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Microsoft Lumia 640 XL LTE Dual SIM vs Xiaomi Mi4i

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Summary
56%
64%
Performance

Snapdragon 400

1 GB RAM

Snapdragon 615

2 GB RAM

Display

5.7" (14.48 cm)

720x1280 px (HD)

5.0" (12.7 cm)

1080x1920 px (FULL HD)

Rear Camera

13 MP

Single Camera

13 MP

Single Camera

Front Camera

5 MP

Single Camera

5 MP

Single Camera

Battery

3000 mAh

24 h talktime (3G)

3120 mAh

Storage

8 GB

128 GB (Expandable)

16 GB

Non Expandable

Expert Rating
User Rating

★★★★★
★★★★★

3.9/5 based on 442 ratings

★★★★★
★★★★★

4.2/5 based on 94,392 ratings

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Microsoft Lumia 640 XL LTE Dual SIM is permanently discontinued.
Not Available in any store
Notify me when it's available
General
Launch Date

April 23, 2015 (Official)

Operating System

Windows Phone v8.1

Android v5.0.2 (Lollipop)

Performance
Poor
Average
Chipset

Qualcomm Snapdragon 400 MSM8226

Qualcomm Snapdragon 615 MSM8939

CPU

Quad core, 1.2 GHz, Cortex A7

Octa core (1.7 GHz, Quad core, Cortex A53 + 1.1 GHz, Quad core, Cortex A53)

Architecture

32 bit

Graphics

Adreno 305

Adreno 405

RAM

1 GB

2 GB

Display
Average
Good
Display Type

IPS LCD

Screen Size

5.7 " (14.48 cm)

Resolution

720x1280 px (HD)

Pixel Density

258 ppi

Screen to Body Ratio (calculated)

69.55 %

71.54 %

Screen Protection

Corning Gorilla Glass v3

Touch Screen

, Capacitive Touchscreen, Multi-touch

Design
Size Compare
Size Compare
Dimensions

Height: 157.9 mm
Width: 81.5 mm
Thickness: 9 mm

Height: 138.1 mm
Width: 69.6 mm
Thickness: 7.8 mm

Weight

171 grams

130 grams

Colours

Black, Blue, Orange, White

Black, Blue, Pink, White, Yellow

Camera
Main Camera
Camera Setup

Single

Single

Resolution

13 MP f/2.0, Primary Camera(28 mm focal length)

13 MP f/2.0, Primary Camera

Sensor

Back-illuminated sensor (BSI)

CMOS image sensor

Autofocus

OIS

No

Flash

, LED Flash

, Dual-color LED Flash

Image Resolution

4128 x 3096 Pixels

4128 x 3096 Pixels

Settings

Exposure compensation, ISO control

Exposure compensation, ISO control

Shooting Modes

Continuous Shooting
High Dynamic Range mode (HDR)

Continuous Shooting
High Dynamic Range mode (HDR)

Camera Features

4 x Digital Zoom
Auto Flash
Digital image stabilization
Face detection
Touch to focus

Digital Zoom
Auto Flash
Digital image stabilization
Face detection
Smile detection
Touch to focus

Video Recording

1920x1080 @ 30 fps

1920x1080 @ 30 fps

Front Camera
Average
Average
Camera Setup

Single

Single

Resolution

5 MP, Primary Camera

5 MP, Primary Camera

Autofocus

No

Flash

No

Camera Features

Wide Angle Selfie

Video Recording

1920x1080 @ 30 fps

Battery
Good
Average
Capacity

3000 mAh

3120 mAh

Type

Li-ion

Li-ion

Removable

No

TalkTime

Up to 24 Hours(3G) / Up to 30.3 Hours(2G)

Standby time

Up to 888 Hours(3G) / Up to 888 Hours(2G)

Quick Charging

, Quick

USB Type-C

No

Storage
Very Good
Excellent
Internal Memory

8 GB

16 GB

Expandable Memory

, Up to 128 GB

No

USB OTG

Network & Connectivity
SIM Slot(s)

Dual SIM, GSM+GSM

Dual SIM, GSM+GSM

SIM Size

SIM1: Micro
SIM2: Micro

SIM1: Micro
SIM2: Micro

Network Support

5G Not Supported in India, 4G Supported in India, 3G, 2G

5G Not Supported in India, 4G Supported in India, 3G, 2G

SIM 1

4G Bands:
TD-LTE 2600(band 38) / 2300(band 40)
FD-LTE 2100(band 1) / 1800(band 3) / 2600(band 7) / 900(band 8) / 700(band 28) / 1900(band 2) / 1700(band 4) / 850(band 5) / 700(band 17) / 800(band 20)
3G Bands:
UMTS 1700 / 1900 / 2100 / 850 / 900 MHz
2G Bands:
GSM 1800 / 1900 / 850 / 900 MHz
4G Speed:
50 Mbit/s ↑ 150 Mbit/s ↓ (LTE category 4)
3G Speed:
HSDPA 42.2 Mbit/s ↓, HSUPA 5.76 Mbit/s ↑
GPRS:
Available
EDGE:
Available
Read More..

4G Bands:
TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) / 1900(band 39)
FD-LTE 1800(band 3) / 2600(band 7)
3G Bands:
UMTS 1900 / 2100 / 850 / 900 MHz
2G Bands:
GSM 1800 / 1900 / 850 / 900 MHz
4G Speed:
50 Mbit/s ↑ 150 Mbit/s ↓ (LTE category 4)
GPRS:
Available
EDGE:
Available
Read More..

SIM 2

2G Bands:
GSM 1800 / 1900 / 850 / 900 MHz

4G Bands:
TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) / 1900(band 39)
FD-LTE 1800(band 3) / 2600(band 7)
3G Bands:
UMTS 1900 / 2100 / 850 / 900 MHz
2G Bands:
GSM 1800 / 1900 / 850 / 900 MHz
GPRS:
Available
EDGE:
Available
Read More..

SAR Value

Head: 1.29 W/kg, Body: 0.79 W/kg

Wi-Fi

, Wi-Fi 4 (802.11 b/g/n)

, Wi-Fi 5 (802.11 a/b/g/n/ac) 5GHz

Wi-Fi Features

Mobile Hotspot

Wi-Fi Direct, Mobile Hotspot

Bluetooth

, v4.0

, v4.1

GPS

with A-GPS, Glonass

with A-GPS, Glonass

NFC

No

USB Connectivity

microUSB 2.0

microUSB 2.0

HDMI

No

Multimedia
FM Radio

Loudspeaker

Audio Jack

3.5 mm

3.5 mm

Sensors
Fingerprint Sensor

No

Other Sensors

Light sensor, Proximity sensor, Accelerometer, Compass

Light sensor, Proximity sensor, Accelerometer, Compass, Gyroscope