[Galaxy S III Q&A, Help & Troubleshooting] FrancisMTuazon:
The phone can boot into Download Mode and Recovery mode. I've been googling about this problem for like a week now. the first attempt that I did was using Odin and downloading the *.md5.tar for my phone. It gave me several errors:

<Download mode details on the top left corner:>

ODIN MODE

PRODUCT NAME: GT-i9300

CUSTOM BINARY DOWNLOAD: No

CURRENT BINARY: Samsung Official

SYSTEM OFFICIAL: Official

<Odin GUI Errors:>

[FAIL]

ID/COM: [COM9]

<ID:0/009> Added!!

<ID:0/009> Odin v.3 engine (ID:9)..

<ID:0/009> File analysis..

<ID:0/009> SetupConnection..

<ID:0/009> Complete(Write) operation failed.

<ID:0/009> Added!!

<OSM> All threads completed. (succeed 0 / failed 1)

Next I tried recovery mode. While entering recovery. I got errors also:

Starting Recovery mode errors:

E:failed to mount /efs (No such file or directory)

E:failed to mount /system (No such file or directory)

# MANUAL MODE #

-- Applying Multi-CSC...

E:failed to mount /system (No such file or directory)

can't mount '/system' (No such file or directory

E:failed to mount /cache (No such file or directory)

can't mount '/cache' (No such file or directory)

E:failed to mount /cache (No such file or directory)

Can't mount /cache/recovery/last_recovery

E:failed to mount /data (No such file or directory)

E:Can't mount /data/log/recovery_log.txt

E:failed to mount /system (No such file or directory)

E:failed to mount /cache (No such file or directory)

E:Can't mount /cache/recovery/log

E:Can't open /cache/recovery/log

E:failed to mount /cache (No such file or directory)

E:Can't mount /cache/recovery/last_log

E:Can't open /cache/recovery/last_log

E:failed to mount /cache (No such file or directory)

E:Can't mount /cache/recovery/last_install

E:Can't open /cache/recovery/last_install

E:failed to mount /cache (No such file or directory)

<After those errors stop appearing. The top part gets replaced with:>

Android system recovery <3e>

Volume up/down to move highlights;

power button to select.

reboot system now

apply update from ADB

apply update from external storage

wipe data/factory reset

wipe cache partition

apply update from cache

----------------------------------------

<When selecting "Apply update from ADB sideload / cache / external storage (also known as sdcard)". Errors are:>

E:failed to mount /system (Block device required)

E:failed to mount /cache (Block device required)

<If ADB is selected. the last lines say:>

Now send the package you want to apply

to the device with "adb sideload <filena

me>"...

<If external storage is selected. the last lines say:>

E:failed to mount /sd card (No such file or directory)

<When selecting "wipe data and fatory reset and/or wipe cache partition". Errors are:>

E:format_volume: make_extf4fs failed on /dev/block/MMCBLK0P12

E:format_volume: make_extf4fs failed on /dev/block/MMCBLK0P8

Please help :( :( :(

UPDATE: While I'm attempting to restore the *.zip update with ADB. The process goes to:

loading update.zip

sending update.zip ?? % (with underscores spazing from left to right)

and then looking from the phone.

it says:

<<<some things that I forgot after the sideload. the errors goes too fast for me>>>

Installation aborted

E: Can't mount /cache (Block device required)

E: Can't mount /system (Block device required)

E: Can't mount /efs (Block device required)