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[Q]I9300 network unlock on firmware version 4.3 (EFS v2)

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By h0rm1, Junior Member on 16th January 2014, 06:56 AM
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Hello,

Is there any solution to sim unlock the galaxy s3 on android 4.3 with the changed efs partition (v2)? I read a bunch of threads and the conclusion is it can't be done.
I have a couple of questions though:

I do have V1 backups of the efs folder. Is it possible to flash an older firmware, 4.1.1 for example and then restore the old efs backup and use the galaxsim unlock solution ? if i do this and upgrade the phone to 4.3 afterwards will it still be unlocked or i`ll remain stuck with the 4.1.1 rom ?

If i keep the current 4.3 rom and just modify the efs partition with the backup i have (v1) will it work ? i read in the faq thread that the newer firmwares still read the old efs format so it should be ok right ?


Thank you,
~h0rm1~
 
 
16th January 2014, 08:22 AM |#2  
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4.3 won't work with efs v1, to my understanding. If you unlock with 4.1 then when you update to 4.3 it will lock again.

EFS v2 was invented for a reason, to stop network unlocking without a valid code.

Sent from my GT-I9300 using Tapatalk
16th January 2014, 08:30 AM |#3  
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Quote:
Originally Posted by boomboomer

4.3 won't work with efs v1, to my understanding. If you unlock with 4.1 then when you update to 4.3 it will lock again.

EFS v2 was invented for a reason, to stop network unlocking without a valid code.

Sent from my GT-I9300 using Tapatalk

i would like to try different combinations, as long as i have a backup of my efs folder i should be okay right ?
i wouldn't like to mess it up completely

Thanks
16th January 2014, 01:19 PM |#4  
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You need to pay .
20th January 2014, 09:27 AM |#5  
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Quote:
Originally Posted by h0rm1

Hello,

Is there any solution to sim unlock the galaxy s3 on android 4.3 with the changed efs partition (v2)? I read a bunch of threads and the conclusion is it can't be done.
I have a couple of questions though:

I do have V1 backups of the efs folder. Is it possible to flash an older firmware, 4.1.1 for example and then restore the old efs backup and use the galaxsim unlock solution ? if i do this and upgrade the phone to 4.3 afterwards will it still be unlocked or i`ll remain stuck with the 4.1.1 rom ?

If i keep the current 4.3 rom and just modify the efs partition with the backup i have (v1) will it work ? i read in the faq thread that the newer firmwares still read the old efs format so it should be ok right ?


Thank you,
~h0rm1~

As of now, there's still no possibility to directly unlock devices with efs v2. I'm still working on it.

One thing is sure though : once properly unlocked (efs v1 with 4.1 for instance), your device won't be locked again when you update to 4.3. It means that if you have efs v1 backup, you can flash an old 4.1 rom to your device, restore the backup, and then use GalaxSim Unlock. I believe all radio (even post mg4) can still read efs v1, so you shoudn't even need to flash an old rom (it's been confirmed working by a few users already).
20th January 2014, 09:29 PM |#6  
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Quote:
Originally Posted by spocky12

As of now, there's still no possibility to directly unlock devices with efs v2. I'm still working on it.

One thing is sure though : once properly unlocked (efs v1 with 4.1 for instance), your device won't be locked again when you update to 4.3. It means that if you have efs v1 backup, you can flash an old 4.1 rom to your device, restore the backup, and then use GalaxSim Unlock. I believe all radio (even post mg4) can still read efs v1, so you shoudn't even need to flash an old rom (it's been confirmed working by a few users already).

Thanks for the reply, i eventually payed for the unlock code, i wasted too much time trying to make it work
31st January 2014, 05:00 PM |#7  
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Quote:
Originally Posted by h0rm1

Thanks for the reply, i eventually payed for the unlock code, i wasted too much time trying to make it work

Since I'm kinda stuck in the same boat, could you PM me the exact website where you bought the code?
Let's just say there's too many and I'm a tad paranoid.
31st January 2014, 05:37 PM |#8  
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Quote:
Originally Posted by boomboomer

4.3 won't work with efs v1, to my understanding. If you unlock with 4.1 then when you update to 4.3 it will lock again.

EFS v2 was invented for a reason, to stop network unlocking without a valid code.

Sent from my GT-I9300 using Tapatalk

I'm totally confused then because when I bought my S3 it was locked to Three mobile(and yes it was definitely locked) and I used Galaxy Sim unlock to unlock it I was on 4.1. I now have the new EFS v2 and now switch between roms on a regular basis including 4.3 I also looked on Galaxy Sim unlock site on Google play and the dev say's it may not work on new updates as well
31st January 2014, 10:48 PM |#9  
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My understanding was based on the number of people who have posted here after updating and found sim lock reinstated with no way to downgrade. It's possible their efs was already damaged and yours isn't.

Nothing seems to unlock efs 2 though, apart from a legit code, heard no success story yet.
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22nd April 2014, 09:06 AM |#10  
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Quote:
Originally Posted by boomboomer

My understanding was based on the number of people who have posted here after updating and found sim lock reinstated with no way to downgrade. It's possible their efs was already damaged and yours isn't.

Nothing seems to unlock efs 2 though, apart from a legit code, heard no success story yet.

from now there is a way for direct unlock EFSv2 Security (needs root)
we're also working on ssnv crypted region unlock (as region locks are now also stored in nv_data in crypted form)

Code:
22:59:34 - Starting ADB Server
22:59:35 - ADB Device: GT-I9300
22:59:35 - SW Version: I9300XXUGNA8 (Android: 4.3)
22:59:35 - Phone Serial: RF1CA5Z2W8Y
22:59:35 - Platform: exynos4
22:59:35 - Checking SU Root Access..
22:59:41 - ROOT Access: True (SuperUser) Processing..
22:59:45 - NVM Readed Clearing Simlocks
22:59:48 - New Security Detected (EFSv2) Analysing now..
22:59:51 - HWIDS1 Found: Sending data to server..
23:00:02 - Received unlocked data from server.. processing now..

23:00:04 - Unlock Done..

 -- Operation done in 34 seconds --
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23rd April 2014, 04:41 PM |#11  
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Quote:
Originally Posted by 123unlock

from now there is a way for direct unlock EFSv2 Security (needs root)
we're also working on ssnv crypted region unlock (as region locks are now also stored in nv_data in crypted form)

Code:
22:59:34 - Starting ADB Server
22:59:35 - ADB Device: GT-I9300
22:59:35 - SW Version: I9300XXUGNA8 (Android: 4.3)
22:59:35 - Phone Serial: RF1CA5Z2W8Y
22:59:35 - Platform: exynos4
22:59:35 - Checking SU Root Access..
22:59:41 - ROOT Access: True (SuperUser) Processing..
22:59:45 - NVM Readed Clearing Simlocks
22:59:48 - New Security Detected (EFSv2) Analysing now..
22:59:51 - HWIDS1 Found: Sending data to server..
23:00:02 - Received unlocked data from server.. processing now..

23:00:04 - Unlock Done..

 -- Operation done in 34 seconds --


So when will it be available?
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