HTC Desire 510 vs HTC Desire 820 vs HTC One M8s

General Info

Manufacturer
HTC	HTC	HTC
Announced
August 2014	September 2014	April 2015
Status
Available - August 2014	Coming Soon - September 2014	Available - May 2015
Price
-	-	Rs. 20,499 ($301.46) [Similarly Priced]
Colors
Black, White	Marble White, Tuxedo Grey, Santorini White, Milky-way Grey, Tang	Gunmetal Gray, Glacial Silver, Amber Gold
Form Factor
Candybar	Candybar	Candybar
Dimension
139.9 x 69.8 x 9.99 mm (5.51 x 2.75 x 0.39 in)	157.7 x 78.7 x 7.7 mm (6.21 x 3.1 x 0.3 in)	146.4 x 70.6 x 9.6 mm (5.76 x 2.78 x 0.38 in)
Weight
158 g (5.57 oz)	155 g (5.47 oz)	160 g (5.64 oz)
2G Network
GSM 850 / 900 / 1800 / 1900	GSM 850 / 900 / 1800 / 1900	GSM 850 / 900 / 1800 / 1900
3G Network
HSDPA 850 / 900 / 2100	HSDPA 850 / 900 / 1900 / 2100 - EMEA version HSDPA 900 / 2100 - Asia version	HSDPA 850 / 900 / 1900 / 2100 - EMEA, Asia HSDPA 850 / 1700 / 1900 / 2100 - T-Mobile
4G Network
LTE 800 / 1800 / 2600	LTE 900 / 1800 / 2100 / 2600 - EMEA version	LTE band 3(1800), 7(2600), 8(900), 20(800) - EMEA
Messaging
SMS, MMS, Push Mail, EMail, IM	SMS, MMS, Push Mail, EMail	SMS, MMS, Push Mail, EMail

OS
Android OS, v4.4.2 (KitKat) with HTC Sense	Android OS, v4.4.2 (KitKat)	Android OS, v5.0 (Lollipop)
Processor
Quad-core 1.2 GHz Cortex-A7, Qualcomm Snapdragon 410	Quad-core 1.5 GHz Cortex-A53 & quad-core 1.0 GHz Cortex-A53, Qualcomm MSM8939 Snapdragon 615	Quad-core 1 GHz Cortex-A53 & Quad-core 1.7 GHz Cortex-A57, Qualcomm MSM8939 Snapdragon 615
GPU
Adreno 305	Adreno 405	Adreno 405
RAM
1 GB	2 GB	2 GB
Internal Memory
8 GB	16 GB	16/32 GB
External Memory
microSD, up to 128 GB	microSD, up to 128 GB	microSD, up to 128 GB

Type
TFT Capacitive Touchscreen	LCD Capacitive Touchscreen	Super LCD3 Capacitive Touchscreen, Corning Gorilla Glass 3
Colors
16M colors	16M colors	16M colors
Size
4.7 inches	5.5 inches	5.0 inches
Resolution
480 x 854 pixels (208 ppi)	720 x 1280 pixels (267 ppi)	1080 x 1920 pixels (441 ppi)
Screen-to-Body Ratio
62.60%	67.20%	66.55%
Multi-Touch

Rear Camera
5 MP, 2592х1944 pixels	13 MP, 4160 x 3120 pixels	13 MP, 4128 x 3096 pixels
Flash
LED flash	LED flash	Dual-LED flash
Features
Auto focus, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama	Auto focus, Geo-tagging, Touch Focus, Face Detection, Simultaneous HD Video And Image Recording, HDR	Auto-focus, OIS, Automatic Simultaneous Video And Image Recording, Geo-tagging, Face/smile Detection, HDR, Panorama
Video
Yes, 720p@30fps	1080p@30fps, 720p@60fps	1080p@60fps, 720p@120fps, HDR, stereo sound rec.
Front Camera
Yes, VGA	8 MP, 1080p	5 MP, 1080p@30fps, HDR

GPRS
Yes	Yes	Yes
Edge
Yes	Yes	Yes
3G
HSDPA, 42.2 Mbps; HSUPA, 5.76 Mbps	HSDPA, 42 Mbps; HSUPA, 5.8 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL	HSPA 42.2/21.1(AT&T)/5.76 Mbps, LTE Cat4 150/50 Mbps
Bluetooth
Yes, v4.0 with A2DP, LE	v4.0, A2DP	v4.0, A2DP, apt-X
Wi-Fi
Wi-Fi 802.11 b/g/n, Wi-Fi hotspot	Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi Direct, DLNA, Wi-Fi hotspot	Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA, hotspot
USB
Yes, microUSB v2.0, USB Host	microUSB v2.0	microUSB v2.0 (MHL TV-out), USB Host
GPS
Yes, with A-GPS support and GLONASS	Yes, with A-GPS, GLONASS	Yes, with A-GPS, GLONASS
Browser
HTML5	HTML5	HTML5