Nokia Lumia 635 vs Microsoft Lumia 640

Compare phone and tablet specifications of up to three devices at once.

Display

Size:

4.5 inches
5.0 inches

Resolution:

854 x 480 pixels, 218 PPI
1280 x 720 pixels, 294 PPI

Technology:

IPS LCD
IPS LCD

Screen-to-body:

64.48 %
67.65 %

Colors:

16 777 216
16 777 216

Touchscreen:

Capacitive, Multi-touch
Capacitive, Multi-touch

Features:

Scratch-resistant glass (Corning Gorilla Glass 3)
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor

Hardware

System chip:

Qualcomm Snapdragon 400
Qualcomm Snapdragon 400

Processor:

Quad-core, 1200 MHz, ARM Cortex-A7
Quad-core, 1200 MHz

GPU:

Adreno 305
Yes

RAM:

1GB
1GB

Internal storage:

8GB
8GB

Storage expansion:

microSDXC up to 128 GB
microSDXC up to 128 GB

Device type:

Smartphone
Smartphone

OS:

Windows Phone, 8.1
Windows (10 Mobile)

Battery

Capacity:

1830 mAh
2500 mAh

Type:

Li - Ion, User replaceable
User replaceable

Camera

Rear:

Single camera
Single camera

Main camera:

5 MP (Autofocus)
8 MP (Autofocus, BSI sensor)

Specifications:

Aperture size: F2.4; Focal length: 28 mm; Sensor size: 1/4"
Aperture size: F2.2; Focal length: 28 mm; Sensor size: 1/4"

Video recording:

1280x720 (HD) (30 fps)
1920x1080 (Full HD) (30 fps)

Features:

Continuous autofocus, Video light, Video calling, Video sharing

Front:

0.9 MP

Video capture:

1280x720 (HD)

Design

Dimensions:

5.10 x 2.63 x 0.36 inches (129.5 x 66.7 x 9.2 mm)
5.56 x 2.84 x 0.35 inches (141.3 x 72.2 x 8.8 mm)

Weight:

4.73 oz (134.0 g)
5.11 oz (145.0 g)

Features:

Interchangeable covers
Touch sensitive control keys, Notification light

Keys:

Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key

Colors:

Black, Orange, Yellow, Green, White
Black, Orange, Blue, White

Cellular

LTE (FDD):

Bands 3(1800), 7(2600), 20(800 DD)
Bands 2(1900), 4(AWS-1), 5(850), 7(2600), 12(700 a), 17(700 b), 28(700 APT)

UMTS:

Bands 5(850), 8(900), 1(2100)
Bands 5(850), 8(900), 4(1700/2100), 1(2100)

Data Speed:

LTE Cat 3 (100/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS
LTE Cat 4 (150/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS

SIM type:

Micro SIM
Micro SIM

Multimedia

Headphones:

3.5mm jack
3.5mm jack

Speakers:

Earpiece, Loudspeaker

Features:

Album art cover
Album art cover, Background playback, Music recognition, Preset equalizer

Screen mirroring:

DLNA
DLNA

Radio:

FM
FM

Connectivity & Features

Bluetooth:

4.0
4.0

Wi-Fi:

802.11 b, g, n; Hotspot
802.11 b, g, n; Hotspot

USB:

microUSB, USB 2.0
microUSB, USB 2.0

Features:

Mass storage device, Charging
Mass storage device, Charging

Location:

A-GPS, Glonass, Wi-Fi positioning
GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning

Sensors:

Accelerometer
Accelerometer, Compass

Other:

OTA sync
NFC, Tethering, Computer sync, OTA sync

Hearing aid compatible:

M3, T4

Phone features

Notifications:

Music ringtones (MP3, WAV), Polyphonic ringtones, Vibration, Phone profiles, Flight mode, Silent mode, Speakerphone
Haptic feedback, Music ringtones (MP3), Vibration, Flight mode, Silent mode, Speakerphone

Other features:

Voice commands, Voice recording, TTY/TDD
Voice dialing, Voice commands, Voice recording, TTY/TDD

Regulatory Approval

FCC approval:

Date approved:

May 13, 2014

FCC ID value:

PDNRM-974

Measured SAR:

Head:

0.72 W/kg

Body:

0.76 W/kg

Simultaneous Transmission:

1.56 W/kg

Wireless Router:

1.23 W/kg

Buyers information

Price:

€ 159

In The Box:

High Efficiency Charger AC-20, Quick guide

Availability

Officially announced:

Mar 02, 2015
FCC OKs Cingular\'s purchase of AT&T Wireless