First I have lost one afternoon because of a bad USB cable. When I was trying to upgrade my phone
with fastboot after the 'sending bin' message nothing was happening. Other fastboot commands which
did not involve massive transfer of data wew working fine. I took me a while to figure out that the culprit
was a chinese 2m long USB cable. After I've changed it with another shorter cable everything was fine.
So others be aware.
My Device CPU type is 8260a-3
- I've used leaked firmware Acer_AV051_S500_RV14RB02_WW_GEN1 to flash my phone,
- Then I've unlocked the bootloader: 'fastboot -i 0x0502 oem unlock'
- Flashed the recovery: 'fastboot -i 0x0502 flash recovery CWM-188.8.131.52_S500.img'
- and then the patched boot: 'fastboot -i 0x0502 flash boot boot.img'
Now I want to upgrade to the latest JB available: Acer_AV051.S500.RV04RC09.WW.GEN1
Because I don't want to loose the unlocked bootloader I have used this time the
Acer_Download_Tool_3.006 for Windows (as oposed to my Linux prompt). I did this because
I saw a tickbox in the ADT software which says "flash bootloader before image' so I have unchecked
that tick and flashed with RV04RC09. Unfortunately this replaced the bootloader and the CWM recovery
regardless of my not-ticked option.
So what is the correct procedure to do this update and not lose the unlocked bootloader?
Are there any tools to edit the firmware binary files?
What is the content of the xxx_1.bin and xxx_2.bin files which are present in all the firmware releases?