Cubot rainbow 2 review -For under 70 € you get a quite usable device

If you think it is no longer cheaper, the Cubot Rainbow 2 comes suddenly. With a price of less than 70 €, Cubot tries to attract smartphone beginners and hard-hitting savings. It is amazing that a dual camera was installed. In other places, however, savings are saved. For example, only 1 GB RAM and a budget processor are available. LTE is also completely dispensed with. Whether or not the 5-inch smartphone can be good for the ridicule price, the test should show.

Processing and design

The Cubot Rainbow 2 does not dare a great deal with the look and is best described with the adjectives simple, but noble. The dimensions of 144 x 72 x 7.9 mm allow operation with one hand. Haptically makes the smartphone an outstanding impression. The rounded edges and the slim design contribute to the comfort of the hand. The smartphone feels good and you are not afraid that it slips out of your hand. The Cubot has an average value of 155 grams. Hand cramps and muscle soreness I can definitely exclude for normal users.

Only when you hold the smartphone in your hand, notice that the chic aluminum frame is not one. Unfortunately, it consists only of plastic, as well as the loudspeaker rocker and power button. They sit firmly in the housing despite the material and have a pleasant pressure point. The positioning of the micro USB port is rather unusual, because it is located at the top edge of the Rainbows next to the headphone connection. This fact proved to be an advantage in practical use. The inexpensive pocket computer could still be used very well when it was charged simultaneously and headphones were used. There is no problem that a cable at the lower edge hinders operation.

Like the frame, the back is made of plastic. The high-gloss back cover has a fingerprint and scratch-repellent color layer according to the manufacturer. At least scratches could not be determined, during very careful treatment, during the test period. Touching the finger, however, leaves clearly visible traces. The dual camera is minimally out of the case and is elegantly surrounded by a filigree silver frame. The back cover can be removed. Below are two Sim slots and one SD card slot. The battery is unfortunately still firmly installed.

The front is completely covered by a rounded glass on the edges. There are three non-illuminated soft-touch buttons under the display. A blue notification LED indicates missed calls and other notifications.

The Cubot Rainbow 2 is not available in all rainbow colors, but the color selection can be quite impressive. It can be ordered in the five versions gold, red, blue, black and white. All versions are the same hardware hardware.

Scope of delivery of the Cubot Rainbow 2

In addition to the Rainbow 2, Cubot also packs a micro USB cable and, of course, a suitable charging adapter into the cardboard box. A display foil is attached from the front of the display. Very attentive of Cubot. Everyone who has already attached such a film knows what kind of work is (especially for perfectionists). In addition, a TPU cover is included, which consists of a plastic-silicone mix. This material is known for its resistance and durability. The Quick Start Guide also gives you a brief introduction to the operation of the device.


The Cubot Rainbow 2 can be equipped with an HD display (1280 × 720 pixels) and a pixel density of 294 pixels per inch. It dissolves sufficiently sharply, so that you can enjoy multimedial content in any case. It is striking that there is a visible gap between the installed 2.5D glass and the IPS panel. The display does not seem to be glued directly to the glass. This is a disadvantage, above all, for the readability under solar irradiation. Despite a pleasantly high display brightness, content is difficult to read when the sun is shining on the display. The viewing angles, on the other hand, are stable and colors represent the Cubot Rainbow 2 nicely. Contrasts could be partly stronger. Thanks to Mira-Vision, however, the presentation can be adapted. If you customize the settings and do not use the default configuration, you can get some things from the display.

Gorilla glass does not offer the rainbow smartphone unfortunately. If you want to avoid scratches, you should definitely use a screen protector film, or simply do not peel the film attached by the manufacturer. A smart wake up of the display succeeds by gestures or taps on the display. On the other hand, the extraordinary multitouch capability of the Cubot Rainbow 2 is surprising. 10 touches are recognized simultaneously and reliably. In contrast to many low-budget mobile phones, the smartphone can therefore be used 100% reliably and is also suitable for multiples.

All in all, Cubot gave the Rainbow a very useful display in the ultra-low-budget area. A FullHD display should not be expected in this price segment.


Performance is there on the Cubot Rainbow 2 in everyday use nothing to complain about. Especially the navigation through the menus. Everything runs smoothly, applications are loaded fast enough, and joggers stay out of scrolling. This is ensured by the budget processor MediaTek MT6580A with four 1.3 GHz fast cores. This computing unit, together with the Mali 400 graphics unit, of course does not perform masterpieces in games such as Asphalt 8, or Modern Combat 5. With NOVA 3, only a 3D crash could play smoothly. Less complex games, e.g. Mario Run is really fun on the smartphone. More was not to be expected at this price. The below average Antutu benchmark of 24500 points is therefore not a big surprise. Heat development is limited. The rainbow never became unpleasantly hot. Only when the unit is operated while the battery is being charged is a significant warming of the back.

In the settings, Cubot provides the “DuraSpeed” feature, which terminates background processes, in order to provide as much power as possible to the currently active application. Since the memory with 1 GB is rather narrow, not many processes, or apps can run at the same time. A performance test of the memory showed rather below average values. At a RAM speed of 1.5 GB / s one can not really be proud. The internal flash memory is also not the fastest. The read and write speed of 30-40 MB / s looks the same (in the negative sense).

In summary, the Cubot Rainbow 2 provides sufficient performance for a smooth operation in everyday tasks such as surfing, watching videos or small occasional games. Only in graphically complex games do performance weaknesses.

Rainbow with nougat (Android 7)

With Android 7, the Cubot Rainbow 2 gets the acrobatic Google operating system. The system was hardly adapted. This should make it difficult for anyone to find their bearings. All content in German is also available. In the settings you find the point “parallel space”. This is a pretty awesome tool that allows you to clone apps. This gives the user some advantages. Thus, e.g. It is possible to install Whatsapp twice and to use the Messenger with both handynams, provided that two Sim cards are used. Parallelspace also creates two instances of online games such as Clash of Clans or Clash Royale. This makes it possible to use two accounts from one device.

Another small feature in the system I discovered by chance: If you wipe in the homescreen up, then rapid accesses appear on particularly often used apps and setting options such as WLAN, Bluetooth and display brightness. This feature seems to be remotely similar to IOS’s Quick Settings Bar.

Furthermore, the multi-user function is enabled. Thus, a guest user with limited permissions can create, if the device times out of the hand.

The system runs solidly and without crashing. Cubot has made a good decision with Android 7. With nougat, the operating system should remain current for the next few months. Updates are implemented as OTA updates.


Now to the feature, which is presented in the Cubot Rainbow 2 as a special feature. The dual camera. Cubot has two advantages in using two Kameral lenses (13 MP + 2 MP): on the one hand the possibility of finding distances to specific objects and the double light intensity through two openings. The former is intended to provide all non-focused objects with a blurred veil in the background in order to strengthen the spatial perception in the images and the focus more to the fore to back. So much for the theory. In practice, the Cubot Rainbow 2 (still?) Does not seem to work. The blur effect, as it is called in the application, merely focuses a certain oval area around the focused point, without paying attention to the spatial distance. For this effect, no dual camera would be necessary. Maybe an update will bring a more useful blur effect here in the future.

The manufacturer issues an opening of ƒ/2.0. All images were shot according to metadata with an opening of ƒ/2.4. Unfortunately, I can not say with definite certainty which value is right now.

Apart from that, the camera makes quite good pictures. The display is also sharp on a 15.6 inch laptop screen. However, the image becomes very pixely when the image is zoomed in. The colors are not falsified, but sometimes they look slightly pale. It takes some time from pressing the shutter button to storing the shot, and the autofocus sometimes gets a bit heavy. Especially in low light conditions the camera is sometimes unable to find a focus point. At night the camera is rather useless. When the brightness decreases, the picture quality deteriorates rapidly. At night there must already be a lot of artificial light, so that recordings are not completely useless. There is nothing recognizable by a double light intensity through the two lenses.

If the photos of the back camera are still sharp, the front camera shows the opposite. It only charges with 5 megapixels. But even this value seems rather unrealistic to me in the face of muddy pictures. There is only one way to make detailed self-notes with the Cubot Rainbow 2: turn the smartphone, use the Leister button as a trigger, and hope the face is captured by the focus.
Why the front camera has an LED flash, I am puzzling. It would have been better to have a decent sensor installed instead of spending money on such a gimmick.

Cubot Testfoto Rainbow 2 (19)Cubot Testfoto Rainbow 2 (1)Cubot Testfoto Rainbow 2 (12)Cubot Testfoto Rainbow 2 (13)Cubot Testfoto Rainbow 2 (14)Cubot Testfoto Rainbow 2 (20)

Who in the Cubot Rainbow 2 a high-quality dual camera as expected in the current Huawei smartphones, unfortunately must be disappointed. Nevertheless, the built-in camera of the price class is worthy.


Now we come to the probably biggest drawback of the Cubot Rainbow 2. The missing LTE module. Cubot unfortunately saves 4G frequencies. This means that only the 2G and 3G network is available to the user. This is enough for surfing and telephoning, but for junkies of the mobile Internet the Cubot is not a recommended mobile phone. However, the reception is very reliable. A small consolation over the missing 4G module is the Dual Sim and MicroSD card support (up to 256 GB). With this device, Cubot is fortunately not using the now established hybrid solution, so that memory expansion and dual-sim on this device are possible at the same time.

A sufficient quality is provided for telephone calls. The hands-free function is simply simple. The call partner sounds twice as soon as the loudspeaker of the Cubot is used. It is also a torment to listen to the opposite, since the loudspeaker with increased telephone volume sounds extremely tinny. It is therefore advisable to telephone in the conventional way, ie to keep the device to the ear. In this way the conversation quality is much more pleasant.
The speaker can not convince when listening to music either. The sound simply goes too flat and gets worse the higher the volume is set. The loudspeaker is suitable for watching videos or playing games. The use of headphones is easily possible thanks to the AUX connection. A Bluetooth 4.0 interface is also available for connecting wireless headsets or for data transmission. NFC does not belong to dahingegen to the equipment of the cheap Cubot Smartphone.

In terms of WLAN reception, the Cubot Rainbow 2 can shine. Although it receives only the 2.4 GHz frequency, but in a good quality. Even through walls, the connection to the wireless access point is still stable. In fact, the GPS module does not appear to be particularly reliable. The correct location is usually found, but in the case of navigation, the fixed location moves sometimes with the car stationary, or is simply moved into a parallel road. The low-budget device is, unfortunately, only conditionally suitable as a replacement for a navigation device.

The basic equipment is available in the multifunction device. A brightness sensor allows for automatic adjustment of the display brightness is not missing. In addition, an approximation and acceleration sensor is on board. A fingerprint sensor, a compass and a gyroscope sensor are not available.


With a 2350 mAh battery, of course, no more dove from the roof. The opposite is, however, the already almost minimalistic hardware, which should not eat much energy. This is confirmed by the test. The battery lasted in the test loose one day, although the device was brought to the load limit by different bench market tests. In normal operation, the unit will last approximately 1 – 1.5 days before it has to go back to the leash.

The PC-Mark battery test took 6.5 hours to reduce the charge from 100% to 20%. This is a quite acceptable value. When charging, you do not have to do without Quickcharge. The battery needs 2 hours to reach a status of 75%. The full 100% are only available after 3 hours. Since smartphones are mostly loaded over night, this should not be so important.

Conclusion and alternative

For under 70 € you get with the Cubot Rainbow 2 a quite usable device. The dual camera turned out in the test rather than eyewashing and the missing LTE module must be able to get drunk.



This person is lazy, nothing left!

Leave a Response

This site uses Akismet to reduce spam. Learn how your comment data is processed.