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Sim card unlock Samsung Galaxy S3 GT-I9305

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LucasBass
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(Last edited by LucasBass; 14th June 2014 at 08:33 AM.)
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Default Sim card unlock Samsung Galaxy S3 GT-I9305

Hi, I have a Samsung galaxy S3 GT-i9305 which is locked on EE, United Kingdom. Can someone help me to unlock it for free. I don't want to pay for something that can be done for free. I am on rooted stock Jelly bean 4.1.2. Another thing voodoo galaxy S3 Sim unlock and all free unlocking app on Google play doesn't work and also these instructions doesn't work cause the last option is not available.

Put a different SIM to your own into the handset and then turn off the handset and switch it back on with that SIM inside.
Go to the dial pad on your phone and then type in *#197328640#.
Head over to the Main Menu of the device > [1] UMTS > [1] Debug Screen > [8] Phone Control > [6] Network Lock > Options [3]Perso SHA256 OFF > and wait for around 30 seconds.
You should then head to Menu and choose Back, where you will come across the Network Lock. Choose [4] NW Lock NV Data INITIALLIZ.
Enter *#197328640#.

Can someone help me please.


EDIT 12/27/2013:
Follow these instructions to unlock your phone. It worked for me.

First you need to downgrade to Jellybean 4.1.1.
Download the 4.1.1 firmware from the link below
It is the stock 4.1.1 for S3 GT-i9305 (LTE) United kingdom (EE)
There is no carrier bloatware in it.
I got the firmware from http://sammobile.com/
http://terafile.co/e729d5704241/I930...VRALI5_EVR.zip

Boot into download mode, flash the downloaded firmware through ODIN.
Here is instructions on how to flash the firmware with Odin http://forum.xda-developers.com/show....php?t=1671969

Then use these instruction to unlock your phone.

Put a different SIM to your own into the handset and then turn off the handset and switch it back on with that SIM inside.
Go to the dial pad on your phone and then type in *#197328640#.
Head over to the Main Menu of the device > [1] UMTS > [1] Debug Screen > [8] Phone Control > [6] Network Lock > Options [3]Perso SHA256 OFF > and wait for around 30 seconds.
You should then head to Menu and choose Back, where you will come across the Network Lock. Choose [4] NW Lock NV Data INITIALLIZ.
Enter *#197328640#.

That's it your phone is now unlocked. You can now use any sim card.
You can update, Root, flash custom rom and everything you want. It will stay unlocked
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DjeMBeY
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Default Re: unlocking samsung galaxy s3 gt-i9305

You need to downgrade JB to 4.1.1 if you want to use the Trick
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LucasBass
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Originally Posted by djembey View Post
You need to downgrade JB to 4.1.1 if you want to use the Trick
How to downgrade to jellybean 4.1.1??
 
DjeMBeY
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Default Re: unlocking samsung galaxy s3 gt-i9305

Use Odin and flash your phone with JB 4.1.1
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LucasBass
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(Last edited by LucasBass; 27th December 2013 at 02:22 PM.)
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Default Can' I upgrade

Thanks, I have successfully downgraded to 4.1.1. and have also successfully unlocked my phone using the instructions above. Now I want to upgrade it, If i upgrade it will it lock my phone again?? If yes, Does someone have a solution to upgrade without locking my phone again?
 
DjeMBeY
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Default Re: unlocking samsung galaxy s3 gt-i9305

No, it'll stay unlocked. You can upgrade to any rom, stock or custom. It's up to you I'm glad I could help.

Hit the Button and you're welcome
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lite426
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Hi lucas, I'm in the same scenario. Can you tell me which rom you flashed/link to where you got it? So I can unlock mine too.

And if I want to upgrade back to the latest unbranded UK stock rom for the i9305 where would I find that?
 
DjeMBeY
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Default Re: unlocking samsung galaxy s3 gt-i9305

www.sammobile.com/firmwares or www.samsung-updates.com
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lite426
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(Last edited by lite426; 21st March 2013 at 10:59 AM.)
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Originally Posted by djembey View Post
I can't find UNBRANDED United Kingdom firmware for the i9305 on either of those sites. They're all carrier branded. And the reason I want unbranded is to avoid any carrier bloatware etc.
 
abbaskip
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Default Re: unlocking samsung galaxy s3 gt-i9305

Just downgrade to any branded firmware, unlock, then head over to the xda developer forum to upgrade to the unbranded ROM of your choice

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