try to call anyone,it says Mobile network not available.When i go to "About Phone" menu,then "Status" it says:
Network-Unknown
Service state-Out of service
Roaming-Not roaming
Mobile network state-Disconnected
Other informations:
Model number-Nexus s
Android version-2.3.6
Baseband version-I9020AUCKF1
Build number-GRK39F
So this is it,my phone is locked to only one provider(VIP),if i put any other sim card provider(Tele2,BonBon,Tmobile...)the phone is working well,i can call anyone,text etc.Thank you in fowards...

mimi12 said:
Hello,first i want to thank you for your help.
My phone is unlocked for all providers except one provider(VIP).When i put (VIP) sim card,it says "emergency call only".I tried to Restore default APN,but when i press that it just says "Restoring default APN networks",after a while,it says it is completed,but still there it says"emergency call only".If i try to call anyone,it says Mobile network not available.When i go to "About Phone" menu,then "Status" it says:
Network-Unknown
Service state-Out of service
Roaming-Not roaming
Mobile network state-Disconnected
Other informations:
Model number-Nexus s
Android version-2.3.6
Baseband version-I9020AUCKF1
Build number-GRK39F
So this is it,my phone is locked to only one provider(VIP),if i put any other sim card provider(Tele2,BonBon,Tmobile...)the phone is working well,i can call anyone,text etc.Thank you in fowards...
Click to expand...
Click to collapse
This is NOT a sim lock. What is going on is that your phone has lost it's APN settings or is using the wrong modem. a sim lock means that your phone will only work with 1 provider, installing the SIM from a different provider will give you an error message similar to this: ‘SIM not valid’, ‘SIM locked’ or ‘SIM not accepted’
Since the phone is working on other providers, i would believe that the phone has lost it's APN settings for VIP. I would look up the APN settings for VIP and manually put them into the phone and go from there.
A quick search found a thread with the APN settings:
http://forum.xda-developers.com/showthread.php?t=679892
Good luck.

Hello again and once again thank you.I tried what you said for APN,but it didn't work.Is there anything else?!?
Sent from my Nexus S using XDA App

Try to flash another Radio. I never had luck with KF1, and quite frankly it kept me from getting any service at all for like 2-3 reboots after.
Try KD1, or KB3 (those work for me).
Reboot a few times, and see if it works.

stuff said:
Try to flash another Radio. I never had luck with KF1, and quite frankly it kept me from getting any service at all for like 2-3 reboots after.
Try KD1, or KB3 (those work for me).
Reboot a few times, and see if it works.
Click to expand...
Click to collapse
Thank you,i flash to KD1,after that i put Tmobile card and turned it on,and emergency call,my thoughts were "OMFG what have i done!?"After that i thought i will reboot it and see how it goes.I put him i fastboot mode and then rebooted him,and i got signal.After that i did it the sam with VIP card,and now is working like charm.Once again thank you for trying to help me with my problem,i am very grateful!

job well done....case closed
Sent from my Nexus S 4G using XDA App

Unable to use my Nexus S
Matridom said:
This is NOT a sim lock. What is going on is that your phone has lost it's APN settings or is using the wrong modem. a sim lock means that your phone will only work with 1 provider, installing the SIM from a different provider will give you an error message similar to this: ‘SIM not valid’, ‘SIM locked’ or ‘SIM not accepted’
Since the phone is working on other providers, i would believe that the phone has lost it's APN settings for VIP. I would look up the APN settings for VIP and manually put them into the phone and go from there.
A quick search found a thread with the APN settings:
http://forum.xda-developers.com/showthread.php?t=679892
Good luck.
Click to expand...
Click to collapse
Hi,
I am facing a similar issue. My Nexus S is running on 4.0.3 with baseband version I9023XXKI1 (Got it in UK, unable to use it in India). No matter what SIM I insert it stays in Out of service mode. Can you please suggest which Radio version I can flash to get rid of this issue? Please help!!

Hi, check this thread, it may help you:
http://forum.xda-developers.com/showpost.php?p=11686273&postcount=14

[Q] No connectivity at all

Hi guys
So I have the 23rd december version of Cataclysm installed, ElementalX kernel latest and I also flashed the 5.0.1 nexus 5 radio. Everything was working smooth for a day or 2 (no problems at all, I love Cataclysm). When I was on the train yesterday my connection (2g, 3g, 4g, everything) fell away as usual on Belgian trains in some areas, but it didn't come back... Now I'm stuck with a nexus that only has wifi... Does anyone know what to do? I have never seen this before so I'm clueless

I have tried installing other radio's. With the KitKat one, it didn't even find my SIM-card(no PIN login whatsoever)(this is also not a SIM related issue because I tried other phones). When I flashed the one from 5.0.1 back, it was the same issue all over again. I tried using * # * # 4 6 3 6 # * # * but it says my radio is off, gprs service too. network type unknown...When I try to turn the radio on via the button in the menu, nothing happens...
I did a full wipe in TWRP, installed cataclysm and elementalX again and again:nothing...

Do you have an IMEI in Settings > About Phone > Status, or is incorrectly at 0?

Lethargy said:
Do you have an IMEI in Settings > About Phone > Status, or is incorrectly at 0?
Click to expand...
Click to collapse
There is an IMEI, 15 numbers!

gimmethatenergy said:
There is an IMEI, 15 numbers!
Click to expand...
Click to collapse
What should I do?

check if phone can make emergency calls, then you will know if there's radio or sim card detecting problem

RolF2 said:
check if phone can make emergency calls, then you will know if there's radio or sim card detecting problem
Click to expand...
Click to collapse
I can't...

gimmethatenergy said:
I can't...
Click to expand...
Click to collapse
Does it register the SIM? Have you tried putting your SIM in a friend's phone/putting your friend's SIM in your phone?

Lethargy said:
Does it register the SIM? Have you tried putting your SIM in a friend's phone/putting your friend's SIM in your phone?
Click to expand...
Click to collapse
It does register the SIM. When i put it in another phone, it works just fine
Yesterday, my IMEI and smallband were gone. I did a full restore to stock (root gone and locked). The IMEI and the smallband are back but the problem is not.
When I do the *#*#4636#*#*, it says the radio is off... I cannot push the button to turn it on, nothing happens.
thanks for the help so far, when the problem isn't resolved by tuesday I'm RMA'ing the device. but I'd rather not

gimmethatenergy said:
It does register the SIM. When i put it in another phone, it works just fine
Yesterday, my IMEI and smallband were gone. I did a full restore to stock (root gone and locked). The IMEI and the smallband are back but the problem is not.
When I do the *#*#4636#*#*, it says the radio is off... I cannot push the button to turn it on, nothing happens.
thanks for the help so far, when the problem isn't resolved by tuesday I'm RMA'ing the device. but I'd rather not
Click to expand...
Click to collapse
If the SIM is fine and it doesn't work on stock, then its likely a hardware issue, so I'd just go with the RMA.

Sprint G flex 2(LS996) GSM (DOMESTIC) Unlock [Guide]

I'm not responsible if this damages your phone, attempt at your own risk.
Hi everyone, I have stumbled upon what appears to be a working unlock solution for the G flex 2 (LS996). This is essentially a similar method of unlocking the g3, but with my unlocked by sprint node.db files. Currently MMS and Calling are not working for me on ATT, but data (LTE) and texting works. I beleive I know why calling is not working, as well as MMS, but I am not sure how to fix it, I am new to unlocking using root. Anyways, on to the guide.
First you will need to root your G Flex 2
You will also need Root Browser
Now after you have rooted download the files attached to this post
Next transfer the files to your phone if you did not download on your flex2
*Back up your node.db and node.db-library by adding .bak to the end in /carrier/apps
Once the files you downloaded are on your phone extract them to /carrier/apps
Now restart your phone with your non sprint sim card, or sprint if you are unlocking for future use
When the phone boots you should see that it is recognized, but the carrier still identifies as sprint
Go into settings, more, set mode to global, then go to apn settings and add in your apn
Now you should have full sms and data
This is as far as I have got at the moment, but I am working on calling and mms on at&t, it did appear to be working on Verizon though
Now to where I need some help:
First is calling. I think I have identified the 2 things that may be causing the problems. First is call barring, when I opened up a hidden phone menu it said that incoming, outgoing, etc calls were locked. When I try to enter that submenu to unlock them it says something about the sim or crashes. Next is hd calling. When I dial a number there is a hd symbol next to dialing, I don't know what that is, but if it is sending the call over data I am assuming that there is some type of problem with it sending it to a sprint server or something. If someone can help me figure this out I will be very thankful.
My next problem is MMS, on at&T. Whenever I try to send or download one it does not work. I might just have messed up my apn a few times but I doubt it. The MMS settings in hidden menus show up with sprint settings, and I have tried changing them but they just revert. Could anyone help me out?
PS Sorry about adding two files the first one did not show up when I posted and now I don't know how to remove

I am getting hands free activation now and then please help.Tried everything below.
iginally Posted by tomtam
Try this..
with root explorer : Go to system/app or /system/priv-app folder.
Locate Sprintsyncml. Apk
Rename it to Sprintsyncml. Bak
or
Search for OmaDmclient.apk, then click and hold the file till it popups a secondary menu, in secondary menu select RENAME.
Rename OmaDmclient.apk to OmaDmclient.apk.bak and press ok.
or
LGstartupwizard.apk... Which is located at
/system/priv-app
try this options it should work..it will disable the prompt
Thanks only found LGstartupwizard.apk but it is still popping up after rename..Please help

jmar896 said:
I'm not responsible if this damages your phone, attempt at your own risk.
Hi everyone, I have stumbled upon what appears to be a working unlock solution for the G flex 2 (LS996). This is essentially a similar method of unlocking the g3, but with my unlocked by sprint node.db files. Currently MMS and Calling are not working for me on ATT, but data (LTE) and texting works. I beleive I know why calling is not working, as well as MMS, but I am not sure how to fix it, I am new to unlocking using root. Anyways, on to the guide.
First you will need to root your G Flex 2
You will also need Root Browser
Now after you have rooted download the files attached to this post
Next transfer the files to your phone if you did not download on your flex2
*Back up your node.db and node.db-library by adding .bak to the end in /carrier/apps
Once the files you downloaded are on your phone extract them to /carrier/apps
Now restart your phone with your non sprint sim card, or sprint if you are unlocking for future use
When the phone boots you should see that it is recognized, but the carrier still identifies as sprint
Go into settings, more, set mode to global, then go to apn settings and add in your apn
Now you should have full sms and data
This is as far as I have got at the moment, but I am working on calling and mms on at&t, it did appear to be working on Verizon though
Now to where I need some help:
First is calling. I think I have identified the 2 things that may be causing the problems. First is call barring, when I opened up a hidden phone menu it said that incoming, outgoing, etc calls were locked. When I try to enter that submenu to unlock them it says something about the sim or crashes. Next is hd calling. When I dial a number there is a hd symbol next to dialing, I don't know what that is, but if it is sending the call over data I am assuming that there is some type of problem with it sending it to a sprint server or something. If someone can help me figure this out I will be very thankful.
My next problem is MMS, on at&T. Whenever I try to send or download one it does not work. I might just have messed up my apn a few times but I doubt it. The MMS settings in hidden menus show up with sprint settings, and I have tried changing them but they just revert. Could anyone help me out?
PS Sorry about adding two files the first one did not show up when I posted and now I don't know how to remove
Click to expand...
Click to collapse
first thanks for your effort!! second have you made any progress on gettin at&t working specifically talk and txt?

has any kind of progess been made yet? i suppose with a locked bootloader were gonna hit dead ends

T-mobile US with LTE Data Working
sooo i after this unlock and 2 more from the lg g3. I tried this one again I had no signal now I set it to global mode i got signal bars and its say sprint at the lock screen but in settings it says t-mobile
Text Works
Data works
LTE Data Super Fast
But no phone calling cant dial out phone app will crash and all the signal will disappear

Try dialing with 1 then area code

this is for domestic right? but for international unlock only need to change the files and it will work?

carlosirai said:
this is for domestic right? but for international unlock only need to change the files and it will work?
Click to expand...
Click to collapse
Yes that's true. Take care about permissions setup, use root explorer for that purpose. In three countries I use this phone LTE works mostly in bands 4, I also enabled that band using a guide I found here.

AndroidKing said:
sooo i after this unlock and 2 more from the lg g3. I tried this one again I had no signal now I set it to global mode i got signal bars and its say sprint at the lock screen but in settings it says t-mobile
Text Works
Data works
LTE Data Super Fast
But no phone calling cant dial out phone app will crash and all the signal will disappear
Click to expand...
Click to collapse
try downloading a dialer app from play store and see if that works..please leave feedback

i can unlock but not free^
---------- Post added at 09:32 AM ---------- Previous post was at 09:32 AM ----------
i can unlock but not free^
Fix full hands free activation

How's that?
tungkick said:
i can unlock but not free^
---------- Post added at 09:32 AM ---------- Previous post was at 09:32 AM ----------
i can unlock but not free^
Fix full hands free activation
Click to expand...
Click to collapse
I had the phone unlocked by sprint and can still not hook on to AT&T. What are you offering?

5.1.1 can unlock gsm sim too? Thank You

Changed my build.prof and got calling working flawless, just cant seem to be able to change apn settings.
ro.carrier=spr
ro.build.target_operator=spr
With this, you can also changed the spr to tmo if you want.
Anyone know how to make it so I can change apns?

matistight said:
Changed my build.prof and got calling working flawless, just cant seem to be able to change apn settings.
ro.carrier=spr
ro.build.target_operator=spr
With this, you can also changed the spr to tmo if you want.
Anyone know how to make it so I can change apns?
Click to expand...
Click to collapse
so in build prof did you change ro.carrier to spr or ro.carrier=spr?
have you tried for apn ##data#(##3282#)

dcasun said:
so in build prof did you change ro.carrier to spr or ro.carrier=spr?
have you tried for apn ##data#(##3282#)
Click to expand...
Click to collapse
When in the build.prof editor in Root Toolkit Lite, I simply changed it from "SPR" to "spr".
##data# isn't helping because I dont have the msl/spl. Everytime I go to change the APNs it wont allow me add one in. I can edit files if needed, I just need to be able to edit it haha

matistight said:
When in the build.prof editor in Root Toolkit Lite, I simply changed it from "SPR" to "spr".
##data# isn't helping because I dont have the msl/spl. Everytime I go to change the APNs it wont allow me add one in. I can edit files if needed, I just need to be able to edit it haha
Click to expand...
Click to collapse
What system version were you on?

ian577416 said:
I had the phone unlocked by sprint and can still not hook on to AT&T. What are you offering?
Click to expand...
Click to collapse
How much is it and will it be also international unlocked?

google~android said:
first thanks for your effort!! Second have you made any progress on gettin at&t working specifically talk and txt?
Click to expand...
Click to collapse
where did you find apn settings?
I see. After I flashed to zv8 they apeard. Didn't have any on zv6

carlosirai said:
this is for domestic right? but for international unlock only need to change the files and it will work?
Click to expand...
Click to collapse
@carlosirai, others,
can you help me a bit, as your post intrigued me as follows :
i bought this phone - rooted and unlocked as per method above by ebay seller for international usage.
currently, the phone is technically domestic unlocked and rooted on ZV6. this results in no OTA and node files for SPRINT modified!
as an internationsl user, who will not be using US Domestic providers or Sprint, can i unroot on ZV6? then upgrade to ZV9 then root as/if required and use with an international provider? this usage will be on 3G & LTE ( Bands can be enabled as required, post root )?
thanks in advance!
any help you

abhishek.banerjee said:
@carlosirai, others,
can you help me a bit, as your post intrigued me as follows :
i bought this phone - rooted and unlocked as per method above by ebay seller for international usage.
currently, the phone is technically domestic unlocked and rooted on ZV6. this results in no OTA and node files for SPRINT modified!
as an internationsl user, who will not be using US Domestic providers or Sprint, can i unroot on ZV6? then upgrade to ZV9 then root as/if required and use with an international provider? this usage will be on 3G & LTE ( Bands can be enabled as required, post root )?
thanks in advance!
any help you
Click to expand...
Click to collapse
Yes to all you said.
You need to flash stock zv6 system image and ota update to zv9, then root with zv9 rooted system image and do the "fixes"...

No GSM/Edge Connectivity .

We had a few hours network outage due to security reasons. But my G3 didnt recover when the outage was over and is still stuck at "no Service" even after several reboots, clean flash of cloudy and restoration to stock using nandroid. It was working just fine a night before. I have tried restoring Stock from nandroid but still no luck. I have tried different SIM cards too but still no connectivity.
*#06# shows proper IMEI number.
Baseband was shown as Unknown, So I flashed one from xda threads for D850 V10D. Now my Baseband is known. But no luck.
Wifi works fine.
Bluetooth works fine.
Sim Toolkit works fine
SIM contacts are visible
AAT tests USIM1 Passes
I am back to Stock using TOT method.
I even had a bit of luck and caught some signals last night but they came and Whooosh gone again never to return.
It is to be known that I am in Pakistan and D850 is ATT US. Do I need to take care of any unlocking to make it work here that the shopkeeper may already have done before selling it to me ? Because it worked fine before.
Edit::
I checked for unlock code. my phone says "Phone is not personalized". So i guess I am not operator locked.
Previously I had posted this in "G3 troubleshooting" forum assuming it to be cloudy ROM related but I think its much more serious than that. So posting it here in D850 Forum.

salimbaba said:
We had a few hours network outage due to security reasons. But my G3 didnt recover when the outage was over and is still stuck at "no Service" even after several reboots, clean flash of cloudy and restoration to stock using nandroid. It was working just fine a night before. I have tried restoring Stock from nandroid but still no luck. I have tried different SIM cards too but still no connectivity.
*#06# shows proper IMEI number.
Baseband was shown as Unknown, So I flashed one from xda threads for D850 V10D. Now my Baseband is known. But no luck.
Wifi works fine.
Bluetooth works fine.
Sim Toolkit works fine
SIM contacts are visible
AAT tests USIM1 Passes
I am back to Stock using TOT method.
I even had a bit of luck and caught some signals last night but they came and Whooosh gone again never to return.
It is to be known that I am in Pakistan and D850 is ATT US. Do I need to take care of any unlocking to make it work here that the shopkeeper may already have done before selling it to me ? Because it worked fine before.
Edit::
I checked for unlock code. my phone says "Phone is not personalized". So i guess I am not operator locked.
Previously I had posted this in "G3 troubleshooting" forum assuming it to be cloudy ROM related but I think its much more serious than that. So posting it here in D850 Forum.
Click to expand...
Click to collapse
Make sure your network settings are set correctly. Gsm/wcdma/LTE.
Sent from my iPhone using Tapatalk

hyelton said:
Make sure your network settings are set correctly. Gsm/wcdma/LTE.
Sent from my iPhone using Tapatalk
Click to expand...
Click to collapse
Yes. they are correct.

Almost sounds like a carrier network issue. Did they change frequencies?
Sent from my SAMSUNG-SGH-I747 using Tapatalk

hyelton said:
Make sure your network settings are set correctly. Gsm/wcdma/LTE.
Sent from my iPhone using Tapatalk
Click to expand...
Click to collapse
So i had my phone fixed. The guy said he replaced antenna multiplexer ic which did the trick.
My phone is back to att stock v10d. Here are baseband and build number Baseband
Baseband
Mpss.di.2.0.1.c1.13-00009-m8974aaaaaanpzm-1
Build; kvt49l.d85010d
Can you verify these numbers please.
Secondly my setting for preferred network mode arw missing now. How to re enable that.

salimbaba said:
So i had my phone fixed. The guy said he replaced antenna multiplexer ic which did the trick.
My phone is back to att stock v10d. Here are baseband and build number Baseband
Baseband
Mpss.di.2.0.1.c1.13-00009-m8974aaaaaanpzm-1
Build; kvt49l.d85010d
Can you verify these numbers please.
Secondly my setting for preferred network mode arw missing now. How to re enable that.
Click to expand...
Click to collapse
If your running stock firmware you don't have access to network modes on AT&T
Sent from my iPhone using Tapatalk

Note 5 SM-920P bought in China

I bought a Note 5 which worked fine with China Unicom, the phone was 5.1.1 so I decided to manually update the phone to mm. After the update the phone can make calls, but it can't pick up data signal. I've tried everything from flashing the modem back to 5.1.1 (which was the one that worked, originally) but no dice. I was wondering if anyone had a solution to this. The phone isn't rooted and its constantly trying to activate its voice and data, even though the voice all ready works.

Enter the APN settings manually for your network. The same happened to me on my Unlocked N920P. I entered the APN (Airtel India) and deleted all the others. On upgrading, it will automatically pick up the Sprint APNs. So add a new APN and enter your setting for your network manually.

shantanil said:
Enter the APN settings manually for your network. The same happened to me on my Unlocked N920P. I entered the APN (Airtel India) and deleted all the others. On upgrading, it will automatically pick up the Sprint APNs. So add a new APN and enter your setting for your network manually.
Click to expand...
Click to collapse
Thanks so much for your response. I've tried this method, but still no dice :/

hi
NavaKing0208 said:
Thanks so much for your response. I've tried this method, but still no dice :/
Click to expand...
Click to collapse
Hello
I bought Note 5 920P from china I use this mobile in Turkey bu we have some problem with this phone
for exampe there is no data over notification panel. Now phnoe android 5.1 I send picture about version.
Now I want to update Android 6,1 Usa Sprint.
Please tell me Is it any problems?

NavaKing0208 said:
Thanks so much for your response. I've tried this method, but still no dice :/
Click to expand...
Click to collapse
It happened to me too. The first step was the APN. changed the APN manually on mine but still it seemed no data connection was active. On step two I discovered that even the data seems not active, in reality there was a data connection and everything was working, but the icon was not showing due to something missing in the Sprint's SystemUI data connection icons.
So, try to put your apn manually and try and check if there is a data connection, i.e. using the browser to navigate.
---------- Post added at 11:34 AM ---------- Previous post was at 11:26 AM ----------
aksa63 said:
Hello
I bought Note 5 920P from china I use this mobile in Turkey bu we have some problem with this phone
for exampe there is no data over notification panel. Now phnoe android 5.1 I send picture about version.
Now I want to update Android 6,1 Usa Sprint.
Please tell me Is it any problems?
Click to expand...
Click to collapse
Open the notification panel - touch the "down arrow" symbol on the upper right corner to show all the icons and look there must be the data connection icon you're looking for.
As for the update: Updated myself to MM and everything works fine with the exception of 4G. This is not something caused by the update but because the LTE-4G bands the phone works are not compatible. Check yourself @ willmyphonework.net

Flash pure GSM kind of roms.
First go to official MM by ODIN, root it,
Via TWRP, flash Lamlazy ROM or aurora rom which is compatible rom without sprint stuff.
Try this rom http://bbs.gfan.com/android-8394771-1-1.html
Download link pan.baidu.com/s/1c2JZgje PW kr10
I didn't try yet. but it says N920p supported. If u are on sprint, am not sure how it works.. but GSM should work well.
That V7 of Lamlazy can be found here -- thread http://forum.xda-developers.com/show...&postcount=153