Phone Comparison - Nokia Lumia 820 vs HTC Windows Phone 8X vs Nokia Lumia 635

general General Info

Manufacturer Nokia HTC Nokia
Announced Expected September 2012 September 2012 April 2014
Status Available - November 2012 Available - November 2012 Available - May 2014
Colors Black, Gray, Red, Yellow, White, Blue, Violet Blue, Black, Yellow, Red 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)
132.3 x 66.2 x 10.1 mm
(5.21 x 2.61 x 0.4 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) 130 g (4.59 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 HSDPA 850 / 900 / 1900 / 2100
4G Network LTE 800 / 1800 / 2600 / 2100/ 900 - 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 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 GB storage 8 GB
External Memory microSD, up to 32 GB microSD, up to 32GB microSD, up to 64 GB

display Display

Type AMOLED capacitive touchscreen S-LCD2 capacitive touchscreen IPS LCD capacitive touchscreen
Colors 16M colors 16M colors 16M colors
Size 4.3 inches 4.3 inches 4.5 inches
Resolution 480 x 800 pixels (217 ppi) 720 x 1280 pixels (342 ppi) 480 x 854 pixels (218 ppi)
Screen-to-Body Ratio 62.04% 58.04% 64.43%
Multi-Touch yes yes yes

multimedia Multimedia

3.5mm Jack yes yes yes
Radio No No 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 MP, 3264 x 2448 pixels 5 MP, 2592 х 1944 pixels
Flash LED flash 28mm wide No
Features Auto focus, Geo-tagging Auto focus, Geo-tagging, Touch Focus Geo-tagging
Video Yes Yes, 1080p@30fps, continuous autofocus, video light Yes, 720p@30fps
Front Camera Yes [Similar] Yes, 2.1 MP, 1080p video [Similar] No [Similar]

connectivity Connectivity and Data Rate

GPRS Yes Yes Yes
Edge Yes Yes Yes
3G HSDPA, 42 Mbps
HSUPA, 5.76 Mbps
LTE, Cat3, 50 Mbps UL, 100 Mbps DL
HSDPA; HSUPA HSDPA, 21 Mbps; HSUPA, 5.76 Mbps; LTE, Cat3, 50 Mbps UL, 100 Mbps DL
Bluetooth Yes, v3.1 with A2DP, EDR Yes, v2.1 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 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 GB storage, 1 GB RAM 8 GB, 512 MB RAM
Expandable Storage microSD, up to 32 GB microSD, up to 32GB 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 Standard battery, Li-Ion Li-Ion Battery
Capacity 1650 mAh 1800 mAh 1830 mAh
Stand by Up to 330 h (2G)
Up to 330 h (3G)
Up to 648 h
Talk Time Up to 14 h (2G)
Up to 8 h (3G)
Up to 12 h (2G)
Up to 14 h (3G)