How to sim unlock? - Galaxy S III Q&A, Help & Troubleshooting

Anyone here has done it? What do I need?
I've still a year left in my contract and want to sim unlock the phone to give it to a family member who is on another carrier.
Does the unlock stay if you install different ROMS, restore to factory reset and all?
Thanks.

It depends if your rom is mg4 (July) or newer then there are no free ways to unlock
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rootSU said:
It depends if your rom is mg4 (July) or newer then there are no free ways to unlock
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Just checked and it's MG4.
I can't sim unlock?

I don't have the S3 anymore, but you could try flashing and older firmware using Odin and then use this app: https://play.google.com/store/apps/details?id=com.spocky.galaxsimunlock&hl=en, if not available in your country, try the one by SuperCurio: http://project-voodoo.org/android-apps

Sensamic said:
Just checked and it's MG4.
I can't sim unlock?
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the only option is to purchase an unlock code. Make sure you buy one that offers refund if fail
eksasol said:
I don't have the S3 anymore, but you could try flashing and older firmware using Odin and then use this app: https://play.google.com/store/apps/details?id=com.spocky.galaxsimunlock&hl=en, if not available in your country, try the one by SuperCurio: http://project-voodoo.org/android-apps
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This wont work. Problem is EFS v2, no way to downgrade without EFS v1 backup
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I see, I always remember to backup my EFS folder with Samsung phones. I don't like what Samsung been doing with all these locking.

What do you mean purchase an unlock code? Haven't heard of that before.
Where can I get one?

Sensamic said:
What do you mean purchase an unlock code? Haven't heard of that before.
Where can I get one?
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What? You've been able to buy an unlock code from the carrier or websites since the beginning of time. Every locked mobile phone in the world supports this
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rootSU said:
What? You've been able to buy an unlock code from the carrier or websites since the beginning of time. Every locked mobile phone in the world supports this
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Great. Will search on the web for websites that sell them and then call my carrier.
So that's the only way for me to sim unlock?
Will it work if I update the phone to 4.3 (the leak firmware or the official one when it's released)?
Thanks.

Code unlock is permanent. Buy one with money back guarantee
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rootSU said:
Code unlock is permanent. Buy one with money back guarantee
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Found a website called doctorsim. Seems reliable from comments and all. Just sent them an email.
I hope they can sim unlock phones which are still under contract.

Sensamic said:
I hope they can sim unlock phones which are still under contract.
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Of course they can. That's the whole point
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Related

[Q] Help No recovery, Odin wont work

Hi,
I tried to flash my s3 with a rom now when it loads it gets stuck and says unfortunately setup wizard has stopped and does not go any further, I have also deleted my backup I had and odin wont load my phone up when I connect it.
Does anyone have any ideas on what I can do
Thanks
What rom?
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rootSU said:
What rom?
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Paranoid android the 4.3 jelly bean
So what actually happens when you boot into recovery manually?
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rootSU said:
So what actually happens when you boot into recovery manually?
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Its fine I have managed to fix its thanks anyway

[Q] i9300 dead. tryed old roms,roots,no pit partition

Hy first sry about bad eng.
Yesturday my phone died with no reason. Cannot boot. Tryed everything. From old roms,moded/stock(like 15), pit files,bootlanders etc...
Every time no pit partition, i searched on internet,and tryed changing computer,changing usb hubs,and everything. Can some 1 pls help me ?
sam galaxy s3 i9300 16 gb
Unfortunately .pit was your last resort. If that failed, you have a NAND issue (internal memory) which usually means a motherboard replacement is required
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rootSU said:
Unfortunately .pit was your last resort. If that failed, you have a NAND issue (internal memory) which usually means a motherboard replacement is required
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Im sry for comming up like monkey,but i realy dont know what should i do, i have contract for that cell for another 12 mounths i need to pay with no meather of what. Should i take it to warnity? I understand some things about roms and s**t , and i was changing roms before. I realy tryed everything,only dont know how and can i install new pit partition in cell?
Yep, if you have warranty - use it. Definitely
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rootSU said:
Yep, if you have warranty - use it. Definitely
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atleast i know what i should to do now. ty anyway :good:

[Q] Unlock sim

Hey guys I have a question. I if I roll back to android 4.1.1 and unlock the sim for free can I put back the 4.1.2 or later androids and the sim will stay unlocked ?
Depends. If you've ever flashed mg4 or newer - no.
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rootSU said:
Depends. If you've ever flashed mg4 or newer - no.
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I don't have the phone, I would buy it from a guy but it's carrier locked ( Orange Romania ) and I have a different carrier and he told me he has jz05k.i9300xxemg4. so Is there a way to unlock my sim free no charge ?
No
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rootSU said:
No
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Ok thanks for the information. I think I will pass the phone then

[Q] bootloader and mobile odin

I installed the official 4.3 firmware via mobile odin pro. afaik mobile odin does not flash or update the bootloader. everything seems fine . my question is, is there any reason to install the new bootloader? using pc odin perhaps from the leak files? im thinking as long as the bootloader i have works it is best to leave it alone. also is there a utility that can identify which bootloader i have?
Afaik the bootloader is irrelevant to the rom or recovery, some people still have the ICS bootloader to avoid the flash counter increasing (even with the danger of SDS it brings).
I read that the newest 4.3 has a 'warranty bit' register, but if that is any different to the normal JB bootloader I don't know.
For the moment I'd wait, it won't do any harm.
I've got ics bootloader still
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rootSU said:
I've got ics bootloader still
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I'm also using the old ICS bootloader here @rootSU just got a question... can it still be used on the 4.3 official firmware?
I've not used official firmware but I can't think of a reason why not
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Can I root i9300 with jb 4.3 without odin?

please
I've a problem with usb port on my i9300. I can't use Odin in Downloading mode.
Can I do root with another way?
Thank you
v.carrieri said:
please
I've a problem with usb port on my i9300. I can't use Odin in Downloading mode.
Can I do root with another way?
Thank you
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Same reply as your other thread, Mobile Odin
killall said:
Same reply as your other thread, Mobile Odin
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Mobile odin requires root, ergo cannot be used to root.
Im not thinking of any way without pc connection. Framaroot hasn't worked for ages but its worth testing if no one else has
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so the old method of CWM install.zip?
Nothing like that you know?
No
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Can he push a kernel with su binary on adb without su comand?
Sent From My Galaxy S III Using XDA Premium 4
Only with custom recovery
Every option I can think of relies on something he doesn't have
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