Tutorial: How to flash International rom on Galaxy S3, GT-I9300_CHN_CHN (From CHINA)

If you are a proud owner of a Samsung Galaxy S3 (GT-I9300), but unfortunatly, your S3 was brought from china, maybe you have the versión GT-i9300_CHN_CHN.
This Version of Galaxy S3, has the bootloader blocked, then we can not flash international firmware in this model, because odin fail in modem.
In my first steps, i found a post with a firmware mixed a French files, and China Files in one Rom (thanks to XDA). But with ICS, ( 4.1.1). So because i like put he newest, i search around the net, and XDA, and i found some ways to do that.
This is the tutorial to do that.

STEP 1.
You Need to confirm, if really you have the Gt-i9300_CHN_CHN.
Put your Mobile on Download mode ( it show in chinese) and press Vol+, in the same way you do when you flash with Odin. (to enter Download Mode press: Vol-, Power; Home)
In the Screen Must appear PRODUCT NAME: GT-i9300_CHN_CHN, It´s means, you have a Chinese Version ( its International, But Chinese).

Another way its Pressing in your Phone *#1234# and its show your versión.
The latest version on china is:

GT-I9300 Galaxy S III
PDA: I9300ZCEMD2
CSC: I9300CHNEMD2
MODEM: I9300ZCELL1
Added: 2013-04-14

The Official Link from samfirmware:

http://www.hotfile.com/dl/204467117/...2_CHN.zip.html

http://www.hotfile.com/dl/204467117/...2_CHN.zip.html
STEP 2.
Download the Latest CHINA FIRMWARE. and the firmware you prefer, I use the Spain (PHE)
The Official Link from Samfirmware:

Model: GT-I9300
Country: Spain
Version: Android 4.1.2
Changelist: 1287119
Build date: Thu, 27 Jun 2013 15:44:00 +0000
Product Code: PHE
PDA: I9300XXEMF6
CSC: I9300PHEEMF1
MODEM: I9300XXEMF6

Here is the Official Link from samfirmware:

http://www.hotfile.com/dl/233642717/...1_PHE.zip.html



STEP 3.
Once you have both firmwares ( china and your preferred firmware), you need to change the extensión of both files, you need to unrar your files, then you have something like this:
CHINESE FIRMWARE:
KIES_HOME_I9300ZCEMD2_I9300CHNEMD2_1133994_REV00_u ser_low_ship.tar.md5
SPAIN FIRMWARE:
I9300XXEMF6_I9300PHEEMF1_I9300XXEMF6_HOME.tar.md5

You need to delete the extensión .md5, it must have only .tar, just rename in Windows.
Then the both files we use are:
KIES_HOME_I9300ZCEMD2_I9300CHNEMD2_1133994_REV00_u ser_low_ship.tar
I9300XXEMF6_I9300PHEEMF1_I9300XXEMF6_HOME.tar
STEP 4.
Once you renamed both files, you need to unpacking.
To unpack your firmwares, you can use WINRAR, or another software who can work with tar files.
Or you can Use TOTAL COMMANDER, ( i prefer Total Commander)

https://mega.co.nz/#!WcUW3AbK!Y7yAFE...em--FH28t5ifWY

STEP 5.
Once you have both firmwares unpacked, ( in diferent folders), you have to use some files from CHINA, and some files from Spain
In Both Folders we have these files:

Boot.img
Cache.img
Hidden.img
Modem.bin
Recovery.img
Sboot.bin
System.img
Tz.img

STEP 6.
From the China Firmware, I used these Files:
Sboot.bin
Tz.img
Modem.bin

From the Spain firmware, I used the rest of the files:
Boot.img
Cache.img
Hidden.img
Recovery.img (recovery can be omitted if you have a custom recovery and you don't want lose it)
System.img
We need put these files together,, if you have some software to pack files in Tar, Use it! ( with winrar you can only unpack, but you cannot repack)
In this step, i still Using Total Commander.

With total commander, you must put your files in the same folder, and click on PACK FILES.

The file resultant, is a tar file, ( you can rename the file as you want)
This file is flasheable by ODin, put in PDA just like another firmware. And flash it as the same way you know.
Remember: this is important: before you flash, you must do Factory reset, and format cache partition, in order to have a clean installation. ( many people dont do that, and after time, the mobile seems to have bugs, it is because need factory reset, and cache partition, so, DO IT!)
Once ODIN finish to flash, you must have a Galaxy S3 CHN, with Nordic Countries firmware, but with modem, and bootloader chinese.
There is Another Way to pack and unpack tar files, if you use Linux, search XDA for this, or you can use CYGWIN, wich is a Linux Console for Windows. ( search in XDA too)
With CYGWIN you can unpack and pack in tar and generate md5 checksum firmwares.

You Can change your firmware in other way too.
First you need to flash the CHINA firmware as it comes, without modifications.
Next you only need to open the Nordic Countries Firmware, with total commander, and delete, modem.bin, tz.img, sboot.bin, the rest of files still in rom. You can delete recovery too, if you have a custom one. (don’t forget backup the original file)
Then, Flash this rom without modem, via ODIN, in PDA, y that is all!.
Next you need to do Factory reset and Format Cache partition.



Note: CAUTION!, Backup your EFS folder, just in case.

The NEE firmware, i use to make this tutorial, it seems to be incompatible with chinese versión, ITS DELETE MY IMEI, because of that i return to older custom rom i made with: I9300XXEMF6_I9300PHEEMF1_PHE.

I EDIT THIS POST TO CHANGE THE LINKS, SO ALL THE LINKS ARE THE GOOD ONE USING SPAIN XEEM6.
THIS WORKS FINE, TESTED BY ME,

Here is a Pic.
as you can see:
Baseband Versión Is: I9300ZCELL1 (china)
Build Numer:
JZO54K.I9300XXEMF6 ( spain)





Enjoy

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