Bluboo D Series

Graphics Adapter: ARM Mali-400 MP2, ARM Mali-T720 MP2
Display: 5.00 inch, 5.20 inch, 5.50 inch
Weight: 0.126kg, 0.15kg, 0.159kg, 0.184kg
Price: 100 euro
Average of 4 scores (from 7 reviews)
Bluboo D1
Specifications

Processor: Mediatek MT6580M
Graphics Adapter: ARM Mali-400 MP2
Display: 5.00 inch, 16:9, 1280 x 720 pixels
Weight: 0.126kg
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Average Score:
Source: Gogi.in

So overall the handset is not that powerful, camera quality is bad (just look at the sample images) and handset does not support 4G. Good point is that the D1 runs Android Nougat out of the box. Battery life is decent.
Single Review, online available, Medium, Date: 06/21/2017
Rating: Total score: 40%
Foreign Reviews
Source: FAQsAndroid

Single Review, online available, Long, Date: 06/05/2017
Rating: Total score: 56% price: 70% display: 40% mobility: 70% workmanship: 55%
Source: Notebook Italia

Positive: Good price; long battery life; large screen; solid workmanship.
Single Review, online available, Very Long, Date: 07/15/2017
Bluboo D2
Specifications

Processor: Mediatek MT6580M
Graphics Adapter: ARM Mali-400 MP2
Display: 5.20 inch, 16:9, 1280 x 720 pixels
Weight: 0.184kg
Links:
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Average Score:
Source: Igeekphone

If You Are interested in this cheapest budget best smartphone of 2018 “I mean” in Bluboo D2 so you can able it to purchase on Gearbest with just a price value of $62.04 using Coupon Code: GBMBP , you can ask more support from Bluboo official site.
Single Review, online available, Long, Date: 02/21/2018
Rating: Total score: 79% price: 87% performance: 72% mobility: 85% workmanship: 83%
Foreign Reviews
Source: Mega Obzor

Positive: Attractive design; nice design; good display; long battery life. Negative: Weak hardware.
Single Review, online available, Long, Date: 01/25/2018
Bluboo D5 Pro
Specifications

Processor: Mediatek MT6737
Graphics Adapter: ARM Mali-T720 MP2
Display: 5.50 inch, 18:9, 1280 x 640 pixels
Weight: 0.15kg
Links:
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Foreign Reviews
Source: Mega Obzor

Positive: Low price; beautiful design; decent hardware; support LTE; nice display.
Single Review, online available, Medium, Date: 05/21/2018
Bluboo D6
Specifications

Processor: Mediatek MT6580M
Graphics Adapter: ARM Mali-400 MP2
Display: 5.50 inch, 18:9, 960 x 480 pixels
Weight: 0.159kg
Price: 100 euro
Links:
Pricecompare
Average Score:
Foreign Reviews
Source: Chinahandys.net

Single Review, online available, Long, Date: 10/23/2018
Rating: Total score: 60% performance: 60% display: 50% mobility: 60% workmanship: 70%
Comment
Bluboo:
In 2009, the Shenzhen Huihua Exploit Technology Co LTD established the brand Bluboo in Hong Kong. The brand is focused on smartphones.
Internationally, the brand is not too important. There are hardly any reviews, and in the few cases, the rating is rather underwhelming (as of 2016).
These graphics cards are not suited for Windows 3D games. Office and Internet surfing however is possible.
ARM Mali-400 MP2: OpenGL ES 2.0 GPU for ARM based SoCs with 2 fragment processors and 1 vertex processor.
ARM Mali-T720 MP2: Integrated graphics card in ARM based SoCs. Can be configured with up to 8 cores (T720 MP8) and 650 MHz core clock (at 28nm). Supports OpenGL ES 3.1, OpenCL 1.1, DirectX 11 FL9_3, and Renderscript.
» Further information can be found in our Comparison of Mobile Graphics Cards and the corresponding Benchmark List.
Mediatek:
MT6580M: Quad-core SoC (4x Cortex-A7 at 1.3 GHz) for tablets and smartphones.
MT6737: ARM based quad-core SOC (4x Cortex-A53) with 64-bit support and a clock of up to 1.3 GHz.
» Further information can be found in our Comparison of Mobile Processsors.
» To find out how fine a display is, see our DPI List.
0.126 kg:
Only few smartphones are more lightweight than this.
0.184 kg:
58.75%: Such a bad rating is rare. There exist hardly any notebooks, which are rated worse.
» Further information can be found in our Notebook Purchase Guide.