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HTC Desire 820 vs Infinix Zero 40

2G Network GSM 850 / 900 / 1800 / 1900 SIM1: GSM 850 / 900 / 1800 / 1900SIM2: GSM 850 / 900 / 1800 / 1900  
3G Network HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100  
4G Network LTE 900 / 1800 / 2100 / 2600 LTE band 1(2100), 3(1800), 5(850), 8(900), 38(2600), 40(2300), 41(2500)  
Dimensions 157.7 x 78.7 x 7.7 mm 164.3 x 74.6 x 7.7 mm  
Sim Type Dual Sim, Dual Standby (Nano-SIM)  
Weight 155 g 180 g  
Display Type LCD capacitive touchscreen, 16M colors, HTC Sense UI v6 AMOLED Capacitive Touchscreen, 1B, Multitouch   120Hz, 1300 nits (HBM), Always-on display  
Display Size 720 x 1280 pixels, 5.5 inches (~267 ppi) 6.78 Inches   1080 x 2436 Pixels (~393 PPI)  
Multitouch Yes
Protection Corning Gorilla Glass 5  
Memory 16GB built-in 256GB Built-in, 8GB RAM (+8GB Extended RAM), UFS 2.2  
Card slot microSD card (supports up to 128GB) Unspecified  
RAM 2GB RAM
GPRS Yes Yes
WLAN WLAN (Wi-Fi 802.11 a/b/g/n Wi-Fi 802.11 a/b/g/n/ac, dual-band  
BlueTooth Bluetooth v4.0 v5.3 with A2DP, LE  
USB USB (microUSB v2.0) USB Type-C 2.0, OTG  
NFC Yes  
GPS Yes Yes + A-GPS support  
Main Camera 13MP, 4160 x 3120 pixels, autofocus, LED flash, Geo-tagging, touch focus, face detection, simultaneous HD video and image recording, HDR, Video (1080p@30fps, 720p@60fps), Triple Camera: 108 MP, f/1.8, (wide), 1/1.67", PDAF, OIS + 50 MP, f/2.0, (ultrawide), 1/2.76", PDAF + 2 MP, f/2.4, (depth), Dual LED Flash   HDR, panorama, Video (1440p@30fps, 1080p@30/60fps, gyro-EIS, OIS)  
Front Camera 8MP, 1080p 50 MP, f/2.5, 21mm (wide), 1/2.76", PDAF, Dual LED Flash, Video (1440p@30fps, 1080p@30/60fps)  
OS Android OS, v4.4.2 (KitKat) Android 14 OS, up to 2 major Android upgrades  
Chipset Qualcomm MSM89 Mediatek Helio G100 (6 nm)  
Processor 1.5 GHz Quad-Core Cortex-A53, 1.0 GHz Quad-core Cortex-A53 Octa-core (2 x 2.2 GHz Cortex-A76 + 6 x 2.0 GHz Cortex-A55)  
GPU GPU: Adreno 405 Mali-G57 MC2  
Sensors Accelerometer, proximity, compass Accelerometer, Compass, Fingerprint (under display, optical), Gyro, Proximity  
Browser HTML5 HTML5  
Sound 3.5mm audio jack, MP4/H.263/H.264/WMV player, MP3/eAAC+/WMA/WAV player, SNS integration, YouTube, Google Talk, Games (built-in + downloadable) 24-bit/192kHz Hi-Res & Hi-Res Wireless audio, Tuned by JBL, Dual Speaker  
Colors Marble White, Tuxedo Grey, Santorini White, Milky-way Grey, Tangerine White, Saffron Grey, Flamingo Grey, Blue Misty, Monarch Orange Misty Aqua, Rock Black, Blossom Glow  
Battery Talk-Time up to 22 hrs 24 min 2600 mAh (Non removable), 5000 mAh   - Fast Charging 45W wired, 50% in 25 min (advertised), 10W reverse wired, Bypass Charging 2.0  
StandBy Time Stand-by up to 424 hrs
Misc GPS + A-GPS support & GLONASS, Document editor, Photo viewer/editor, Google Search, Maps, Gmail, Voice memo/dial/commands, Predictive text input, YouTube, Calendar, Speakerphone SMS(threaded view), MMS, Email, Push Mail, IM   IP54, dust and splash resistant, Photo/video editor, Document viewer