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Published on March 30th, 2013 16:05

Cube U30GT2 quad-core tablet gets firmware update, custom ROM treatment

The Cube U30GT2 is a 10 inch tablet with a Rockchip RK3188 quad-core processor and a 1920 x 1200 pixel display. It ships with Android 4.1 Jelly Bean and seems to function pretty well — although in my initial tests, I found the WiFi range wasn’t very good.

Fortunately Cube has released a firmware update, and among other things software version 1.03 seems to improve WiFi performance a bit. And if that isn’t good enough for you, the first custom ROMs for this tablet are also now available.

To be honest, there doesn’t appear to be a huge difference between the two custom ROMs available so far. Both are based on the 1.03 firmware, and both include root access and a few other tweaks. (You can also just root the Cube U30GT2 without installing a custom ROM if you’d rather do that.

Both of these custom ROMs will also wipe any data on your device, (as will installing the official firmware update), so make sure to remove any microSD cards and backup any apps or data you can before you start.

Here are the two options available for custom ROM flashers as of

ArcTablet Cube U30GT2 custom firmware

The folks at ArcTablet have tweaked the Cube tablet’s software by setting the default language to English, removing most Chinese apps from the system image, and fixing the Google Play Store so that most apps show as compatible with this tablet.

I didn’t exactly have problems finding compatible apps using the stock firmware — most of the apps I searched for were already available.

The ArcTablet ROM also comes pre-rooted and features SuperSU 1.25.

Cube U30GT2 900supersport 1.1 ROM

FreakTab forum member 900supersport has created a custom ROM which makes many of the same changes.

It’s pre-rooted and features busybox and init.d. This ROM also features UK English as the default language, and offers Google Play Store fixes. By removing some Chinese apps and other bloat, there’s now

Installing a Cube U30GT2 firmware update/custom ROM

You can install the official software update or the ArcTablet ROM by using the Rockchip Batch Tool 1.6 with support for devices featuring the Rockchip RK3188 ARM Cortex-A9 quad-core processor.

The tool is designed to work on a PC running Windows 2000 or later.

You can download the Rockchip Batch Tool from GeekBuying. Once you’ve done that, decompress the file using 7-zip or a similar utility. You may need to enter the password “GEEKBUYING.COM” when you do that.

ArcTablet also has a download link for the Rockchip RK3188 tool, with no password required.

Installing stock ROM update or ArcTablet ROM

Next, follow these steps:

  1. Shut down your tablet.
  2. Remove any microSD cards.
  3. Make sure the tablet’s not plugged into your PC.
  4. Press and hold the volume+ button on the tablet while plugging the tablet into a PC with a USB cable.
  5. Do not lift your fingers from those buttons until your computer detects new hardware.
  6. If prompted to install a driver, navigate to the Rockchip Batch Tool folder and look in the RockusbDriver folder for the appropriate driver for your PC.
  7. If you’re not prompted, you may need to go into the Device Manager, look for an unknown device, and install the driver manually by using the “have disk” option.
  8. Once the driver’s installed properly, you can run the RKBatchTool.exe program. You’ll know everything’s working properly if the box marked “1″ under “Connected Devices” is green.
  9. Click the … icon next to FW Path to find the appropriate .img file.
  10. Click the “upgrade” button.

After that, the program should send data to your tablet and a few minutes later it will reboot into Android.

The trickiest part may be installing the drivers and connecting your tablet. I had a lot of trouble getting my PC to recognize the Cube U30GT2.

Here something I discovered which may help: The screen won’t turn at all when you press and hold the power and volume+ buttons. You won’t see an Android logo, a Cube logo, or anything else.

That can make it tough to tell if you’re doing things right… but if you start to see any sort of logo, you’re going to have to shut down the tablet and try again.

I also had a number of problems getting the drivers to install properly. You may have to go through steps 6 or 7 multiple times before things work. Or maybe that’s just me.

Installing 900supersport ROM

If you’re using the 900supersport ROM you’ll still need to install the RockUSB drivers following the first few steps listed above. But instead of using the RKBatchTool.exe to start the upgrade process, you use the RKAndroidTool which 900supersport bundles with his ROM.

It will load all the components of this ROM (including the system, boot, and recovery partitions) and all you have to do is hit the Flash ROM button to get started.

Thanks again to Geekbuying for providing me with a Cube U30GT2 tablet to test. Geekbuying also sent a tablet to 900supersport to help with development of custom ROMs.

You can buy the Cube U30GT2 from Geekbuying for $269.

Cube U30GT2 quad-core tablet gets firmware update, custom ROM treatment is a post from: Liliputing


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