Chinese tablets have earned a reputation for a few things. They’re usually much cheaper than big-name tablets from companies you’ve heard of. And while they might have great specs on paper, they don’t always offer the same kind of build quality, performance, or software you might expect from an Apple, Asus, or Samsung tablet.

But the Cube U30GT2 comes pretty close to bucking the trend. It offers great specs at a decent price, and with a few minor exceptions, it performs as well or better than some of the best big-name tablets on the market.

Cube U30GT2

The 10 inch tablet features a fast quad-core processor, a high resolution display, decent battery life, and acceptable build quality. Geekbuying sells the tablet for $269, which is well below the cost of a 10 inch tablet from Asus or Samsung, and even lower than the price of an iPad mini.

But there a few things to consider before spending money on this tablet. It doesn’t come with the same kind of support you might expect from a bigger-name device, WiFi performance is a bit iffy, and the tablet doesn’t yet run the latest version of Android.

Geekbuying sent me a tablet for the purposes of this review.


Last year Cube was one of the first companies to release tablets with a Rockchip RK3066 dual-core processors and iPad-like 2048 x 1536 pixel displays. In 2013 the company is still ahead of the curve: The Cube U30GT2 was one of the first tablets to ship with Rockchip’s new 28nm RK3188 ARM Cortex-A9 quad-core processor.

As I discovered when I started benchmarking the tablet, that makes the U30GT2 one of the fastest Android tablets on the market, outperforming devices with NVIDIA Tegra 3 and Samsung Exynos 4412 quad-core chips.

That’ll change soon as we start to see more tablets with ARM Cortex-A15 processors. But suffice it to say that the RK3188 chip is one of the fastest ARM Cortex-A9 chips you’re likely to find anytime soon.


But the fast chip isn’t the only thing that makes this tablet special. It also features a 10.1 inch, 1920 x 1200 pixel IPS display, a 10 point capacitive multitouch panel, 2GB of RAM, and 32GB of storage.

It has a 5MP rear camera with LED flash and a front-facing 2MP camera. And the tablet has mini HDMI and microSD card ports, in addition to a micro USB port.

The Cube U30GT2 features 802.11n WiFi and Bluetooth 2.1, and has a 7200mAh battery.

It doesn’t have GPS or 3G functionality, and it runs Android 4.1 Jelly Bean instead of the newer Android 4.2.


Cube’s tablet is basically a slab of white plastic, gryy metal, and glossy glass. The front of the device is covered with a single pane of glass which stretches nearly from edge to edge (there’s a thin strip of plastic around the border of the tablet.


There’s a white bezel around the display, with a 2MP in the center of the top and a light sensor in the upper left corner.

The screen’s a bit of a fingerprint magnet, but that’s true of most tablet displays.


A strip of metal covers each side of the tablet, but the sides look like a mix of gray and white since you can also see the plastic bits above and below the metal.


If you hold the U30GT2 in landscape mode, all the buttons and ports are on the left side, including plastic buttons for volume and power.

The tablet also has stereo speakers, and you can find one of the speakers between the ports on the left side, while the slots for the speaker on the right side are a bit tougher to spot — there are two very slim notches in the plastic above the metal strip.


There’s also a power jack on the left side of the tablet — and you’ll need to use it. You can’t charge the Cube U30GT2 using the microUSB port. That’s just there for connecting the tablet to a PC or hooking up other peripherals.


On the back of the tablet you’ll find the 5MP camera and LED flash, as long as Cube’s rather whimsical-looking logo.


If you push down in the middle of the rear panel, you can feel the plastic flex a bit. But it’s not the sort of thing you’ll notice while holding the tablet by its edges.

Measuring 10.3″ x 6.7″ x 0.4″ and weighing 1.5 pounds, this isn’t the thinnest or lightest 10 inch tablet on the market. But it’s also not exactly big or heavy.


Cube ships the U30GT2 with Android 4.1 Jelly Bean. If you buy it from a company that ships to English-speaking countries, odds are that English will be set as your default language. But the tablet will still include some Chinese language apps. And if you perform a factory reset, the default language will switch to Chinese.

If that happens, just follow our guide for changing the language on an Android tablet. It’s pretty easy to do, even if you’re navigating through menus in a language you don’t understand.

The tablet does come with the Google Play Store preloaded, so you don’t need to hack it in order to access hundreds of thousands of free and paid apps that are available for download from Google’s store.


But if you want, you can also root the Cube U30GT2 or install custom ROMs on the tablet. Right now installing custom firmware gives you a ROM that’s pre-rooted, has English as the default language, and may have some performance improvements.

Eventually we may see custom ROMs with other features, including support for different versions of Android. The same tool you can use to install a custom ROM will also let you install official firmware updates from Cube as they’re released.


In terms of raw processing power, the Cube’s Rockchip RK3188 outperforms most other ARM Cortex-A9 chips on the market. That’s not too surprising, since it’s one of the most recent Cortex-A9 chips to be released. But it’s still a rather impressive showing for a company that has little name recognition in the West, where Samsung, NVIDIA, Texas Instruments, and Qualcomm are bigger names.

I ran a series of benchmarks, including Quadrant, CF-Bench, and Antutu, and the Cube U30GT2 scored higher than the Asus MeMoPad ME301T or Google Nexus 7 (which both have NVIDIA Tegra 3 processors) or the Ramos W42 (which has a Samsung Exynos 4412 chip).


But benchmarks don’t always tell the full story. The good news is that the Cube U30GT2 feels as fast as you’d expect a tablet with those scores to feel.

Apps launch quickly, the user interface feels pretty responsive, and I haven’t found many apps that wouldn’t run on the tablet.


I was able to stream video from Netflix and YouTube without any problems, including high definition videos. And the tablet makes a pretty decent eReader if you install an app like the Amazon Kindle app for Android.


Games including Dead Trigger look pretty great on the tablet’s high-resolution display… although I’m not very good at staying alive through zombie invasions. I just like to test a game with slightly better graphics than Scrabble when checking out a tablet.

Likewise, the high resolution screen is great for viewing pictures, reading books, magazines, or digital comics (although I still prefer print to digital for comics and magazines, since most digital versions basically try to shrink an 11 inch or larger page to a 10 inch or smaller screen).


Cube estimates that you should be able to get 7 to 8 hours of battery life, and that seems about right in my tests. If you’re using it to read eBooks with WiFi disabled and the screen brightness set to 50 percent or lower, you could probably get even longer battery life. But while streaming about 45 minutes of video from Netflix, the battery meter dropped from about 95 percent to 80 percent.

I did experience two performance problems with the tablet in my tests. The first is poor WiFi range. I keep my wireless router in the first floor of our house, but my office is on the third floor.

When the Cube U30GT2 first arrived, I couldn’t get it to connect to the internet at all from my office. I couldn’t even get past the login screen where you’re asked for your Google credentials. The tablet worked just fine in the living room, but since I prefer to work in my office, I found myself not using the device very much at first.

Once I installed a firmware update (and then a custom ROM) designed to improve WiFi performance, among other things, I was occasionally able to connect to the internet from my office. But the connection was iffy, and would frequently time out.


This still may be a software bug rather than a problem with the hardware. The tablet tends to report that I am connected to my home network even while it refuses to load websites, stream video, or login to my Google account.

If you plan to use the tablet closer to your router than I do, this may be a non-issue. But in my case, it limits the Cube tablet’s usefulness.

The other problem is that the tablet has occasionally rebooted on me for no apparent reason. This may be due to the custom ROM I’m running, so I can’t say if it’s something that would happen if you use the tablet with the stock firmware. But it’s not a huge problem, having only happened twice during the past few weeks.


When you spend money on a cheap tablet from China, you tend to get what you pay for. For less than the cost of a name brand device, you sometimes get buggy software or inferior build quality, and often get limited support from the manufacturer.

But the Cube U30GT has decent build quality, excellent performance, and the manufacturer has already released a firmware update. There are also at least a few independent developers working on custom firmware for the tablet, so even if Cube were to abandon support for this model, there may still be new custom ROMs with additional features from independent developers.


Knowing that the WiFi reception is poor when used in the third floor of my house, I’m not sure I’d spend $269 to pick up this tablet for myself. But it’s a nice enough tablet that I’d be tempted to just invest in a WiFi range extender for the house.

You can pick up the Cube U30GT2 from Geekbuying for $269.

It’s also available from a number of AliExpress vendors for $250 and up (although Geekbuying has one of the best prices available, since the store offers free shipping).

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19 replies on “Cube U30GT2 quad-core tablet review”

  1. Dear reader,

    the one who wants to buy a cheap Chinese tablet, I want to share with you my sad experience.

    I ordered a tablet Cube U30GT2 RK3188 Quad Core Tablet PC Bluetooth HDMI 10.1 Inch online

    After two weeks, I got a tablet was found that the headphone output does not work – there is no sound in the headphones.

    A month later, a tablet ceased to find WIFI network and every time after reboot the date and time changed to something strange.

    I wrote to the Cube five letters in response I was offered to do a variety of tasks: like return to factory settings,

    Of course that did not help either.

    On my demand to replace the defected tablet on the serviceable so far received no reply.

    So, first I advise you not to deal with this website, and secondly a tablet from a Cube full of shit.

  2. i bought the this tablet a week ago end september 2013 and the wi fi is terrible, wont connect unless in same room and only 10ft from router and even then its a bit hit and miss.
    also a biggy and confirmed by cube supplier THE CUBE DOES NOT PLAY NETFLIX MOVIES, you can download the app but the movie quality is unwatchable. the unit also sticks a lot and needs to be switched off and restarted this happened a few times within a mattert of hours.
    no back up from suppliers, worst buying experience of my life, will not be buying from china again.

    1. U need to sort or rooter out m8 I’m on BT which isn’t brilliant and never had a problem with Netflix BBC ITV 4od have you tryed updating to 4.2 that’s what I’m running and never had a problem it an amazing pad that takes the mic out of Samsung pads by a mile

  3. Why does Cube-Tablet fail to stand behind this product and why does Cube-Tablet fail to provide honorable customer service??? After I bought one of these tablets the battery went totally dead and has proven after many tests to be DEFECTIVE. For weeks Cube-Tablet has failed to react to emails regarding this subject. I repeatedly ask that they send us a replacement battery, and they continue to change the subject and say I ought to download the new firmware. The tablet will NOT BOOT UP and the black screen displays a defective battery icon symbol and both of our chargers are putting out the correct voltage. Cube-Tablet refuses to provide a new battery and they refuse to pay shipping costs for a return. In fact, after all this, they still say to “install firmware” as if a software update could restore a defective battery. NEVER TRUST Cube-Tablet. They are TERRIBLE.

  4. cube u30gt2 only have one side speaker at the right , please do not mislead people , thank


  5. Got mine 4 days ago. This tablet is extremely limited due to it’s very
    limited wifi range. I’ve complained to GeekBuying and (finally) recieved
    replies telling me to check my router. This tablet has to practiccly be
    in the same room as a router to surf or stream video.

    Here’s my theory of why this tablet sucks…….and why I WOULD NOT buy
    it had I known about it constantly dropping signal if not right next to a

    If you compare the Cube U30GT2 to other retina display tablets such as
    the kindle or nexus 10, you will notice that the Cube does not deploy
    MIMO type wifi antenna systems- (multiple in – multiple out
    channels/antennas). I suspect this is not simply for faster downloads or
    better wifi performance over distance. More likely, a retina display
    tablet only performs correctly when the wifi signal is strong enough
    with maximum bandwidth……….which is required when pushing that many
    pixels around.

    The Cube on the other hand, is not pushing quite the pixels of the nexus
    10, but enough to where it’s wifi chipset must govern operation
    —–meaning a signal must either be strong enough (with enough
    bandwidth) to push the pixels…….or instead drop the signal so not to
    affect the screen resolution.

    To my knowledge, there IS no screen resolution adjustment on the
    u30gt2…….which (might) in theory, make possible greater wifi range
    if only the wifi chipset governed accordingly.

    Cube’s haste to put out a retina display tablet….. but at lower cost
    had it’s drawback. If you don’t pay for the mimo wifi antenna system,
    then wifi distance is sacrificed. Might be that for many people sitting
    near the router in their homes playing games or surfing the net, the
    Cube is quite satisfying.

    But my feeling is that Cube missed the boat here. IMO, most people want
    to take their tablet for on the go and to be confident of good wifi

    For an extra $15 (guessed), should Cube have designed the mimo system
    into their tablet?

    My answer is YES.

  6. Can you install ubuntu on this? I mean full desktop ubuntu not ubuntu touch

  7. Bought mine from geekbuying because I bought an imoto mx1 from there. Shipping takes forever. I bought it the day it was released. Its not here yet, but should be here by the 25th. Haha. Geekbuying is a good company, the always respond to my questions within a day, even though sometimes I can’t always understand what they say. I have boughten 1 thing from them from their site, and two tablets from their amazon for my daughters, they always take forever to get here, but they always work and they are always what they say they would be.

  8. If you’re having problems with wi-fi in your office, get a pair of Devolo AVMini’s and a small router – should sort the problem for less than £50.

  9. All that processing power isn’t going to make a jot of difference with unstable/inefficient software behind it and bad build quality. “Wirth’s law”?

  10. I’m keep to get one but am hesitant about buying something a little unknown, if anyone else owns one and could post info that would be very helpful!

  11. Cube also has a 9.7″ retina version with 10000 mah with 10 hrs battery life. UI isn’t as smooth as this one but its a trade off.

  12. I’m really interested in the battery capabilities of this device down the road. It sounds like a solid deal, but I’m so hesitant to put my money behind anything coming straight out of China. Please keep us posted! Your site has been a daily visit for me since I picked up my trusty Asus eee 1000h almost five years ago.

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