[Q] firmware downgrade - AT&T, Rogers, Bell, Telus Samsung Galaxy S III

has anyone figured out how to downgrade 4.3 ota to 4.1.1. can't unlock my phone with 4.3 installed. thanks

dandydon414 said:
has anyone figured out how to downgrade 4.3 ota to 4.1.1. can't unlock my phone with 4.3 installed. thanks
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There have been several well documented reports of successfully downgrading the ROM (only) from 4.3 to 4.1.1. What has also been established is that you cannot downgrade the 4.3 bootloader to 4.1.1 which is required for the free unlock process to work. If you are seeking, therefore, to free unlock your phone, sorry but it won't work. Once you have the 4.3 via OTA, you will need an unlock code.

Larry2999 said:
There have been several well documented reports of successfully downgrading the ROM (only) from 4.3 to 4.1.1. What has also been established is that you cannot downgrade the 4.3 bootloader to 4.1.1 which is required for the free unlock process to work. If you are seeking, therefore, to free unlock your phone, sorry but it won't work. Once you have the 4.3 via OTA, you will need an unlock code.
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thanks for the reply...hopefully by the time I'll need to travel abroad (in september) someone would have figured out a way to unlock for free this phone running on 4.3.. bought this on ebay for use abroad and never occurred to me to make sure it wasn't upgraded to 4.3.. live and learn.

Related

How to sim unlock! I'm Confused please Help!

Ok so i have been researching and i'm soooo confused. I am on 4.3. I have read that i need to downgrade but doing so will hard brick my phone. I need to sim unlock it so i can use it on cincinnati bell. can somone please tell me how i can sim unlock my phone successfully? When i go into the hidden menu i have the option that says rat_free_support.
pitbullmommy45245 said:
Ok so i have been researching and i'm soooo confused. I am on 4.3. I have read that i need to downgrade but doing so will hard brick my phone. I need to sim unlock it so i can use it on cincinnati bell. can somone please tell me how i can sim unlock my phone successfully? When i go into the hidden menu i have the option that says rat_free_support.
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Unfortunately, nobody has yet posted a method to successfully free unlock the S3 running on 4.3. It's possible to downgrade your ROM only to 4.1.1 without downgrading the bootloader and retain full phone functionality. However, you would still not be able to free unlock as you need to be on complete stock 4.1.1, including the bootloader, to be able to free unlock. Until someone comes up with an exploit, your best options now would either be to request the unlock code from your carrier, if eligible, or purchase an unlock code online.
Larry2999 said:
Unfortunately, nobody has yet posted a method to successfully free unlock the S3 running on 4.3. It's possible to downgrade your ROM only to 4.1.1 without downgrading the bootloader and retain full phone functionality. However, you would still not be able to free unlock as you need to be on complete stock 4.1.1, including the bootloader, to be able to free unlock. Until someone comes up with an exploit, your best options now would either be to request the unlock code from your carrier, if eligible, or purchase an unlock code online.
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so i got a different s3. its on 4.1.2. i'm trying to downgrade but i can't find the firmware download anywhere
pitbullmommy45245 said:
so i got a different s3. its on 4.1.2. i'm trying to downgrade but i can't find the firmware download anywhere
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Downgrading 4.1.2 to 4.1.1 and unlocking is a breeze. You will find the Odin flashable file and downgrading instructions via the link below...
http://fortedge.com/downgrade.html
Larry2999 said:
Downgrading 4.1.2 to 4.1.1 and unlocking is a breeze. You will find the Odin flashable file and downgrading instructions via the link below...
http://fortedge.com/downgrade.html
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thank u so much. the file says its a rom though? do i have to root my phone. my phone is completly stock unrooted or anything.
pitbullmommy45245 said:
thank u so much. the file says its a rom though? do i have to root my phone. my phone is completly stock unrooted or anything.
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It's a zip file. You would need to download it extract all files. The file to flash via Odin is: I747UCDLK3_I747ATTDLK3_I747UCDLK3_HOME.tar.md5. It doesn't matter whether your phone is rooted or not. A successful flash will deliver a complete stock image. When downgrading from 4.1.2 to 4.1.1, you may experience some error messages after reboot due to some remnants of 4.1.2 on the system. This can be resolved by doing a reset to factory settings either via recovery or from the settings menu.

[Q] unlock bootloader samsung galaxy s3 sph-l710 sprint android 4.3

Unlock bootloader samsung galaxy s3 sph-l710 sprint android 4.3 L710VPUCMK3
Hi friends. I have a problem. On my phone running the latest stock version of Android, and I need to downgrade android. The problem is that the new loader does not allow downgrade android. The only option that I see - it is to unlock the boot loader. I ask your help in this. Help unlock the boot loader.
The bootloader is already unlocked. The problem is that different signatures were used within the mk3 bootloader, so downgrading changes the signatures and the system refuses to boot.
CNexus said:
The bootloader is already unlocked. The problem is that different signatures were used within the mk3 bootloader, so downgrading changes the signatures and the system refuses to boot.
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And how to fix this problem? The problem I have with this phone. Because modem firmware with MK3, my cellular operator is not able to connect this phone. Does not pass akey. I need to install an older version of the firmware. I ask your help.

so many unlock threads... so is a 4.3/4.4.2 sim unlock possible?

I've done a ton of searching for methods to unlock the I747m Canadian variant of the S3 and always get confused because I'm a not too tech savvy newb. Does anyone who cares to read this know if there's a method of downgrading the s3 to 4.1 ? I remember an ambiguous thread on how you can use mobile Odin to downgrade everything but the boot loader but I have no idea how that works or where I even found that thread. Can anyone point me in the right direction, if there is one?
Once updated to 4 3 you cannot downgrade or unlock for free
In order to use the free unlock method on an i747 or i747m, you need to be running a completely stock Samsung 4.1.1 ROM, including the 4.1.1 bootloader, to ensure that the phone actually gets unlocked.
If you have the 4.3 or higher bootloader, you cannot downgrade the bootloader. Attempts to downgrade the 4.3 bootloader to an earlier will probably brick your phone. Since you cannot downgrade the 4.3 bootloader, you cannot use the free method to unlock your phone.
Yes, you can use mobile Odin to downgrade the i747 and i747m Samsung ROM to 4.1.1 from 4.3 but your phone will still have the 4.3 bootloader which cannot be downgraded.
To sum things up: if you have the 4.3 or newer bootloader, you will need to buy an unlock code.

[Q] Telus SGH-I747M 4.4.2 UNLOCK

Hi Guy's I have done a bunch of searches and I am pretty sure that it is impossible. BUT if the first person to successfully guide me through the process I donate 10 bucks to. After it's done
If you have a 4.3 or 4.4.2 bootloader on your phone, you will have to purchase an unlock code.
Are you running stock 4.4.2?
audit13 said:
If you have a 4.3 or 4.4.2 bootloader on your phone, you will have to purchase an unlock code.
Are you running stock 4.4.2?
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Yes I am, and it is completely stock.
You'll have to purchase an unlock code.

[Q]Android 4.1 ROM, SIM Unlock?

Hello. I recently got my hands on a T-Mobile Samsung Galaxy SIII. The phone is network locked and I need to unlock it. I already rooted the phone.
However I have not been successful in unlocking the SIM. There is a method posted here on XDA which tells you to use the menu by dialing *#197328640#. However it won't work on the versions after Android 4.1
I was wondering if anyone can share with me where I can download the stock or a custom ROM with Android 4.1 so that I can use this method to unlock the SIM.
If you know of any other methods that don't require me to pay third parties please share them with me.
Thank you.
If the phone is running a stock 4.3 or newer bootloader, you cannot use the free method to unlock the phone.
audit13 said:
If the phone is running a stock 4.3 or newer bootloader, you cannot use the free method to unlock the phone.
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That's right. I was wondering if anyone could share with me a 4.1 bootloader because I wasn't successful in finding one.
You can't flash a 4.1 bootloader over a 4.3 or 4.4.2 bootloader. Trying will probably brick the phone.

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