Phone Comparison - Nokia Lumia 820 vs Nokia Lumia 925 vs Nokia Lumia 635

general General Info

Manufacturer Nokia Nokia Nokia
Announced Expected September 2012 May 2013 April 2014
Status Available - November 2012 Available - June 2013 Available - May 2014
Colors Black, Gray, Red, Yellow, White, Blue, Violet Black, White Orange, Yellow, White, Black
Form Factor Candybar Candybar Candybar
Dimension 123.8 x 68.5 x 9.9 mm
(4.87 x 2.7 x 0.39 in)
129 x 70.6 x 8.5 mm
(5.08 x 2.78 x 0.33 in)
129.5 x 66.7 x 9.2 mm
(5.1 x 2.63 x 0.36 in)
Weight 160 g (5.64 oz) 139 g (4.9 oz) 134 g (4.73 oz)
2G Network GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G Network HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100 - RM-892, RM-893
HSDPA 850 / 900 / 1700 / 1900 / 2100 - RM-910
HSDPA 850 / 900 / 1900 / 2100
4G Network LTE 800 / 1800 / 2600 / 2100/ 900 LTE 800 / 900 / 1800 / 2100 / 2600 - RM-892
LTE 700 / 1700 / 2100 - RM-893
LTE
Messaging SMS, MMS, Push Mail, EMail, IM SMS, MMS, Push Mail, EMail, IM SMS, MMS, Push Mail, EMail, IM

hardware Hardware and OS

OS Microsoft Windows Phone 8 Microsoft Windows Phone 8 Microsoft Windows Phone 8.1
Processor Dual-core 1.5 GHz Krait, Qualcomm MSM8960 Snapdragon Dual-core 1.5 GHz Krait, Qualcomm MSM8960 Snapdragon Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 400
GPU Adreno 225 Adreno 225 Adreno 305
RAM 1 GB 1 GB 512 MB
Internal Memory 8 GB storage 16/32 GB storage 8 GB
External Memory microSD, up to 32 GB No microSD, up to 64 GB

display Display

Type AMOLED capacitive touchscreen AMOLED capacitive touchscreen IPS LCD capacitive touchscreen
Colors 16M colors 16M colors 16M colors
Size 4.3 inches 4.5 inches 4.5 inches
Resolution 480 x 800 pixels (217 ppi) 768 x 1280 pixels (332 ppi) 480 x 854 pixels (218 ppi)
Screen-to-Body Ratio 62.04% 63.18% 64.43%
Multi-Touch yes yes yes

multimedia Multimedia

3.5mm Jack yes yes yes
Radio No FM radio No
Games Yes + Downloadable Yes + Downloadable Yes + Downloadable
Loud Speaker yes yes yes

camera Camera

Rear Camera 8 MP, 3264x2448 pixels, Carl Zeiss Tessa 8.7 MP, 3264 x 2448 pixels 5 MP, 2592 х 1944 pixels
Flash LED flash Dual-LED flash No
Features Auto focus, Geo-tagging PureView Technology, Geo-tagging, Touch Focus, Optical image stabilization, Still image editor, Face recognition Geo-tagging
Video Yes Yes, 1080p@30fps, video stabilization Yes, 720p@30fps
Front Camera Yes [Similar] Yes, 1.2 MP wide Angle, 720p@30fps [Similar] No [Similar]

connectivity Connectivity and Data Rate

GPRS Yes Class 12 (4+1/3+2/2+3/1+4 slots), 32 - 48 kbps Yes
Edge Yes Up to 236.8 kbps Yes
3G HSDPA, 42 Mbps
HSUPA, 5.76 Mbps
LTE, Cat3, 50 Mbps UL, 100 Mbps DL
HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps; LTE, Cat3, 50 Mbps UL, 100 Mbps DL HSDPA, 21 Mbps; HSUPA, 5.76 Mbps; LTE, Cat3, 50 Mbps UL, 100 Mbps DL
Bluetooth Yes, v3.1 with A2DP, EDR Yes, v4.0 with A2DP, EDR Yes, v4.0 with A2DP
Wi-Fi Wi-Fi 802.11 b/g/n Wi-Fi 802.11 a/b/g/n, dual-band, DLNA, Wi-Fi hotspot Wi-Fi 802.11 b/g/n
USB Yes, microUSB v2.0 Yes, microUSB v2.0 Yes, microUSB v2.0
GPS Yes, with A-GPS support Yes, with A-GPS support and GLONASS Yes, with A-GPS support and GLONASS
Browser HTML5 HTML5 HTML5

memory User Memory

Internal 8 GB storage, 1 GB RAM 16/32 GB storage, 1 GB RAM 8 GB, 512 MB RAM
Expandable Storage microSD, up to 32 GB No microSD, up to 64 GB

Apps Sensors

Fingerprint fingerprint not supported fingerprint not supported fingerprint not supported
Proximity Sensor proximity sensor present proximity sensor present proximity sensor present
Accelerometer Sensor accelerometer sensor present accelerometer sensor present accelerometer sensor present
NFC NFC supported NFC supported NFC not supported

battery Battery

Type Standard battery, Li-Ion Non-removable Li-Ion Battery (BL-4YW) Li-Ion Battery
Capacity 1650 mAh 2000 mAh 1830 mAh
Stand by Up to 330 h (2G)
Up to 330 h (3G)
Up to 440 h (3G) Up to 648 h
Talk Time Up to 14 h (2G)
Up to 8 h (3G)
Up to 18 h 18 min (2G)
Up to 12 h 48 min (3G)
Up to 12 h (2G)
Up to 14 h (3G)