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Microsoft Lumia 640 XL Dual SIM vs Karbonn Alfa A90

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Summary
56%
Performance

Snapdragon 400

1 GB RAM

512 MB RAM

Display

5.7" (14.48 cm)

720x1280 px (HD)

4.0" (10.16 cm)

480x800 px

Rear Camera

13 MP

Single Camera

2 MP

Single Camera

Front Camera

5 MP

Single Camera

1.3 MP

Single Camera

Battery

3000 mAh

24 h talktime (3G)

1400 mAh

Storage

8 GB

128 GB (Expandable)

4 GB

32 GB (Expandable)

Expert Rating

3.5/5

Read Expert Review

User Rating

★★★★★
★★★★★

4.1/5 based on 5,398 ratings

★★★★★
★★★★★

3.6/5 based on 121 ratings

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Microsoft Lumia 640 XL Dual SIM is permanently discontinued.
Not Available in any store
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General
Launch Date

September 3, 2015 (Official)

Operating System

Windows Phone v8.1

Android v4.4 (Kitkat)

Performance
Poor
Chipset

Qualcomm Snapdragon 400 MSM8226

CPU

Quad core, 1.2 GHz, Cortex A7

Single core, 1 GHz

Graphics

Adreno 305

RAM

1 GB

512 MB

Display
Average
Display Type

IPS LCD

Screen Size

5.7 " (14.48 cm)

Resolution

720x1280 px (HD)

Pixel Density

258 ppi

Screen to Body Ratio (calculated)

69.44 %

Screen Protection

Corning Gorilla Glass v3

Touch Screen

, Capacitive Touchscreen, Multi-touch

Design
Size Compare
Dimensions

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

Weight

171 grams

Colours

Black, Blue, Orange, White

Black, White

Camera
Main Camera
Camera Setup

Single

Single

Resolution

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

2 MP, Primary Camera

Sensor

Back-illuminated sensor (BSI)

Autofocus

OIS

No

Flash

, LED Flash

, Dual LED Flash

Image Resolution

4128 x 3096 Pixels

1600 x 1200 Pixels

Settings

Exposure compensation, ISO control

Shooting Modes

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

Video Recording

1920x1080 @ 30 fps

Front Camera
Average
Camera Setup

Single

Single

Resolution

5 MP, Primary Camera

1.3 MP, Primary Camera

Autofocus

No

Flash

No

Video Recording

1920x1080 @ 30 fps

Battery
Good
Capacity

3000 mAh

1400 mAh

Type

Li-ion

Li-ion

Removable

TalkTime

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

USB Type-C

No

Storage
Very Good
Internal Memory

8 GB

4 GB

Expandable Memory

, Up to 128 GB

, Up to 32 GB

Network & Connectivity
SIM Slot(s)

Dual SIM, GSM+GSM

Dual SIM, GSM+GSM

SIM Size

SIM1: Micro

Network Support

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

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

SIM 1

3G Bands:
UMTS 2100 / 850 / 900 MHz
2G Bands:
GSM 1800 / 1900 / 850 / 900 MHz
3G Speed:
HSDPA 42.2 Mbit/s ↓, HSUPA 5.76 Mbit/s ↑
GPRS:
Available
EDGE:
Available

3G Bands:
UMTS 2100 MHz
2G Bands:
GSM 1800 / 900 MHz
GPRS:
Available
EDGE:
Available

SIM 2

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

2G Bands:
GSM 1800 / 900 MHz

Wi-Fi

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

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

Wi-Fi Features

Mobile Hotspot

Bluetooth

, v4.0

, v4.0

GPS

with A-GPS, Glonass

with A-GPS

NFC

No

USB Connectivity

microUSB 2.0

microUSB 2.0

Multimedia
FM Radio

Loudspeaker

Audio Jack

3.5 mm

3.5 mm

Sensors
Fingerprint Sensor

No

Other Sensors

Light sensor, Proximity sensor, Accelerometer, Compass

Accelerometer