Manufacturer and Model

Manufacturer
Nokia
Microsoft
Phone model
Lumia 925
Lumia 550
Year of release
2013
2015

Appearance

Case type
Monoblock
Monoblock
Body length
129 mm
136 mm
Body width
71 mm
68 mm
Body thickness
8.5 mm
9.9 mm
Weight
139 g
142 g
Volume
77.41 cm³
91.35 cm³
Body materials and finishes
  • Aluminium alloy
  • Plastic
  • Plastic
Colors

Processor (CPU)

Processor model
  • Qualcomm MSM8960 Snapdragon
  • Qualcomm Snapdragon 210 MSM8909
CPU clock speed
1500 MHz
1100 MHz
Number of processor cores
2
4
Level 1 cache (L1)
16 + 16 kB
Level 2 cache (L2)
1024 kB
1024 kB
Processor size
32 bits
32 bits
Instruction set architecture
ARMv7
ARMv7
Manufacturing process
28 nm
28 nm

Graphics Processor (GPU)

GPU
GPU model
  • Adreno 225
  • Adreno 304
GPU clock speed
400 MHz

Primary storage (RAM)

The amount of RAM
1 GB
1 GB
RAM type
LPDDR2
RAM frequency
500 MHz
533 MHz
Number of RAM channels
2
1

Internal storage

Built-in memory
  • 16 GB
  • 8 GB

SD card

Types of Supported Memory Cards
  • microSDXC
  • microSDHC
  • microSD
Maximum expandable memory
200 GB

Mainboard

Chipset
  • Qualcomm Snapdragon S4 Plus MSM8960
  • Qualcomm Snapdragon 210 MSM8909

Operating system

Operating system
Windows Phone 8

Battery

Battery capacity
2000
2100
Battery type
Li-Ion
Li-Ion
Removable battery
Wireless battery charging
Charging the battery from USB
Call duration in GSM networks
18 h 18 min
16 h
Standby time in GSM networks
432 h
672 h
Call duration in UMTS (WCDMA) networks
12 h
14 h
Standby time on UMTS (WCDMA) networks
440 h
672 h
Duration of listening to music
55 h
Duration of using Wi-Fi
7.2 h

Screen

Screen diagonal
4.5 in
4.7 in
Screen resolution
1280 x 768 pixels
1280 x 720 pixels
Resolution formats
  • HD
  • HD
Pixel density
332 ppi
312 ppi
Screen technology
AMOLED
IPS
Color depth
24 bit
24 bit
Touch screen
Touch screen type
Capacitive
Capacitive
Anti-scratch screen
Glass screen
Aspect ratio
1.667
1.778
Auto-rotate screen
Ambient light sensor
Proximity sensor

Main photo/video camera

Camera megapixels
8.7 Mp
5 Mp
Maximum photo resolution
3264 x 2448 pixels
2592 x 1936 pixels
Shooting resolution formats
  • Ultra HD
  • Quad HD
  • Full HD
  • HD
  • Quad HD
  • Full HD
  • HD
The presence of a flash
Flash type
Dual LED
LED
Digital zoom
4 X
Photomatrix type
CMOS BSI
CMOS
Photomatrix size
4.8 x 3.6 mm
3.6 x 2.7 mm
Photomatrix pixel size
1.351 μm
1.389 μm
Crop factor
7.21
9.61
Aperture
f/2
f/2.4
Number of lens elements
6
Shooting settings
Autofocus
Auto exposure
Face detector
Panoramic photography
HDR photography
Viewfinder
Continuous photography
Touch focus
Exposure compensation
Digital image stabilization
Optical image stabilization
White balance
ISO setting
Scene selection
Other photo settings
  • Story modes: auto
  • Night portrait
  • Close-up
  • White balance modes: cloudy
  • Incandescent light bulb
  • Daylight
  • Iso 100
  • Iso 200
  • Iso 400
  • Iso 800
  • Iso 1600
  • Iso 3200
  • Serial shooting
  • Panoramic shooting
  • Hdr shooting
  • Face detection
Video capability
Maximum video resolution
1920 x 1080 pixels
1280 x 720 pixels
Movie speed
30 fps
30 fps
Digital video zoom
4 X
Movie settings
Movie settings list
  • White balance
  • Color effects
  • Scene selection mode

Front photo/video camera

Front camera megapixels
1.3 Mp
2 Mp
Maximum photo resolution
1520 x 855 pixels
1886 x 1061 pixels
Aperture
f/2.4
f/2.8
Front camera video
Maximum video resolution
1280 x 720 pixels
640 x 480 pixels

SIM card and calls

Number of SIM-cards
1
1
SIM card type
Micro-SIM
Nano-SIM
MP3 ringtones
Polyphonic ringtones
Vibration mode
Speakerphone
Conference call
Speed dial
Video calls
Second microphone
Autodial
Noise reduction during a call
Ability to mute the microphone during a call
Extended phone book
Contacts in the phone book
Unlimited
Unlimited
Data exchange between SIM card and internal memory
VoIP telephony

Mobile communications

Cellular generation
4G
4G
GSM support
GSM frequencies
  • GSM 850 MHz
  • GSM 900 MHz
  • GSM 1800 MHz
  • GSM 1900 MHz
  • GSM 850 MHz
  • GSM 900 MHz
  • GSM 1800 MHz
  • GSM 1900 MHz
UMTS support
UMTS frequencies
  • UMTS 850 MHz
  • UMTS 900 MHz
  • UMTS 1700 MHz
  • UMTS 1900 MHz
  • UMTS 2100 MHz
  • UMTS 850 MHz
  • UMTS 900 MHz
  • UMTS 2100 MHz
LTE support
LTE frequencies
  • LTE 800 MHz
  • LTE 850 MHz
  • LTE 900 MHz
  • LTE 1800 MHz
  • LTE 1900 MHz
  • LTE 2100 MHz
  • LTE 2600 MHz
  • LTE 800 MHz
  • LTE 900 MHz
  • LTE 1800 MHz
  • LTE 2100 MHz
  • LTE 2600 MHz

Internet data transmission standards

LTE standards
  • LTE Cat 3
  • LTE Cat 4
Data transmission standards
  • HSPA+
  • HSUPA
  • HSDPA
  • EDGE
  • GPRS
  • HSPA+
  • HSUPA
  • HSDPA
  • EDGE
  • GPRS

Wi-Fi

Built-in Wi-Fi
Wi-Fi standards
  • 802.11a
  • 802.11b
  • 802.11g
  • 802.11n
  • 802.11n 5GHz
  • 802.11b
  • 802.11g
  • 802.11n
Wi-Fi hotspot mode
Dual band Wi-Fi

USB

USB connector
USB connector type
Micro USB
Micro USB
USB standard
2.0
2.0
USB Mass Storage support

Bluetooth

Built-in Bluetooth
Bluetooth standard
3.0
4.1
A2DP support
AVRCP support
Other Bluetooth profiles
  • OPP
  • HFP
  • PBAP
  • HFP
  • GATT
  • HOGP
  • MAP
  • PAN
  • OPP
  • PBAP
  • HID

Navigation and positioning

Built-in GPS
A-GPS support
Installed GLONASS
Built-in digital compass
Cell ID location

Radio

Built-in radio receiver
Radio range
87.5 - 108.0
87.5 - 108 МГц
RDS support
DRM support

Sensors and gauges

Ambient light sensor
Proximity sensor
Accelerometer
Orientation and rotation sensor
Gyroscope
Magnetometer

Connectors and interfaces

USB connector
Micro USB
Micro USB
TRS jack (mini/micro jack)
3.5 mm
3.5 mm
Wireless NFC

Images

Supported image formats
  • PNG
  • JPEG
  • EXIF
  • BMP
  • PNG
  • JPG
  • EXIF
  • GIF
Installed image editor
Geo tags
DLNA support
MTP support

Video

Installed video player
Supported video formats
  • MP4
  • MPEG-4
  • AVI
  • 3GPP
  • 3GPP
  • 3GPP2
  • QuickTime
  • MOV
  • H.263
  • H.264
  • WMV
  • MP4
  • MPEG-4
  • AVI
  • 3GPP
  • 3GPP
  • H.263
  • H.264
  • WMV
Video resolution formats
  • Full HD
  • HD
  • HD
Streaming video
Installed video editor
Geo tags

Audio

Installed audio player
Supported audio formats
  • AAC
  • AAC+
  • eAAC+
  • AMR
  • AMR-NB
  • AMR-WB
  • M4A
  • MIDI
  • MP3
  • WMA
  • WAV
  • AAC
  • eAAC+
  • AMR
  • AMR-NB
  • MIDI
  • MP3
  • WMA
  • WAV
MP3 support
Streaming audio
Dictaphone
Voice notes
TRS jack (mini/micro jack)
3.5 mm
3.5 mm

Control elements

Touch input
Multitouch
Pinch zoom
Russified input

Documents and office

Installed Organizer (PIM)
Office document support
Supported document formats
  • PDF
  • PDF
Email
IMAP4 protocol support
Convert text to speech
Convert speech to text

Connectivity and synchronization

PC connection
Tethering support
Synchronization over the mobile network
OTA sync
Synchronization with services
  • MS Outlook
  • MS Exchange
  • Gmail
  • Google Talk
  • Twitter
  • Windows Live Messenger
  • WhatsApp
  • Yahoo! Messenger
  • Skype IM
  • Facebook
  • YouTube
  • MS Outlook
  • MS Exchange
  • Windows Live Messenger
  • OneDrive

Software features

Installed browser
  • HTML
  • HTML5
  • CSS3
  • WAP
  • HTML
  • HTML5
  • CSS3
  • WAP

Installed games

Receiving and sending SMS

SMS messages
SMS T9 support
SMS output in the form of a chat
MMS support

Security

Remote phone lock
Remotely wipe data from your phone
Remote phone search
Remote phone tracking
Data encryption in the phone
Installed firewall
Installed VPN

Additional features

Standalone mode (flight mode)

SAR level

SAR level
0.81 W/kg