HTC Desire 728 vs HTC Desire 820 vs HTC ONE M8 Dual Sim

BASIC INFO
Model No - 2014, September -
Status release 2015, September Available. Released 2014, November Available. Released 2014, July
Release Date 2014, july 2014, August 2014, June
Dimension 157.8 x 76.8 x 7.9 mm 157.7 x 78.7 x 7.7 mm (6.21 x 3.10 x 0.30 in) 146.4 x 70.6 x 9.4 mm (5.76 x 2.78 x 0.37 in)
Weight 153 g 155 g (5.47 oz) 160 g (5.64 oz)
Colors Various Marble White, Tuxedo Grey, Santorini White, Milky-way Grey, Tangerine White, Saffron Grey, Flamingo Grey, Blue Misty, Monarch Orange Gunmetal Gray, Glacial Silver, Amber Gold
Body Metrial - - -
W & D Proof - - -
SIM Type - Nano-SIM Dual SIM (Nano-SIM, dual stand-by)
Technology - GSM / HSPA / LTE GSM / HSPA / LTE
OS Android OS, v5.1 LollyPop Android OS, v4.4.2 (KitKat) Android OS, v4.4.2 (KitKat)
PROSESSING
Processor Mediatek MT6753, Octa-core 1.3 GHz Cortex-A53, Mali-450 GPU Quad-core 1.5 GHz Cortex-A53 & quad-core 1.0 GHz Cortex-A53 Quad-core 2.3 GHz
Chipset - Qualcomm MSM8939 Snapdragon 615 Qualcomm Snapdragon 801
GPU - Adreno 405 Adreno 330
MEMORY
RAM - 2GB 2GB
Storage - 16GB 16GB
Card Slot 16 GB Storage, 2GB RAM, microSD, up to 32 GB up to 128 GB (dedicated slot) up to 128 GB (dedicated slot)
DISPLAY
Size 720 x 1280 pixels, 5.5 inches 5.5 inches 5.0 inches
Type AMOLED LCD capacitive touchscreen, 16M colors Super LCD3 capacitive touchscreen, 16M colors Super LCD3 capacitive touchscreen, 16M colors
Resolation - 720 x 1280 pixels 1080 x 1920 pixels
PPI - 267 ppi pixel density 441 ppi pixel density
Multi touch - Yes Yes
Protection - Corning Gorilla Glass 3, HTC Sense UI 6.0 Corning Gorilla Glass 3, HTC Sense UI 6.0
CAMERA
Primary 13 MP, 4160 x 3120 pixels, autofocus, LED flash 13 MP 4160 x 3120 pixels, Autofocus Dual 4 MP, autofocus
Video 1080p@30fps, 720p@60fps, HDR, stereo sound Yes, 720p@30fps Yes, 1080p@30fps, 720p@60fps, HDR, stereo sound rec., video stabilization
Flash - Led flash Led flash
Features - Geo-tagging, touch focus, face detection, HDR 1/3 Inches sensor size, 2µm pixel size, geo-tagging, face/smile detection, HDR, panorama
Selfie 5 MP Yes, 8 MP 5 MP, 1080p@30fps, HDR
BATTERY
Battery Standard Li-Ion 2800 mAh removeable battery Li-Po Li-Po
Capacity - 2600 mAh 2600 mAh
Removable - Non-removable Non-removable
StandBy - Up to 424 h (3G) -
Talk Time - Up to 22 h 24 min (3G) -
Music Play - - -
Browsing - - -
Video Playback - - -
F Charging - - -
W Charging - - -
NETWORK
2G Network GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G Network HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100 - EMEA, Asia
HSDPA 850 / 900 / 2100 - Europe
TD-SCDMA - Asia
HSDPA 850 / 900 / 1900 / 2100
4G Network LTE 700 / 850 / 900 / 1800 / 2100 / 2600 (Bands 1, 3, 5, 7, 8, 28 LTE band 3(1800), 7(2600), 8(900), 20(800) - Europe
LTE band 1(2100), 3(1800), 7(2600), 8(900) - EMEA
LTE band 1(2100), 3(1800), 7(2600), 8(900), 28(700), 38(2600), 39(1900), 40(2300), 41(2500) - Asia
LTE
Speed - HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps HSPA 21.1/5.76 Mbps, LTE Cat4 150/50 Mbps
5G - - -
CONECTIVY
WALAN Wi-Fi 802.11 a/ac/b/g/n, Wi-Fi Direct, DLNA, Wi-Fi hotspot Wi-Fi 802.11 a/b/g/n, dual-band, Wi-Fi Direct, DLNA, hotspot Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA, hotspot
BlueTooth Yes, v4.0 with apt-x v4.0, A2DP, apt-X v4.0, A2DP, apt-X
USB Yes, microUSB v2.0 (MHL) microUSB v2.0, USB Host microUSB v2.0 (MHL TV-out), USB Host
GPS Yes, with A-GPS Yes, with A-GPS, GLONASS Yes, with A-GPS, GLONASS
NFC - Yes (optional) Yes (market/operator dependent)
Audio jeck - Yes, 3.5mm Yes, 3.5mm
OTHERS
Sensors - Accelerometer, proximity, compass Accelerometer, gyro, proximity, compass, barometer
Radio TBD FM radio Stereo FM radio with RDS
SARUS - - -
SAREU - - -
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