RIFF JTAG - Samsung S3, S4 KNOX Downgrade warning and repair instructions ! ! !

Hello dear RIFF Box users !

As many of You already know, the KNOX enabled firmware brings many new features, some of them giving headaches to users and repair shops.

Most important for us are the following:

- Downgrade is not possible anymore
- Warranty void status (0x1)

To prevent any possible problems, always create backup using RIFF Box and it's DCC TAB functions.
For bot S3 and S4 models, 128MB from ROM1 is enough.

- Select ROM1
- Set address to 0x0000 0000 0000
- Set data length to 128MB from drop down list
- Click "Read Memory" and "Save" once it's finished.

Remember that restoring backup will not set back warranty void status to 0x0, if it's already triggered !

In case that You do not have backup, please follow these instructions:

- Determine latest version available for Your model, and download firmware (zip or md5 file)
- Extract firmware using 7zip
- Launch JTAG Manager and start eMMC plugin
- Click "Load layout from device" and wait for partitions list to be loaded
- Inject SBL1 (if exist), SBL2, SBL3, RPM, TZ and ABOOT files into corresponding partitions
- Select injected partitions by double click
- Click "Flash Selected"

This will restore phone bootloader and allow You to start phone in download mode.

In case that You can not find latest firmware, but You have working donor phone with required version, simply write 128MB backup to ROM1, or write above listed partitions using eMMC plugin.

This manual applies to following Samsung Galaxy S3 and S4 models, based on QUALCOMM chipsets:

• SCH-R530
• SCH-I535
• SCH-i535v
• SPH-L710
• SGH-i747
• SGH-i747M
• SC-06D
• SC-03E
• SGH-T999
• SGH-T999L
• SHV-E210K
• SHV-E210L
• SHV-E210S
• GT-i9505
• SGH-i337
• SGH-i337M
• SGH-m919
• SCH-i545
• SPH-L720
• SCH-R970
• SCH-R970x
• SC-04E

RIFF JTAG eMMC plugin instructions:
http://faq.riffbox.org/content/10/53...ng-plugin.html

RIFF JTAG Manager DCC TAB instructions:
http://faq.riffbox.org/content/9/59/...write-tab.html

You can download from here some of the required files. In case that You have some version which is not listed here, please upload it.

BL_I747UCUEMJB_2024954_REV04_user_low_ship.tar.rar
boot_CWM_I747MVLUEMK5.zip
I545VRUDMI1.rar