Develop Bugs

JellyBean carrier sim unlock

Anyone else notice if you had sim unlocked gnex previously then flash jellybean you lose the carrier sim unlock an it asks for sim pin again if you use a different sim card an then when you enter the proper unlock pin code it still says unsuccessful on jellybean takju build.I flashed back to 4.0.4 yakju an everything was fine an unlocked, I guess I will have to wait till yakju gets official jellybean.

That is because your device was NOT SIM-unlocked to begin with. The place you bought it from must have unlocked it for you with a code.
There is a thread in the general section showing you how to unlock it. (It's for DoCoMo, but will work for any carrier-locked device).
Sent from my Galaxy Nexus using Tapatalk 2

efrant said:
That is because your device was NOT SIM-unlocked to begin with. The place you bought it from must have unlocked it for you with a code.
There is a thread in the general section showing you how to unlock it. (It's for DoCoMo, but will work for any carrier-locked device).
Sent from my Galaxy Nexus using Tapatalk 2
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The phone was originally locked to vodafone network an I got the unlock code from them an still have it but it wont work on jellybean but works fine on ics no matter what international build or custom ics rom.I even restored back to ics an its still unlocked just not on jellybean, maybe because jellybean is only a test build at moment an not a complete build.I try that docomo app thanks.

asnwer
slayr76 said:
The phone was originally locked to vodafone network an I got the unlock code from them an still have it but it wont work on jellybean but works fine on ics no matter what international build or custom ics rom.I even restored back to ics an its still unlocked just not on jellybean, maybe because jellybean is only a test build at moment an not a complete build.I try that docomo app thanks.
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well i have the same problem too .. so i had to came back to 4.0.4.... cuase voodoo is not working to sim unlock in jelly bean, but you have one option use galaxim unlock.... is in google play for download no cost, but you have to pay if you wanna this aplication unlock your sim, im trying and trying to find another option but i cant at the momment.

[Q] Phone issues

we unlocked this phone a few months ago and everything was working great.
last week sometime my son stopped receiving calls and txts and had a simcard icon showing that his sim card is locked. we did some troubleshooting with virgin and they determined he needed a new sim. so we restored this phone back to default and now there is still the sim card icon at the top of the screen. when we rebooted the phone it asks for a network unlock code. we were told by virgin to contact rogers to get this code. they were unable to help. i tried entering the unlock code that you provided us previously and we get an error unsuccessful unlock.
any ideas would be great.

so after almost two weeks of working with virgin and cellunlocker.net we still have not been able to get this phone working. im being told that sometimes when you update the firmware like we did the phone becomes re locked to the original carrier. i was sent a file to reload the stock firmware but the application just crashes when i run it. Does anyone know what i can do to get this phone up and running?? please help. thank you

shortyross09 said:
so after almost two weeks of working with virgin and cellunlocker.net we still have not been able to get this phone working. im being told that sometimes when you update the firmware like we did the phone becomes re locked to the original carrier. i was sent a file to reload the stock firmware but the application just crashes when i run it. Does anyone know what i can do to get this phone up and running?? please help. thank you
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Probably not a rom issue.
Probably will need to know what android version. ICS Official apparently has an issue with relocking from what I have read.

Neuntoter said:
Probably not a rom issue.
Probably will need to know what android version. ICS Official apparently has an issue with relocking from what I have read.
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currently has version 2.3.5

[Q] How to unlock SGH-i747m

How do I unlock the phone? I currently have Cm11 on it.
I want to ditch rogers (terrible service) so what do I need to do to unlock it?
side note, when I got the phone it was via future-shop warranty and they gave me a fido version and put my rogers sim in it, did they unlock it then?

SpacePotato said:
How do I unlock the phone? I currently have Cm11 on it.
I want to ditch rogers (terrible service) so what do I need to do to unlock it?
side note, when I got the phone it was via future-shop warranty and they gave me a fido version and put my rogers sim in it, did they unlock it then?
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Since Fido is really owned by Rogers, your Rogers SIM may work in the phone if it was originally locked to Fido. To check whether it's unlocked or not, try putting in a non-compatible SIM (like Bell or Telus) and see whether it prompts you for an unlock code. If it does, you would need to purchase a code online or request one from the carrier. If it wasn't on Android 4.3 prior to the CM11 installation, you may be able to install stock Android 4.1.1 and free unlock. Either way, whether you are free unlocking or using an unlock code, you have to be on a stock ROM for it work. You can check your phone's settings and see what baseband and bootloader versions you have. This will tell us know whether you should flash stock 4.1.1 or 4.3

Larry2999 said:
Since Fido is really owned by Rogers, your Rogers SIM may work in the phone if it was originally locked to Fido. To check whether it's unlocked or not, try putting in a non-compatible SIM (like Bell or Telus) and see whether it prompts you for an unlock code. If it does, you would need to purchase a code online or request one from the carrier. If it wasn't on Android 4.3 prior to the CM11 installation, you may be able to install stock Android 4.1.1 and free unlock. Either way, whether you are free unlocking or using an unlock code, you have to be on a stock ROM for it work. You can check your phone's settings and see what baseband and bootloader versions you have. This will tell us know whether you should flash stock 4.1.1 or 4.3
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Baseband is I747MVLUEMK5 bootloader I have no idea, I just used odin to flash CWM.
I'm open to flashing 4.1 to get a free unlock then going back to CM11

SpacePotato said:
Baseband is I747MVLUEMK5 bootloader I have no idea, I just used odin to flash CWM.
I'm open to flashing 4.1 to get a free unlock then going back to CM11
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I747MVLUEMK5 is ver. 4.3 and you almost certainly have the 4.3 bootloader as well. With this, unfortunately, you can't downgrade to 4.1.1 where the free unlock option is available as any attempt to do this could brick your phone. You would need to request an unlock code from the carrier, if eligible, or purchase one online. There have been reports also that the unlock codes don't work when you are on a custom ROM so if you buy one online and it doesn't work, you will have to flash stock 4.3.

Larry2999 said:
I747MVLUEMK5 is ver. 4.3 and you almost certainly have the 4.3 bootloader as well. With this, unfortunately, you can't downgrade to 4.1.1 where the free unlock option is available as any attempt to do this could brick your phone. You would need to request an unlock code from the carrier, if eligible, or purchase one online. There have been reports also that the unlock codes don't work when you are on a custom ROM so if you buy one online and it doesn't work, you will have to flash stock 4.3.
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ok, which carrier would I have to talk to, it was a fido phone as mentioned previously. Also is their a possibility I could downgrade to 4.1, or is it a guaranteed brick?

SpacePotato said:
ok, which carrier would I have to talk to, it was a fido phone as mentioned previously. Also is their a possibility I could downgrade to 4.1, or is it a guaranteed brick?
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You would need to contact Fido since it was originally on their network. I'm afraid nobody has yet posted a method to allow you successfully downgrade to 4.1.1 and still preserve the free unlock functionality. You could follow some instructions posted in this forum to downgrade to 4.1.1. However, this wouldn't allow you downgrade the bootloader/modem which is required for the unlock.

Larry2999 said:
You would need to contact Fido since it was originally on their network. I'm afraid nobody has yet posted a method to allow you successfully downgrade to 4.1.1 and still preserve the free unlock functionality. You could follow some instructions posted in this forum to downgrade to 4.1.1. However, this wouldn't allow you downgrade the bootloader/modem which is required for the unlock.
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ok thanks.

Larry2999 said:
I747MVLUEMK5 is ver. 4.3 and you almost certainly have the 4.3 bootloader as well. With this, unfortunately, you can't downgrade to 4.1.1 where the free unlock option is available as any attempt to do this could brick your phone. You would need to request an unlock code from the carrier, if eligible, or purchase one online. There have been reports also that the unlock codes don't work when you are on a custom ROM so if you buy one online and it doesn't work, you will have to flash stock 4.3.
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I found a way to downgrade from 4.3 to 4.1.1 or 4.0.4 stock. (for Bell).
I bought and used Mobile Odin (available on the play store). Anyhow, it flashes the stock rom and not the old bootloaders. Once you're on 4.1.1 or 4.0.4 the problem is that *#197328640# no longer works. Basically when you type that ServiceMode comes up, but all the options are gone. I believe this is because they locked those features on the new bootloader (which is still on the phone after the Mobile Odin downgrade...)
Unlocking this phone has become a major pain in the ass.

htc_softbank said:
I found a way to downgrade from 4.3 to 4.1.1 or 4.0.4 stock. (for Bell).
I bought and used Mobile Odin (available on the play store). Anyhow, it flashes the stock rom and not the old bootloaders. Once you're on 4.1.1 or 4.0.4 the problem is that *#197328640# no longer works. Basically when you type that ServiceMode comes up, but all the options are gone. I believe this is because they locked those features on the new bootloader (which is still on the phone after the Mobile Odin downgrade...)
Unlocking this phone has become a major pain in the ass.
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Click to collapse
You are quite right. Sam and the networks are winning this time. You can indeed use Mobile Odin to downgrade the system (ROM). However, there hasn't been any reports of a successful downgrade of the bootloader. Therefore, even if you downgrade without bricking the phone, you can't free unlock. Tough but you will need a carrier unlock code.

[Q] How to Unlock -- the code is failing, maybe root is the cause

So, I have contacted AT&T about my move to T-Mobile and that I needed my phone unlocked. They told me how to do it and once I received the code, I tried it with my cousins sim card (T-Mobile) and tried it twice, but it failed. The email in which I received the code stated that I only have 5 tries before it permanent locks to AT&T, so I stopped trying. I went to the T-Mobile store and tried with a sim card there, and it failed again. I now only have 1 last try, so I want to know if there is a way to unlock my phone after it has been rooted. I suspect the reason my unlock code is not working is because of my phone is rooted, and running the slimkat image.
Does anyone know what is the best way to proceed from here? I don't have the original image from my phone anymore, but I have my sister's phone and if making an image of her phone would work to restore my phone to AT&T, then I can do it. But if there is another way of doing this, please let me know. I even tried using some unlock tool app, but it failed. It actually doesn't do anything. I tried SGS Unlock Tool and CSC Select.

mji2015 said:
So, I have contacted AT&T about my move to T-Mobile and that I needed my phone unlocked. They told me how to do it and once I received the code, I tried it with my cousins sim card (T-Mobile) and tried it twice, but it failed. The email in which I received the code stated that I only have 5 tries before it permanent locks to AT&T, so I stopped trying. I went to the T-Mobile store and tried with a sim card there, and it failed again. I now only have 1 last try, so I want to know if there is a way to unlock my phone after it has been rooted. I suspect the reason my unlock code is not working is because of my phone is rooted, and running the slimkat image.
Does anyone know what is the best way to proceed from here? I don't have the original image from my phone anymore, but I have my sister's phone and if making an image of her phone would work to restore my phone to AT&T, then I can do it. But if there is another way of doing this, please let me know. I even tried using some unlock tool app, but it failed. It actually doesn't do anything. I tried SGS Unlock Tool and CSC Select.
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I don't believe it failed do to being rooted so much as being on a custom ROM and not having the stock dialer. You will probably be best served by reverting to a Stock ROM before using your last try. BE CERTAIN you flash the ROM appropriate for your current bootloader and modem. If you fail with your last try your only recourse will be to purchase an unlock code from a third party, or so I have read (unless you are still on the 4.1.1 bootloader and modem).

The best bet is to revert to stock unrooted if possible. What is your current boot loader? This is extremely important as this will determine your options, if any, of returning to stock and methods of unlocking.

Well, I rooted my phone back when I first got it (2 years ago), so I am not sure what boot loader I have (I think I was running Jelly Bean 4.1). I know that I never updated to anything afterwards. It was not until recently that I updated to the SlimKat, rather than trying to update to an AT&T image. If I was to install one of the stock ROMs, do I need to use my computer, or can I use TWRP? Or do I need everything to be stock?

Before flashing anything, download the Samsung Phone Info app from the play store and confirm the bootloader and modem currently on your phone. Post the version here and we'll try to help you get your phone unlocked.
Root gives you access to system files and does not have an effect on entering an unlock code into a stock ROM.

I just download an app called "Phone INFO Samsung" but I don't see anything under "Firemware's CSC Code" -- totally blank. When I choose to browse firmware, it only shows me the year 1970-01-01, and CSC: ATT. The Mnufacture date: 2013-01-19

You need to look for the bootloader, not firmware.
If you have a terminal app on your phone, open the app, type su and press enter. Type getprop ro.bootloader and press enter.

okay, this is what I got:
I747UCDLK3
Thanks for helping out with this.
So, since my attempts of unlocking have been on the non-Stock ROM, does it still count towards my 5 failed attempts? Or is the phone able to keep count of the attempts, regardless of ROM? I would assume that since the correct ROM has to be installed for the unlock code to work, then shouldn't the ROM be the one keeping count of the failed attempts, too? Just wondering...

Since you are on LK3 bootloader, that means you can use the free method to unlock your phone.
You can use Odin to flash the stock ATT 4.1.1 ROM from sammobile.com: http://www.sammobile.com/firmwares/database/SGH-I747/.
Free method is here: http://forum.xda-developers.com/showthread.php?t=2529200

audit13 said:
Since you are on LK3 bootloader, that means you can use the free method to unlock your phone.
You can use Odin to flash the stock ATT 4.1.1 ROM from sammobile.com: http://www.sammobile.com/firmwares/database/SGH-I747/.
Free method is here: http://forum.xda-developers.com/showthread.php?t=2529200
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Sorry to be such noob at this, but do I need to use (Odin via) my computer, rather than using the TWRP recovery tool already on my phone? I know I have not gone through all the research material, I just did this once and never looked back, I am still in the noob stage.

Yes, you must use desktop Odin (I recommend Odin 3.07) to flash stock 4.1.1.
If you decide to flash using Odin, uncheck everything except f.reset time before flashing. After flashing and you see the word "reset" in the status window, remove USB cable, remove battery, replace battery, boot into recovery, do a full factory reset/wipe, boot the phone, use the free method to unlock the phone, restart, and you should be permanently sim unlocked.

Okay, got it! Thanks for the responses, and I appreciate the fact that you guys did not just send me searching through the tons of threads you have compiled in the forums. I was sort of expecting to be chastised for not doing extensive research before posting. You guys have been great!

[Q]Help SIM unlocking Tmobile SGH-T999 for use in South America!

Hi all, I've been reading tons of threads and I am still having some difficulties with this phone. I am not in the US, I got this phone from a coworker that was going to throw it away and brought it with me to south america to give it to my friends mom who has no money, its and old phone but the one she has is even crappier ,I thought I would be able to just pop the SIM and get it going but nope.
If anyone could point me in the right direction I would really appreciate it, I have a few more days before I go back home and I would love to be able to leave this working for her.
Let me put you up to speed:
-Phone is running Android 4.3
-Phone was rooted using Odin, has SU and CWM
-Followed thread here to SIm unlock: https://forum.xda-developers.com/showthread.php?t=2023709 but #4 option is not present on 4.3
-I tried downgrading to 4.1.2 custom root666 to see if I could get #4 but to no avail since you cannot from this 4.3 version
-About to follow this thread :https://forum.xda-developers.com/showpost.php?p=48012926&postcount=8
but not sure if correct for what I want to do.
No more ideas, please help!

The phone can only be unlocked used an unlock code. Try contacting T-Mobile for a free unlock code or buy a code from eBay.

i'm with the same problem. i bought an sgh-i747 and after two months it bricked, so i replace the logical card (i don't remember how to say it in English, lol.) and boom!!! now i have a t999 and it doesn't work with movistar. (i'm from Venezuela)
but well, i've been reading posts about unlocking the phone and every one of them only works in JB 4.1.x. i don't know if i could unlock it by the downgrade process and i'm scared of getting the phone bricked again.