Develop Bugs

no one is helping us unlocking the L520???

hi to all.
i bought a sprint S4 mini L520 with KK 4.4.2/ NE3 modem on ebay and i try to sim unlock it (internationally).
so, I follow this thread but i dont find the earliest modem for the L520
http://forum.xda-developers.com/showthread.php?t=2415587
I follow this other thread and i was able to access all the menu and i have done everything,
after that i can access network mode, apn setting, but still invalid sim.
http://forum.xda-developers.com/showthread.php?t=2530610&page=75
i try the region lock away after i rooted the phone but still invalid sim?
so moderators and senior members why we cant find previous modem for the s4 mini in my case L520???
on xda we have unlocked many other harder phones and not a S4 mini!!!
please help us find a solution
GOD BLESS ALL

The Sprint variant is a CDMA phone. I don't think it will work on GSM networks, if that's what you're trying to.

arco68 said:
The Sprint variant is a CDMA phone. I don't think it will work on GSM networks, if that's what you're trying to.
Click to expand...
Click to collapse
but verizone S4 mini is sdma too but it have the GSM radio too,
http://pdadb.net/index.php?m=specs&i...amsung_serrano
http://www.gsmarena.com/samsung_i919..._mini-5375.php
im looking to sim unlock the S4 mini L520 (sprint).
after i follow one of the unlocking guide i can access gsm,umts network setting, apn setting and many other settings.
so i think it just need a software like S4 L720 to unlock it.
i try the same software but shows DONE AND REBOOTS THE PHONE BUT THE PHONE SHOWS INVALID SIM.
BECAUSE THE SOFTWARE WORK WITH FIRST MODEMS NOT WITH THE LAST NE3 OF THE L520 BUT IM NOT FINDING ANY MODEM.

I'd be surprised if it's possible to get a GSM SIM to be recognized in a CDMA phone.
There are firmwares with old modem on sammobile, but unfortunately since the phone is already running kitkat, downgrading is impossible afaik.
http://www.sammobile.com/firmwares/1/?model=SPH-L520&pcode=0#firmware

arco68 said:
I'd be surprised if it's possible to get a GSM SIM to be recognized in a CDMA phone.
There are firmwares with old modem on sammobile, but unfortunately since the phone is already running kitkat, downgrading is impossible afaik.
http://www.sammobile.com/firmwares/1/?model=SPH-L520&pcode=0#firmware
Click to expand...
Click to collapse
but there is just the mk2,the phone was released on may 2013, so there is an older modem a think,
so i just flash the modem, maybe i can unlock it and than reflash the new modem again.

klevismartini said:
but there is just the mk2,the phone was released on may 2013, so there is an older modem a think,
so i just flash the modem, maybe i can unlock it and than reflash the new modem again.
Click to expand...
Click to collapse
Do you have any news about downgrading?

[Q] Unlock Samsung S3 SGH-i747M (possible???)

Hello everybody
I have a Samsung S3 SGH-i747M (from Canada) with 4.4.2 and version I747MVLUFNE6 which is locked. It asks for "SIM network unlock PIN".
Is there any way (I don't care for the warranty) to make it work with an other SIM? I am currently in Switzerland.
Thank you very much in advance!

No you'll have to either call the original carrier of the phone and request the code or pay for the unlock code.

pre4speed said:
No you'll have to either call the original carrier of the phone and request the code or pay for the unlock code.
Click to expand...
Click to collapse
Do you know a reliable site where I can ask for the code?

There's lots of them out there. Pretty sure eBay has some and you can judge by their feedback and ratings...can't think of any specific ones right now though.
Sent from my SAMSUNG-SGH-T999 using Tapatalk

pre4speed said:
No you'll have to either call the original carrier of the phone and request the code or pay for the unlock code.
Click to expand...
Click to collapse
The problem is that I don't know at which carrier belonged the phone and one page that I found,that doesn't require the carrier and I think read that is reliable (swiftunlock.com), does not include the i747m in the list.
Any ideas or any other sites?

Any that offer it for the I747M should work. Don't take my word for it though. Ask the vendor first.
Sent from my SAMSUNG-SGH-T999 using Tapatalk

All the sites that i found ask for the carrier which I don't know or to have the phone rooted and have a version lower than 4.1.1 which I don't .
Is there any way to find out at which carrier it belonged?
Or any other reliable solution?
Please... :crying:

Go yo swappa.com and check the imei. I think it shows the original carrier when it does the check.
Sent from my SAMSUNG-SGH-I747 using Tapatalk

grgkots said:
Hello everybody
I have a Samsung S3 SGH-i747M (from Canada) with 4.4.2 and version I747MVLUFNE6 which is locked. It asks for "SIM network unlock PIN".
Is there any way (I don't care for the warranty) to make it work with an other SIM? I am currently in Switzerland.
Thank you very much in advance!
Click to expand...
Click to collapse
I just unlocked my SGH-I747M(canada Rogers/Fido) by down-grading to 4.11 and using the info from this thread "How to Unlock Your Samsung Galaxy S3 & Note 2 (No Rooting)"

found this in t-mobile thread. might be worth a check
err on the side of kindness

mrmike7 said:
I just unlocked my SGH-I747M(canada Rogers/Fido) by down-grading to 4.11 and using the info from this thread "How to Unlock Your Samsung Galaxy S3 & Note 2 (No Rooting)"
Click to expand...
Click to collapse
Free method will not work unless the bootloader is from 4.1.2 or lower.

audit13 said:
Free method will not work unless the bootloader is from 4.1.2 or lower.
Click to expand...
Click to collapse
That maybe true.....but I do know it doesn't work with ICS or JB 4.1.2 because [4] NW Lock NV Data INITIALLIZ does not show in menu.

mrmike7 said:
That maybe true.....but I do know it doesn't work with ICS or JB 4.1.2 because [4] NW Lock NV Data INITIALLIZ does not show in menu.
Click to expand...
Click to collapse
Once you are on the 4.3 ot 4.4.2 bootloader, you cannot downgrade the bootloader and the 4.1.1 modem will not work on the 4.3 or 4.4.2 bootloader.
You must be on at least the 4.1.1 dialler and modem.

mrmike7 said:
I just unlocked my SGH-I747M(canada Rogers/Fido) by down-grading to 4.11 and using the info from this thread "How to Unlock Your Samsung Galaxy S3 & Note 2 (No Rooting)"
Click to expand...
Click to collapse
Hey, I also have a I747 on Rogers on 4.4.2. Im looking to downgrade it to 4.1.1 like you did so I can sim unlock it. What process did you use to downgrade? Was it this: http://www.sammobile.com/firmwares/download/8565/I747MVLDLK4_I747MOYADLK4_RWC.zip/
THanks.
---------- Post added at 01:54 PM ---------- Previous post was at 01:53 PM ----------
audit13 said:
Once you are on the 4.3 ot 4.4.2 bootloader, you cannot downgrade the bootloader and the 4.1.1 modem will not work on the 4.3 or 4.4.2 bootloader.
You must be on at least the 4.1.1 dialler and modem.
Click to expand...
Click to collapse
damnit, just saw this. Is there any way to downgrade to unlock the SIM? What about if im on a different ROM?

There is no free way to sim unlock your phone once you have the 4.3 or 4.4.2 bootloader on your phone.

How to know on which bootloader ( bootloader 4.4.2 or 4.3) I am coz I was able to install a custom rom on my SGH-I747M The rom is dirty unicorn android 5.1.1 lolipop rom so Can I downgrade coz if I remember correctly I upgraded from stock 4.1.1 so can I downgrade to stock 4.1.1 by downloading and injecting it via odin is it possible or will it hard brick my phone and can you give me way to confirm what bootloader I have ???

Boot into download mode and look at the screen. If you see anything about knox, it likely the bootloader can't be downgraded to 4.1.1.

audit13 said:
There is no free way to sim unlock your phone once you have the 4.3 or 4.4.2 bootloader on your phone.
Click to expand...
Click to collapse
Can you guide me that how to know which bootloader do you have i.e. do I have a 4.3 or 4.4.2 bootloader how would I know that? and also I do have a custom dirtyunicorn rom with 5.1.1 so is it possible for me to flash the 4.1.1 stock SGH-I747M rom to it and then unlock it and then again add my current rom and use it???

Download and install the Samsung phone info app from the play store, run it, and look at the last three characters of the bootloader. If it is mk3 or higher, the bootloader can't be downgraded.

sim unlock for sgh-i747m 4.4.2 working need confirmation
audit13 said:
There is no free way to sim unlock your phone once you have the 4.3 or 4.4.2 bootloader on your phone.
Click to expand...
Click to collapse
Not quite sure where to put this but I have just successfully sim unlocked a samsung galaxy s3 sgh-i747m on 4.4.2 .This is only prelimary but upon unlocking and inserting a Public Mobile sim I was able to text on a Canadian Rogers S3. No further testing has been done. I first rooted the phone using Kingoroot and then downloaded the phoneinfo app from play store. I then used the app to get to service menu.At first service menu is blank but I used menu ,then key input Q, then back, then key input 0000,then back and then service menu appears. Now I am doing this from memory and no longer have the phone or another one at the moment to confirm this and will update this as soon as I can. But to the best of my knowledge I first went to UMTS(1) ,thenDEBUG(1), then Phone Control(?), then Network Lock.. Perso-SHA256 was on(1) I set it to off (0). I then backed out of the menu and shut down phone.I inserted PM SIM in phone and booted up .Phone didnt ask for unlock code and shortly I had texting service with Public Mobile. I dont have voice or data to check those but cant seewhy they wouldnt work. Anyway can someone confirm this working.My steps may not be exact but if it worked for me it should work for others.

[Q] AT&T to T-MOBILE FLash ROM

Hi everyone,
Is there a way to flash the AT&T or any other Stock ROM to a T-mobile phone ?.
I'v tried ODIN (version 3.7, 3.8, 3.9 and 3.10) .and I can´t manage to get it flashed.
Tried by TWRP too, and it says thet the zip isnt good.
Thanks in advance.

Not directly, no.

dc/dc said:
Not directly, no.
Click to expand...
Click to collapse
You mean inderictly is it posible? (dont know how is inderectly ).

Yes, but it requires a seasoned developer to make the modifications necessary. I'm not sure why you'd want to do this though as the AT&T version is far more bloated.

dc/dc said:
Yes, but it requires a seasoned developer to make the modifications necessary. I'm not sure why you'd want to do this though as the AT&T version is far more bloated.
Click to expand...
Click to collapse
Thanks for your reply.
I absolutely have no that kind of skill.
Anyway, the real reason I came up with that idea is because I cant unlock my T-mobile phone, and I live outside the US.
I've heard and read that sim unlocks by code are having problems.

Unfortunately, flashing firmware will not aid you in unlocking. Have you already tried buying a code for your device?

dc/dc said:
Unfortunately, flashing firmware will not aid you in unlocking. Have you already tried buying a code for your device?
Click to expand...
Click to collapse
He said flashing a rom not firmware. Someone over in the s6 forums flashed a metro pcs rom and was able to unlock the tmobile s6.

dnkeyhnter said:
He said flashing a rom not firmware. Someone over in the s6 forums flashed a metro pcs rom and was able to unlock the tmobile s6.
Click to expand...
Click to collapse
ROM = Firmware. They're interchangeable terms. Also MetroPCS is owned by T-Mobile, so I don't see your point. Flashing software does not unlock the SIM card slot.

dc/dc said:
ROM = Firmware. They're interchangeable terms. Also MetroPCS is owned by T-Mobile, so I don't see your point. Flashing software does not unlock the SIM card slot.
Click to expand...
Click to collapse
My appologies, coming from HTC m8...
http://venomroms.com/rom-vs-firmware/

themrmind said:
Hi everyone,
Is there a way to flash the AT&T or any other Stock ROM to a T-mobile phone ?.
I'v tried ODIN (version 3.7, 3.8, 3.9 and 3.10) .and I can´t manage to get it flashed.
Tried by TWRP too, and it says thet the zip isnt good.
Thanks in advance.
Click to expand...
Click to collapse
yes you can flash metro pcs firmware via odin and unlock by code

noobsaibot34 said:
yes you can flash metro pcs firmware via odin and unlock by code
Click to expand...
Click to collapse
There is no MetroPCS firmware for the S6 Edge as they do not sell it.

my bad this works only on s6...didn't realize you had an Edge

Im living outside of usa .
I have flashed my t mobile s6 using metropcs and unlocked my s6 using a code purchased online.
I reflashed my t mobile software and its still unlocked.
Can i update to stock 5.1.1 using odin and have the device still unlocked .
Once phone unlock is done using a code is it a permanent unlock ?

younussm said:
Im living outside of usa .
I have flashed my t mobile s6 using metropcs and unlocked my s6 using a code purchased online.
I reflashed my t mobile software and its still unlocked.
Can i update to stock 5.1.1 using odin and have the device still unlocked .
Once phone unlock is done using a code is it a permanent unlock ?
Click to expand...
Click to collapse
which code did you ask for to unlock the sim, metroPCs(sm-g920T1) or T-mobile(sm-g920T)??, I asked for metroPCs(sm-g920T1) code and unlocked my T-mobile phone
did you updated to 5.1.1?? which T-mobile(5.1.1) or metroPCs(5.1.1) ?? did sim kept unlocked??
thank you

datrico89 said:
which code did you ask for to unlock the sim, metroPCs(sm-g920T1) or T-mobile(sm-g920T)??, I asked for metroPCs(sm-g920T1) code and unlocked my T-mobile phone
did you updated to 5.1.1?? which T-mobile(5.1.1) or metroPCs(5.1.1) ?? did sim kept unlocked??
thank you
Click to expand...
Click to collapse
Hello
I have a samsung s6 t mobile version .
Flashed the metro pcs to unlock the phone and reflashed the t mobile firmware .its still unlocked and at 5.0.1 .
Im still looking for answers if i upgrade my s6 to 5.1.1 will my phone will be unlocked .if you find any , do let me know .
Sent from samsung s6

younussm said:
Hello
I have a samsung s6 t mobile version .
Flashed the metro pcs to unlock the phone and reflashed the t mobile firmware .its still unlocked and at 5.0.1 .
Im still looking for answers if i upgrade my s6 to 5.1.1 will my phone will be unlocked .if you find any , do let me know .
Sent from samsung s6
Click to expand...
Click to collapse
Your phone was unlocked by code. It is permanent. It is not rom dependant. Just like you flashed a different rom than the metro pcs when you originally unlocked your phone, you can upgrade too.

Flash unbranded rom
I have an unlocked G920T (came locked from amazon, but unlocked easily via device unlock app preloaded)
Is there an unbranded firmware I can flash, even if its from a different variant?

Im also interested to know if i can flash a at&t firmware on my tmobile s6. Not for unlock but because the person i gave it to wants to use the ohone on at&t and feel like its an at&t phone. Whatever right? But can i do that? Or would it have to be a custom rom? Orignal firmware would be nice.

[Q] SGH-I747 with SGH-T999 (No-LTE) Bootloader. Can I Odin flash back to SGH-I747?

Hello everybody,
I have bricked my device once (SGH-I747 AT&T) by flashing wrong bootloader to my phone (It's a very noobish mistake, I know) and I had to pay someone to unbrick it by using a J-Tag but this person told me he was "unable to install SGH-i747 bootloaders" and now I'm unable to use LTE because I have a Non-LTE bootloader and modem. I've tried flashing T999L modems but no SIM card/IMEI recognized so I had to go back to T999 modem. The questions are:
Can I Odin flash SGH-I747 bootloader I747UCUEMJ2 without bricking my phone?
My phone is unlocked to use with any operator, will it remain unlocked after this?
My IMEI will be ok after this?
My phone information is:
Baseband: T999UVUEMJC
Bootloader: T999UVUEMJC
Android Version: Lineage 7.0.1
RIL Version: 3.0
Thanks in advance.

I have never heard of anyone being able to flash a T999 bootloader onto an i747.
Did the phone come from AT&T? Did the phone have the AT&T boot screen?
Did you verify the phone's model # in download mode before bricking?

audit13 said:
I have never heard of anyone being able to flash a T999 bootloader onto an i747.
Did the phone come from AT&T? Did the phone have the AT&T boot screen?
Did you verify the phone's model # in download mode before bricking?
Click to expand...
Click to collapse
Thanks for your answer.
Yes, the phone was AT&T, it also says SGH-i747 behind the battery and it was I747 model on settings. It had a 4.1 custom rom when my brother gave it to me. I tried to upgrade it to 4.3 but I didn't know about bootloader stuff and tried to flash a bootloader using twrp so I've bricked the phone. The only way to unbrick it was with j-tag and the person who did this told me he was able to do so with T999 firmwares so now I have a T999 no-lte phone. Would it be risky to change it back with Odin to I747 bootloader and modem? Is there any safe way to do this?
Thanks again.

You can't cross-flash bootloaders with Odin, TWRP, or CWM without the possibility of -rebricking.
Does the IMEI in the phone (dial *#06#) match the imei on the label under the battery?
I'm very surprised that the phone's bootloader had to be cross-flashed. Where did you get the bootloader that you flashed?

audit13 said:
You can't cross-flash bootloaders with Odin, TWRP, or CWM without the possibility of -rebricking.
Does the IMEI in the phone (dial *#06#) match the imei on the label under the battery?
I'm very surprised that the phone's bootloader had to be cross-flashed. Where did you get the bootloader that you flashed?
Click to expand...
Click to collapse
Yes, the IMEI matches. I do not remember where I got that bricker bootloader, neither the installed one (as it was not flashed by me). I can remember that when I received the phone after unbrick, it was SIM locked so I had to give the phone again to this person to fix the SIM-Lock. As far as I know, AT & T I747 is unlocked, so my phone totally became T999.
Any safe way to try this? Or will I be using T999 forever?
Thanks again.

Boot into download mode and confirm that the model # is sgh-t999. If it is, you're stuck.

I've readed that full back to stock might help but it's nearly the same process of flashing everything so I'm not sure...

audit13 said:
Boot into download mode and confirm that the model # is sgh-t999. If it is, you're stuck.
Click to expand...
Click to collapse
It says T999 all the way lol. I think I'm stuck.
Thanks buddy.

Sorry, you are stuck with T-mobile ROMs.
Your post is the first oneI have seen where an AT&T s3 has been transformed via jtag into a T999.

audit13 said:
Sorry, you are stuck with T-mobile ROMs.
Your post is the first oneI have seen where an AT&T s3 has been transformed via jtag into a T999.
Click to expand...
Click to collapse
As this is an old device, I will try to flash it back to SGH-I747 bootloader before buying another phone. If succeed or not I will tell you the results here. Meanwhile, I'll be enjoying my T999 :silly:
Thanks.

I need some help to downgrade?

Sorry if its been asked, answered and in the wrong spot but I'm on fob6 5.0 and I want to downgrade to 4.4.2 so I can flash darthstaker. Can I do this? And if so can someone send me a link to a,mediafire or dropbox for the 4.4.2 Odin firmware files please?

this.guy.lol said:
Sorry if its been asked, answered and in the wrong spot but I'm on fob6 5.0 and I want to downgrade to 4.4.2 so I can flash darthstaker. Can I do this? And if so can someone send me a link to a,mediafire or dropbox for the 4.4.2 Odin firmware files please?
Click to expand...
Click to collapse
You should probably ask in the questions section. You can find official firmware in sammobile or updato (Google search)

Does the custom ROM need a kk bootloader and modem?

audit13 said:
Does the custom ROM need a kk bootloader and modem?
Click to expand...
Click to collapse
Yea it does. I also need to downgrade to sum unlock since tmo is screwing me around.

Downgrading will allow network unlocking using a free method?
As far as I recall, there is no way to force a bootloader downgrade from mm to kk.

audit13 said:
Downgrading will allow network unlocking using a free method?
As far as I recall, there is no way to force a bootloader downgrade from mm to kk.
Click to expand...
Click to collapse
I'm not on MM I'm on LP 5.0.2

My mistake, I meant to say LP, not mm as I know the note 3 never received mm from Samsung.

audit13 said:
My mistake, I meant to say LP, not mm as I know the note 3 never received mm from Samsung.
Click to expand...
Click to collapse
How do I network unlock then? Do I need just the baseband or how do I go about it? Tmo is lying and jacking me around and I'm poor n can't afford a unlock that costs

Flashing different bootloaders or modems will not sim unlock the phone. The cheapest method I know of to unlock would be to buy an unlock code via eBay.

audit13 said:
Flashing different bootloaders or modems will not sim unlock the phone. The cheapest method I know of to unlock would be to buy an unlock code via eBay.
Click to expand...
Click to collapse
What I'm asking is can I flash the baseband for 4.4.2 and do the service menu unlock as I would if on stock 4.4.2?

I have never heard of a service menu unlock method for the note 3. Do you have a link?

audit13 said:
I have never heard of a service menu unlock method for the note 3. Do you have a link?
Click to expand...
Click to collapse
That's my plan for the unlock is the service menu unlock. Can you please get me the KK modem/baseband to perform it please? Or a working link to the modems foe n900t for kk?

Do you have a link to the service menu unlock method? I've never heard of one.
There was a service menu unlock method for the s3 and possibly the s4 but never heard of one for the note 3.
The stock kk modem would be found in the kk stock ROM which can be downloaded from Sammobile.com.
Before flashing anything, I would confirm that such an unlock method works. Playing around with the service menu can wreak havoc with a phone.

audit13 said:
Do you have a link to the service menu unlock method? I've never heard of one.
There was a service menu unlock method for the s3 and possibly the s4 but never heard of one for the note 3.
The stock kk modem would be found in the kk stock ROM which can be downloaded from Sammobile.com.
Before flashing anything, I would confirm that such an unlock method works. Playing around with the service menu can wreak havoc with a phone.
Click to expand...
Click to collapse
I can't use sammobile. I don't have the patience to sit n sign up for it plus out takes,ungodly time,to download anything lol. Would,you or anyone have the files needed on deck? Say Android host sites or a,Google drive maybe?

You could search the general threads for the files you need. Not sure if they are there, but the 4.4.2 service menu may need a 4.4.2 bootloader? If the phone had a 5.0 bootloader, you may not be able to downgrade the bootloader.
How do you use the service menu to network unlock?
I never had a T-Mobile note 3, only the Canadian note 3.

audit13 said:
You could search the general threads for the files you need. Not sure if they are there, but the 4.4.2 service menu may need a 4.4.2 bootloader? If the phone had a 5.0 bootloader, you may not be able to downgrade the bootloader.
How do you use the service menu to network unlock?
I never had a T-Mobile note 3, only the Canadian note 3.
Click to expand...
Click to collapse
*#0011# I'm guessing. I need the mj2 baseband or before and only the baseband. I have a s8 plus and a s5 but I needs this unlocked so I can resell for more

Are you aware of anyone who successfully unlocked using the service menu? If there was such a method, it probably would have been posted on XDA.

audit13 said:
Are you aware of anyone who successfully unlocked using the service menu? If there was such a method, it probably would have been posted on XDA.
Click to expand...
Click to collapse
I've only seen and done it myself on a Samsung S II (hercules) on stock firmware and read that it was available on other similar Samsung phones but I never tried it on the Note 3 as I thought Samsung eliminated that option (even though it was pretty hidden)

The option was also available for the s3 on 4.1.1 but it has never been done with any note 3 on any version of the stock ROM afaik.