I have an ASUS Transformer Pad TF300T with Android 4.0.3 installed. I want to upgrade my android version to Android 4.2. I think I can do this by upgrading the firmware.
So, I went to Settings --> About --> Update system firmware (or something like that), clicked 'Check update'.
Result: no update available.
So I thought there was something wrong with my OTA updating. I didn't have a problem with updating the firmware manaully.
I downloaded the last firmware (WW_V10.6.1.27.5) from the ASUS site for my build (IML74K.WW_epad-22.214.171.124-20120604). I guess my build is WW, I don't know what IML74K is.
I googled some ways to install it, and I saw the method with the Micro SD card. I unzipped the file (once, yes), and I updated my firmware by clicking the warning icon in the right corner.
When I did that, my tablet turned off and turned on in recovery mode. With an error:
E:Invalid command argument
OS will cold boot in 10 secs if the selected mode is not confirmed.
Press <VOL_DOWN> to change mode.
Press <VOL_UP> to confirm mode.
(Here I selected and confirmed USB)
Starting Fastboot USB download protocol
Then I typed this in cmd:
C:\Users\JohnDoe> cd "C:\Users\JohnDoe\Documents\Fastboot"
C:\Users\JohnDoe\Documents\Fastboot> fastboot -i 0x0B05 flash staging blob
sending 'staging' (800923 KB)...
FAILED (remote: ()
finished. total time: 157.663s
Failed to process command flash:staging error(0x170003)
So my question is: how do I upgrade my tablet?
I hope I gave enough information, if something is still unclear, ask it please!