*******Upgrading 4.1.1 to 4.2.1 or 4.3********HELP!!

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team_hob

Member
Dec 14, 2013
9
0
Hi Guys,

Here is a breakdown of the facts:

I have a SGH-I747 (Canadian version)

I wanted to unlock it so I downgraded and installed 4.1.1 (I747MUMLL1)
After, I realized that the 4.1.1 is outdated and don't like the layout...etc.

Now, I want to go back to 4.2.1 or 4.3.

What are the steps to install 4.2.1 or 4.3 ?
Do I have to root the phone before installing anything?


Any help would be appreciated.

Thanks
 

SaHiLzZ

Senior Member
Jan 19, 2011
2,000
516
either Odin to 4.3 or check system update in setting

sent from my mobile device
 

rx15901

Member
Feb 8, 2014
12
2
downgrade?

Hi Guys,

Here is a breakdown of the facts:

I have a SGH-I747 (Canadian version)

I wanted to unlock it so I downgraded and installed 4.1.1 (I747MUMLL1)
After, I realized that the 4.1.1 is outdated and don't like the layout...etc.

Now, I want to go back to 4.2.1 or 4.3.

What are the steps to install 4.2.1 or 4.3 ?
Do I have to root the phone before installing anything?


Any help would be appreciated.

Thanks

How did you downgrade?
...i've been looking around a a way to unlock on 4.3 but most info is for 4.1.1 and 4.1.2, do you remember how you did it?
 

audit13

Inactive Recognized Contributor
Jun 4, 2012
12,911
5,052
Toronto
How did you downgrade?
...i've been looking around a a way to unlock on 4.3 but most info is for 4.1.1 and 4.1.2, do you remember how you did it?

You cannot downgrade the bootloader, only the ROM.

It has been theorized that downgrading the ROM to 4.1.1 and keeping the 4.3 bootloader would give you the necessary options to unlock the phone using the free method, but no one has posted the results of doing this.

I couldn't find a ROM matching MUMLL1 but many ROMs are located here: http://www.sammobile.com/firmwares/1/?model=SGH-I747M&pcode=BMC#firmware
 
Last edited:

Larry2999

Senior Member
Feb 7, 2014
363
78
Atlanta, GA
You cannot downgrade the bootloader, only the ROM.

It has been theorized that downgrading the ROM to 4.1.1 and keeping the 4.3 bootloader would give you the necessary options to unlock the phone using the free method, but no one has posted the results of doing this.

I couldn't find a ROM matching MUMLL1 but many ROMs are located here: http://www.sammobile.com/firmwares/1/?model=SGH-I747M&pcode=BMC#firmware

I read in one of these threads that flashing via Mobile Odin, rather than desktop Odin, will flash the ROM but not the bootloader. Can anyone confirm if it is possible to safely downgrade from 4.3 to 4.1.1 via this method?
 

team_hob

Member
Dec 14, 2013
9
0
Look on samfirmware.com for stock ROMs for your carrier. The firmware must be flashed via desktop Odin.

I have downloaded lastest firmware for Telus from Sammobile.

Should I just use odin and install the new firmware? Do I need to do something to the ROM before I install the firmware? I'm a newbie to flashing so all the help would be help.

Thanks
 

audit13

Inactive Recognized Contributor
Jun 4, 2012
12,911
5,052
Toronto
I have downloaded lastest firmware for Telus from Sammobile.

Should I just use odin and install the new firmware? Do I need to do something to the ROM before I install the firmware? I'm a newbie to flashing so all the help would be help.

Thanks
If you are using an i747m, you can use Odin to flash the firmware.