HTC One M8 Max vs HTC ONE (M8) vs HTC Desire 820G Plus Dual SIM

BASIC INFO
Model No One M8 Max HTC M8 -
Status Available Available. Released 2014, March Available. Released 2015 july
Release Date Released 2014, October 2014,March 2015, July
Dimension 141.4 mm hight 72.2 mm widh 8.7 mm thiknes 146.4 x 70.6 x 9.4 mm (5.76 x 2.78 x 0.37 in) 157.7 x 78.7 x 7.7 mm (6.21 x 3.10 x 0.30 in)
Weight 153 grames 160 g (5.64 oz) 155 g (5.47 oz)
Colors Black, White, Orange Gunmetal Gray, Glacial Silver, Amber Gold Black, White, Red, Gray, Green
Body Metrial - - -
W & D Proof - - -
SIM Type Micro SIM Supported Nano-SIM -
Technology GSM / HSPA / LTE GSM / HSPA / LTE -
OS Android OS, v5.0 (Lollypop) Android OS, v4.4.2 (KitKat) Android OS, v4.4.2 (KitKat)
PROSESSING
Processor Quad-core 2.7 GHz Krait 400 Quad-core 2.3 GHz (US/EMEA)/ 2.5 GHz (Asia, China) Krait 400 Octa-core 1.7 GHz Cortex-A53
Chipset Qualcomm MSM8974AB Snapdragon 801 Qualcomm MSM8974AB Snapdragon 801 -
GPU Adreno 330 Adreno 330 -
MEMORY
RAM 3 GB 2GB -
Storage 16/32 GB 16/32GB -
Card Slot - up to 128 GB (dedicated slot) 16 GB, 1 GB RAM, microSD, up to 128 GB
DISPLAY
Size 5.5 inches 5.0 inches 720 x 1280 pixels, 5.5 inches (~267 ppi pixel density)
Type Super LCD3 capacitive touchscreen, 16M colors Super LCD3 capacitive touchscreen, 16M colors TFT capacitive touchscreen, 16M colors
Resolation 1440 x 2560 pixels 1080 x 1920 pixels -
PPI 538 ppi 441 ppi pixel density -
Multi touch Yes Yes -
Protection - Corning Gorilla Glass 3, HTC Sense UI 6.0 -
CAMERA
Primary 18 MP, Autofocus Dual 4 MP, f/2.0, 27mm, autofocus 13 MP, 4164 x 3096 pixels, autofocus, LED flash
Video Yes, 1080p@30fps, 720p@60fps 1080p@60fps, 720p@120fps, HDR, stereo sound rec 1080p@30fps, HDR, stereo sound
Flash LED Flash Led flash -
Features Geo-tagging, touch focus, face detection, HDR, panorama 1/3 Inches sensor size, 2µm pixel size, geo-tagging, face/smile detection, HDR, panorama -
Selfie Yes, 5 MP 5 MP, f/2.0, 1080p@30fps, HDR Yes, 8 MP, 720p@30fps, HDR
BATTERY
Battery Li-Po battery Li-Po Li-Po 2600 mAh removeable battery
Capacity 3000 mAh 2600 mAh -
Removable Non-removable Non-removable -
StandBy - Up to 271 h (2G) / Up to 496 h (3G) -
Talk Time - Up to 14 h (2G) / Up to 20 h (3G) -
Music Play - - -
Browsing - - -
Video Playback - - -
F Charging No - -
W Charging No - -
NETWORK
2G Network GSM 850 / 900 / 1800 / 1900 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 / 1900 / 2100 - AT&T
HSDPA 850 / 1700 / 1900 / 2100 - T-Mobile
HSDPA 850 / 900 / 1900 / 2100
4G Network LTE 800 / 900 / 1800 / 2600 LTE band 3(1800), 7(2600), 8(900), 20(800) - EMEA
LTE band 1(2100), 3(1800), 7(2600), 8(900), 28(700) - Asia
LTE band 4(1700/2100), 17(700) - T-Mobile
LTE band 2(1900), 4(1700/2100), 5(850), 7(2600), 17(700) - AT&T LTE band 40(2300) - India
LTE 900 / 1800 / 2100 / 2600
Speed HSDPA, 42 Mbps (21 Mbps - AT&T), HSUPA, 5.76 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL  HSPA 42.2/21.1(AT&T)/5.76 Mbps, LTE Cat4 150/50 Mbps -
5G - - -
CONECTIVY
WALAN Wi-Fi 802.11 a/b/g/n/ac, 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 Wi-Fi 802.11 a/ac/b/g/n, Wi-Fi Direct, DLNA, Wi-Fi hotspot
BlueTooth Yes v4.0, A2DP, apt-X Yes, v4.0 with A2DP
USB Yes, microUSB v2.0 microUSB v2.0 (MHL TV-out), USB Host Yes, microUSB v2.0 (MHL)
GPS Yes, with A-GPS Yes, with A-GPS, GLONASS Yes, with A-GPS support and GLONASS
NFC - Yes (market/operator dependent) -
Audio jeck 3.5mm Jack Yes, 3.5mm -
OTHERS
Sensors Light sensor, Proximity sensor Accelerometer, gyro, proximity, compass, barometer -
Radio - Stereo FM radio with RDS TBD
SARUS - - -
SAREU - 0.42 W/kg (head) 0.22 W/kg (body) -
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