33points

Microsoft Lumia 640 Dual SIM

55points

Xiaomi Redmi Note 4X

Microsoft Lumia 640 Dual SIM
Comparison winner
Xiaomi Redmi Note 4X
vs
vs

90 facts in comparison

Microsoft Lumia 640 Dual SIM vs Xiaomi Redmi Note 4X

Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X
33
points
55
points

Why is Microsoft Lumia 640 Dual SIM better than Xiaomi Redmi Note 4X?

  • Has branded damage resistant glass
  • 30g lighter
    145gvs175g
  • Has a removable battery
  • Has NFC
  • Is DLNA certified
  • 3.8mm narrower
    72.2mmvs76mm
  • 9.7mm shorter
    141.3mmvs151mm
  • 6.87% less body volume
    89.78cm³vs96.39840000000001cm³

Why is Xiaomi Redmi Note 4X better than Microsoft Lumia 640 Dual SIM?

  • 1.64x more battery power
    4100mAhvs2500mAh
  • 3.58x faster CPU speed
    2 x 2.1GHz & 4 x 1.85GHz & 4 x 1.4GHzvs4 x 1.2GHz
  • 36.39% higher pixel density
    401ppivs294ppi
  • 10% bigger screen size
    5.5"vs5"
  • 3GB more RAM memory
    4GBvs1GB
  • 1.63x more megapixels (main camera)
    13MPvs8MP
  • 2.25x higher resolution
    1080 x 1920pxvs720 x 1280px
  • 5x more megapixels (front camera)
    5MPvs1MP

Top specs and features

Design

1.thickness

8.8mm

8.4mm

Best

Asus Zenfone AR 64GB

4.6mm

2.weight

145g

175g

Best

Palm Phone

62.5g

3.width

72.2mm

76mm

Best

Vertu Signature for Bentley

42mm

4.height

141.3mm

151mm

Best

Motorola FlipOut

67mm

5.volume

89.78cm³

96.4cm³

Best

Palm Phone

36.17cm³

Display

1.resolution

720 x 1280px

1080 x 1920px

Best

Sony Xperia H8541

2160 x 4320px

2.pixel density

294ppi

401ppi

Best

Sony Xperia H8541

847ppi

3.has branded damage resistant glass
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

Damage resistant glass (such as Corning Gorilla Glass or Asahi Dragontrail Glass) is thin, lightweight, and can withstand high levels of force.

4.screen size

5"

5.5"

The bigger the screen size is, the better the user experience.

Best

Huawei Mate 20 X

7.2"

5.every pixel has three subpixels
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

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.

6.has an IPS screen
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

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.

Performance

1.Has integrated LTE
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

The system on a chip (SoC) has an integrated LTE cellular chip. LTE is capable of downloading at faster speeds than older, 3G technology.

2.GPU clock speed

450MHz

780MHz (MediaTek Helio X20)

The graphics processing unit (GPU) has a higher clock speed.

Best

Infinix Zero 5 Pro

1000MHz

3.Has integrated graphics
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

With integrated graphics you don’t need to buy a separate graphics card.

4.Has out-of-order execution
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

Out-of-order execution is used in CPUs to make use of instruction cycles that would normally be wasted due to delays.

5.Has AES
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

AES is used to speed up encryption and decryption.

6.Has dynamic frequency scaling
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

Dynamic frequency scaling is a technology that allows the processor to conserve power and reduce noise when it is under a light load.

Cameras

1.megapixels

8MP

13MP

Best

Huawei Mate 20 X

40 & 20 & 8MP

2.video recording (main camera)

1080 x 30fps

1080 x 30fps

The maximum resolution available for videos shot with the main camera. Although it may be possible to choose among other frame rates, those recordings usually have lower resolutions.

Best

Crosscall Trekker-X4

1080 x 120fps

3.front camera megapixels

1MP

5MP

Best

Wiko View2 Pro

16 & 16MP

4.Has phase detection autofocus for photos
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

A phase detection autofocus is much faster than a contrast detection autofocus, allowing for sharper images.

5.has a front camera
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

A front camera, also called secondary camera, can be used for video chats/selfies.

6.has a flash
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

A flash is good for low-light environments, and can sometimes be used as flashlight.

Audio

1.has a socket for a 3.5 mm audio jack
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

With a standard mini jack socket, you can use the device with most headphones.

2.number of microphones

2

2

More microphones result in better sound quality and enable the device to filter out background noise.

Best

Motorola Moto Z3

4

3.has a radio
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

It works as an FM radio with included headsets

Battery

1.battery power

2500mAh

4100mAh

Best

Energizer Power Max P16K Pro

16000mAh

2.has a removable battery
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

The battery is removable and can be replaced by the user if broken.

3.has a battery level indicator
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

An indicator shows you when the device has low battery.

4.has a rechargeable battery
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

The battery can be recharged and used over again.

Features

1.Is a multi-user system
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X
2.Has offline voice recognition
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

Offline voice recognition enables you to perform voice actions, like dictating texts or using various voice commands, without an internet connection.

3.Supports Java
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X
4.Allows app installs on the device's external storage
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X
5.Is free and open source
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

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.

6.Has sharing intents
Microsoft Lumia 640 Dual SIM
Xiaomi Redmi Note 4X

If an app has sharing capabilities and the developers have indicated it, the app will automatically appear in your list of sharing options. Some OS’s limit direct sharing options to a select few apps, which means you have to open apps separately in order to upload the files you want to share.

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