If you are an owner of the Renesas 3 tablet, also known as NEC A9, Rena3, Cortex A9, oPad and tons of other names, you are probably as frustrated as I have been about the fact that it’s shipped with Android 2.2, with vague promises of an official 2.3 firmware by some websites.
Bad news – an official 2.3 firmware is not coming.
Bad news – an official ICS firmware is not coming.
However, I stumbled across a non-official 2.3.5 firmware for the Rena3, and it’s actually working great.
Downside – HD video will not play well on this tablet with 2.3 either. It simply does not have the graphical capacity needed hardware wise. A bit of a bummer if you, like me, happen to have 90% of all your video media in 720p or 1080p. TVersity and forced downscale of the video does the trick though, so don’t give up yet! :-)
To make sure we have the same tablet, please have a look at the pictures at the end of this post, and also note that my tablet has bluebooth and GPS. If yours does not, we don’t have the same and this firmware might not function properly. Please drop me a comment to this post if you want to double check our tablet HW configurations before proceeding.
My mirror of the firmware is available at https://www.engren.se/android/rena3/M9_20111220.rar (md5 bd6b31a158e1774128a69d4b29ca23f7) – read my notes below!
Unrar the file to the root of your SD card.
It consists of 10 files: android-fs4.tar.gz, cramfs4, cramfs4.tar.gz, ff4, install.sh, sdboot.bin, uboot4.bin, uboot-sd.bin, uImage4, update.conf
Please note! This procedure will completely wipe out ALL of the files/programs on your device except for the default programs that come with Android. I suggest backing up your “paid” applications and a few other things beforehand using “Titanium Backup” or something simular.
First of all, make sure that your Rena3 device is fully charged. Rumour says that anything below 50% in charge might give unexpected results.
Power off your device.
Insert the SD card. Yes, it’s a bit of a pain to do this. A paper clip can help!
Now, hold down the “volume +” button on your device, while pressing and holding the power button until the blue light indicator is turned on. Until this light has come on, both buttons must be held down!
Once the blue light has come on, release both buttons and wait while some yellow text on the screen is displaying the progress.
Eventually, after 5-10 minutes, you will see that the last text printed says “INSTALL COMPLETED” or something simular. At this time, press the power button for 10 seconds until the device powers off.
You should now be able to boot your Rena3 tablet to 2.3.5.