Download the Android 4.0 firmware from here:
Android 4.0 Firmware Download

Download and don’t unzip. Change the filename to update.img (all lowercase).

Please ensure that you don’t have your computer set to hide filename extensions.

1. If you are using Android 2.3 (as long as the Uboot version is 20111102 or later version in setting->about device), please copy the file onto an SD card and insert into the box. Then go to setting->privacy->update system to update firmware directly. The box will restart once complete.

2. If your box is working with the Android 4.0 beta version, please copy the file onto an SD card or USB disk and connect to the box. Next, run the Upgrade app (there is an Upgrade icon on 4.0), and select update.img file in local update option to upgrade.

3. If you want to downgrade to android 2.3:
A: Download below firmware Android 2.3 for Cyclone Nano

Don’t unzip it- change the filename /format to update.img, the same as the upgrade steps as above.

Fixed problems base on Android 4.0 beta version:
1. Enlarged mouse icon
2. Fixed no audio on Ypbpr output mode issue
3. Fixed some buttons did not work on remote control issue
4. Updated Flash player 10.2 which supports hardware decoding ICS version

Please note CVBS output/USB camera/3G dongle/Geniatech’s TV dongle have not been supported yet.