Comparison between:
- Nokia Lumia 635
- Google Pixel 4a

Brand and model

Information about the brand, model and model alias (if any) of a specific device.

Nokia Lumia 635Google Pixel 4a
Nokia Lumia 635
Prices
Google Pixel 4a
Prices
Model aliasRM-974
RM-975
-

Design

Information about the dimensions and weight of the device, shown in different measurement units. Body materials, available colors, certifications.

Width66.7 mm
6.67 cm
0.219 ft
2.626 in
69.4 mm
6.94 cm
0.228 ft
2.732 in
Height129.5 mm
12.95 cm
0.425 ft
5.098 in
144 mm
14.4 cm
0.472 ft
5.669 in
Thickness9.2 mm
0.92 cm
0.03 ft
0.362 in
8.2 mm
0.82 cm
0.027 ft
0.323 in
Weight134 g
0.3 lbs
4.73 oz
143 g
0.32 lbs
5.04 oz
Volume79.47 cm³
4.83 in³
81.95 cm³
4.98 in³
ColorsBlack
White
Orange
Yellow
Green
Just Black
Body materials-Glass
Polycarbonate

SIM card

The Subscriber Identity Module (SIM) is used in mobile devices for storing data authenticating the subscribers of mobile services.

SIM card typeMicro-SIMNano-SIM
Number of SIM cards11

Networks

A mobile (cellular) network is a radio system, which allows a large number of mobile devices to communicate with each other.

GSMGSM 850 MHz
GSM 900 MHz
GSM 1800 MHz
GSM 1900 MHz
GSM 850 MHz (B5)
GSM 900 MHz (B8)
GSM 1800 MHz (B3)
GSM 1900 MHz (B2)
CDMA-CDMA 800 MHz (BC0)
CDMA 1900 MHz (BC1)
CDMA 800 MHz (BC10)
UMTSUMTS 850 MHz
UMTS 900 MHz
UMTS 2100 MHz
UMTS 850 MHz (B5)
UMTS 900 MHz (B8)
UMTS 1700 MHz (B4)
UMTS 1900 MHz (B2)
UMTS 2100 MHz (B1)
LTELTE 800 MHz
LTE 1800 MHz
LTE 2600 MHz
LTE-FDD 700 MHz (B12)
LTE-FDD 700 MHz (B13)
LTE-FDD 700 MHz (B14)
LTE-FDD 700 MHz (B17)
LTE-FDD 700 MHz (B28)
LTE-FDD 700 MHz (B29)
LTE-FDD 800 MHz (B20)
LTE-FDD 850 MHz (B5)
LTE-FDD 850 MHz (B18)
LTE-FDD 850 MHz (B19)
LTE-FDD 850 MHz (B26)
LTE-FDD 900 MHz (B8)
LTE-FDD 1700 MHz (B4)
LTE-FDD 1700 MHz (B66)
LTE-FDD 1800 MHz (B3)
LTE-FDD 1900 MHz (B2)
LTE-FDD 1900 MHz (B25)
LTE-FDD 2100 MHz (B1)
LTE-FDD 2600 MHz (B7)
LTE-TDD 1900 MHz (B39)
LTE-TDD 2300 MHz (B40)
LTE-TDD 2500 MHz (B41)
LTE-TDD 2600 MHz (B38)
LTE-FDD 2300 MHz (B30)
LTE-TDD 5200 MHz (B46)
LTE-TDD 3500 MHz (B46)
LTE-FDD 600 MHz (B71)

Mobile network technologies and bandwidth

Communication between devices within mobile networks is realized via various generations of network technologies, which provide different bandwidth.

Mobile network technologiesUMTS
EDGE Class B
GPRS Class B
HSPA+
LTE Cat 3
UMTS
EDGE
GPRS
HSPA+
LTE
EV-DO Rev. A
-2x2 MiMO

Operating system

Operating system is the system software, which manages and controls the functioning of the hardware components of the device.

Operating system (OS)Microsoft Windows 8.1
Microsoft Windows 10 Mobile
Android 10

System on Chip (SoC)

A system on a chip (SoC) includes into a single chip some of the main hardware components of the mobile device.

SoCQualcomm Snapdragon 400 MSM8926Qualcomm Snapdragon 730G
Process technology28 nm8 nm
CPUARM Cortex-A72x 2.2 GHz Kryo 470, 6x 1.8 GHz Kryo 470
CPU bits32 bit64 bit
Instruction setARMv7ARMv8
Level 1 cache memory (L1)16 KB + 16 KB-
Level 2 cache memory (L2)1024 KB
1 MB
-
CPU cores48
CPU frequency1200 MHz2200 MHz
GPUQualcomm Adreno 305Qualcomm Adreno 618
GPU cores1-
RAM capacity512 MB6 GB
RAM type-LPDDR4X
RAM channels-Double channel
RAM frequency-2133 MHz
-Titan M Security Module

Storage

Every mobile device has a built-in storage (internal memory) with a fixed capacity.

Storage8 GB128 GB

Memory cards

Memory cards are used in mobile devices for expanding their external storage capacity.

TypesmicroSD
microSDHC
microSDXC
-

Display

The display of a mobile device is characterized by its technology, resolution, pixel density, diagonal length, color depth, etc.

Type/technologyIPSOLED
Diagonal size4.5 in
114.3 mm
11.43 cm
5.81 in
147.57 mm
14.76 cm
Width2.2 in
56 mm
5.6 cm
2.49 in
63.17 mm
6.32 cm
Height3.92 in
99.64 mm
9.96 cm
5.25 in
133.37 mm
13.34 cm
Aspect ratio1.779:12.111:1
Resolution480 x 854 pixels1080 x 2280 pixels
Pixel density218 ppi
85 ppcm
434 ppi
170 ppcm
Color depth24 bit
16777216 colors
24 bit
16777216 colors
Display area64.81 %84.58 %
Other featuresCapacitive
Multi-touch
Scratch resistant
Capacitive
Multi-touch
Scratch resistant
Corning Gorilla Glass 3
ClearBlack display
Ambient EQ
Corning Gorilla Glass
Always-on Display
HDR (UHDA certification)

Sensors

Different sensors measure different physical quantities and convert them into signals recognizable by the mobile device.

SensorsAccelerometerProximity
Light
Accelerometer
Gyroscope
Barometer
Magnetometer
-Active Edge
Motion Sense (Soli radar)

Rear camera

The primary camera of the mobile device is usually placed on its back and can be combined with one or more additional cameras.

Sensor size3.6 x 2.7 mm
0.18 in
-
Sensor format-1/2.55"
Pixel size1.389 µm
0.001389 mm
1.4 µm
0.001400 mm
Crop factor9.61-
ISO100 - 1600-
Aperturef/2.4f/1.7
Focal length and 35 mm equivalent2.92 mm
28.08 mm *(35 mm / full frame)
28 mm *(35 mm / full frame)
Field of view-77 °
Flash type-Dual LED
Image resolution2592 x 1944 pixels
5.04 MP
4032 x 3024 pixels
12.19 MP
Video resolution1280 x 720 pixels
0.92 MP
3840 x 2160 pixels
8.29 MP
Video FPS30 fps60 fps
FeaturesAutofocus
Digital zoom
Geotagging
Panorama
Touch focus
Face detection
White balance settings
Exposure compensation
Macro mode
Autofocus
Continuous shooting
Digital zoom
Optical zoom
Digital image stabilization
Optical image stabilization
Geotagging
Panorama
HDR
Touch focus
Face detection
White balance settings
ISO settings
Exposure compensation
Self-timer
Scene mode
Phase detection autofocus (PDAF)
-Phase detection with Dual Pixel
1080p @ 120 fps
720p @ 240 fps

Front camera

Modern smartphones have one or more front cameras and their positioning has led to various design concepts – pop-up camera, rotating camera, notch, punch hole, under-display camera, etc.

Pixel size-1.22 µm
0.001220 mm
Aperture-f/2
Focal length and 35 mm equivalent-22 mm *(35 mm / full frame)
Field of view-84 °
Image resolution-3264 x 2448 pixels
7.99 MP
Video resolution-1920 x 1080 pixels
2.07 MP
Video FPS-30 fps
Features-HDR
Face detection
Face unlock
-2 NIR cameras
NIR flood emitter
NIR dot projector

Audio

Information about the type of speakers and the audio technologies supported by the device.

SpeakerLoudspeaker
Earpiece
Loudspeaker
Earpiece
Stereo speakers
-Active noise cancellation
HAC (M3/T3) - Hearing Aid Compatibility

Radio

The radio in a mobile device is a built-in FM radio receiver.

RadioYesNo

Tracking/Positioning

Information about the positioning and navigation technologies supported by the device.

Tracking/PositioningGPS
A-GPS
S-GPS
GLONASS
Wi-Fi
Cell ID
BeiDou
GPS
A-GPS
GLONASS
Galileo

Wi-Fi

Wi-Fi is a technology that provides wireless data connections between various devices within a short range.

Wi-Fi802.11b
802.11g
802.11n
Wi-Fi Hotspot
802.11a
802.11b
802.11g
802.11n
802.11n 5GHz
802.11ac
Dual band
Wi-Fi Hotspot
Wi-Fi Direct
Wi-Fi Display
-2x2 MiMO

Bluetooth

Bluetooth is a standard for secure wireless data transfer between different types of devices over short distances.

Version4.05.0
FeaturesA2DP
AVRCP
GATT
HFP
OPP
PBAP
A2DP
LE

USB

The Universal Serial Bus (USB) is an industry standard that allows different electronic devices to exchange data.

Connector typeMicro USBUSB Type-C
Version2.02.0
FeaturesCharging
Mass storage
Charging
Mass storage
On-The-Go

Headphone jack

The headphone jack is an audio phone connector, a.k.a. an audio jack. The most widely used one in mobile devices is the 3.5 mm headphone jack.

Headphone jackYesYes

Connectivity

Information about other important connectivity technologies supported by the devices.

ConnectivityComputer sync
OTA sync
Tethering
DLNA
Computer sync
OTA sync
Tethering
NFC
VoLTE

Browser

A web browser is a software application for accessing, fetching, displaying and navigating through information on the World Wide Web.

BrowserHTML
HTML5
CSS 3
XML
xHTML
HTML
HTML5
CSS 3

Audio file formats/codecs

Mobile devices support various audio file formats and codecs, which respectively store and code/decode digital audio data.

Audio file formats/codecs3GPP
AAC
AMR
AMR-WB
M4A
MP3
WMA
WAV
ASF
AAC
AAC+
AMR
AMR-WB
aptX
aptX HD
eAAC+
FLAC
M4A
MIDI
MP3
OGG
WMA
WAV
LDAC

Video file formats/codecs

Mobile devices support various video file formats and codecs, which respectively store and code/decode digital video data.

Video file formats/codecs3GPP
3GPP2
AVI
H.263
H.264
QuickTime
MP4
MPEG-4
VC-1
WMV
WMV9
3GPP
AVI
DivX
Flash Video
H.263
H.264
H.265
MKV
QuickTime
MP4
VC-1
VP8
WebM
WMV
Xvid

Battery

The batteries of mobile devices differ in capacity and technology. They provide the electrical charge needed for the functioning of the devices.

Capacity1830 mAh3140 mAh
TypeLi-IonLi-Polymer
2G talk time12 h
720 min
0.5 days
-
2G stand-by time648 h
38880 min
27 days
-
3G talk time14 h
840 min
0.6 days
-
3G stand-by time648 h
38880 min
27 days
-
Charger output power-9 V / 2 A
Quick charge technology-USB Power Delivery 2.0
FeaturesRemovableFast charging
Non-removable
Battery model: BL-5H-

Specific Absorption Rate (SAR)

The SAR rating shows the amount of electromagnetic radiation absorbed by the human body when using a mobile device, expressed in W/kg.

Head SAR (EU)-1.37 W/kg
Body SAR (EU)-1.39 W/kg
Head SAR (USA)-1.18 W/kg
Body SAR (USA)-1.19 W/kg
 Nokia Lumia 635Google Pixel 4a