BLU D440Microsoft Lumia 638
Top 100%0 points
Top 100%
Top 70%1,482 points
Top 70%
BLU D440
Microsoft Lumia 638
vs
Top specs and features

BLU D440 vs Microsoft Lumia 638: 64 facts in comparison

1. battery power

1.67% more battery power.
1800mAh
Gionee M2017: 7000mAh
1830mAh

2. total clock speed

25% faster CPU clock speed.
4 x 1.5GHz
Meizu Pro 7 Plus 64GB: 10 x 2.6GHz
4 x 1.2GHz

3. pixel density

12.39% higher pixel density.
245ppi
Sony Xperia Z5 Premium Dual: 806ppi
218ppi

4. screen size

The bigger the screen size is, the better the user experience.
4.5"
Samsung Galaxy J Max: 7"
4.5"

5. megapixels

0% more megapixels.
5MP
Nokia 808 Pureview: 41MP
5MP

6. RAM

0MB more RAM memory.
1GB
Razer Phone: 8GB
1GB

7. resolution

26.46% higher resolution.
540 x 960px
Sony Xperia XZ Premium: 2160 x 3840px
480 x 854px

8. has an external memory slot

The device has a standard memory slot (such as an SD or micro SD card slot) so that you can either extend the internal storage with affordable memory modules or you can retrieve data, such as photographs, easily from a memory card.
BLU D440
Microsoft Lumia 638
83% have it

9. weight

9g lighter.
145g
Starmobile Uno B208: 68g
136g

10. has branded damage resistant glass

Damage resistant glass (such as Corning Gorilla Glass or Asahi Dragontrail Glass) is thin, lightweight, and can withstand high levels of force.
BLU D440
Microsoft Lumia 638
39% have it

11. every pixel has three subpixels

The device has a display with three full subpixels per pixel, resulting in a sharp and crisp picture. Pixels in some displays (like AMOLED) share one subpixel to preserve space. This can result in a less crisp, slightly blurred image.
BLU D440
Microsoft Lumia 638
78% have it

12. thickness

1.6mm thinner.
10.8mm
Asus Zenfone AR 64GB: 4.6mm
9.2mm

13. internal storage

4GB more internal storage.
4GB
Huawei Mate 10 Porsche Design: 256GB
8GB

14. has a radio

It works as an FM radio with included headsets
BLU D440
Microsoft Lumia 638
66% have it

16. download speed

7.14x faster downloads.
21MBits/s
Panasonic Eluga Ray 700: 1500MBits/s
150MBits/s

17. has an IPS screen

IPS (In-Plane Switching) is a technology used for LCDs. It was designed to overcome the main limitations of normal TFTs TN-matrices: relatively slow response times, small viewing angles and low quality color reproduction.
BLU D440
Microsoft Lumia 638
51% have it

18. width

0.3mm narrower.
67mm
Vertu Signature for Bentley: 42mm
66.7mm

19. height

3.5mm shorter.
133mm
Motorola FlipOut: 67mm
129.5mm

20. The browser has word wrap

The web browser has automatic word wrap when zooming, the user can easily read long lines without scrolling horizontally.
BLU D440(Android 4.0–4.0.2 Ice Cream Sandwich (API level 14))
Microsoft Lumia 638(Windows 8.1)
82% have it

21. Bluetooth version

0 newer Bluetooth version.
4
Samsung Galaxy S8 Active: 5.1
4

22. Is a multi-user system

BLU D440
Microsoft Lumia 638(Windows 8.1)
71% have it

23. Has integrated LTE

The system on a chip (SoC) has an integrated LTE cellular chip. LTE is capable of downloading at faster speeds than older, 3G technology.
BLU D440
Microsoft Lumia 638(Qualcomm Snapdragon 400)
42% have it

24. semiconductor size

A smaller size indicates that the process to create the chip is newer.
40nm
Asus Zenfone 4 Pro (ZS551KL) 64GB: 10nm
28nm(Qualcomm Snapdragon 400)

25. Is free and open source

Anyone is free to use, copy, study, and change the software in any way, and the source code is openly shared so that people are encouraged to voluntarily improve the design of the software.
BLU D440(Android 4.0–4.0.2 Ice Cream Sandwich (API level 14))
Microsoft Lumia 638
86% have it

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