Phone Comparison - HTC Desire 820s dual sim vs Oppo A57 vs Oppo A77 (Mediatek)

general General Info

Manufacturer HTC Oppo Oppo
Announced March 2015 November 2016 May 2017
Status Available - March 2015 Available - January 2017 Available - May 2017
Price Rs. 27,900 ($410.29) [Similarly Priced] Rs. 14,990 ($240.00) [Similarly Priced] Rs. 23,580 ($363.00) [Similarly Priced]
Colors Marble White, Milkyway Gray, Monarch Orange, Santorini White, Tu Gold, Rose Gold Gold, Rose Gold
Form Factor Candybar Candybar Candybar
Dimension 157.7 x 78.7 x 7.7 mm
(6.21 x 3.1 x 0.3 in)
149.1 x 72.9 x 7.65 mm
(5.87 x 2.87 x 0.3 in)
153.29 x 75.24 x 7.3 mm
(6.04 x 2.96 x 0.29 in)
Weight 155 g (5.47 oz) 147 g (5.19 oz) 153 g (5.4 oz)
SIM Type - Dual-SIM Dual SIM (Nano-SIM, dual stand-by)
2G Network GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
TD-SCDMA 1900 / 2000
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
CDMA2000 1xEV-DO - A59m
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G Network HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1900 / 2100
4G Network LTE 900 / 1800 / 2100 / 2600 TD-LTE 1900 / 2300 / 2500 / 2600
(Bands 1, 3, 7, 8, 38, 39, 40, 41)
LTE band 3(1800), 7(2600), 38(2600), 39(1900), 40(2300), 41(2500) LTE
Messaging SMS, MMS, Push Mail, EMail SMS, MMS, Push Mail, EMail SMS, MMS, Push Mail, EMail
Build Features - - Fingerprint Sensor
- Metal Build
- 2.5D Curved Glass
- Fingerprint Sensor
Notification LED - Yes Yes

hardware Hardware and OS

OS Android OS, v4.4.4 (KitKat) Android OS, v6.0 (Marshmallow) Android OS, v6.0 (Marshmallow)
User Interface - ColorOS 3.0 -
Processor Octa-core 1.7 GHz Cortex-A53, Mediatek MT6752 Octa-core 1.4 GHz Cortex-A53, Qualcomm MSM8940 Snapdragon 435 Octa-core (4x1.8 GHz Cortex-A53 & 4x1.0 GHz Cortex-A53), MediaTek MT6750T
GPU Mali-T760MP2 Adreno 505 Mali-T880 MP2
RAM 2 GB 3 GB 4 GB
Internal Memory 16 GB 32 GB 64 GB
External Memory microSD, up to 32 GB microSD, up to 128 GB (uses SIM 2 slot) microSD, up to 256 GB (uses SIM 2 slot)

display Display

Type Capacitive Touchscreen, Corning Gorilla Glass 3 IPS LCD capacitive touchscreen IPS LCD Capacitive Touchscreen
Colors 16M colors 16M colors 16M colors
Size 5.5 inches 5.2 inches 5.5 inches
Resolution 720 x 1280 pixels (267 ppi) 720 x 1280 pixels (282 ppi) 1080 x 1920 pixels (401 ppi)
Screen-to-Body Ratio 67.20% 68.79% 72.13%
Multi-Touch yes yes yes

multimedia Multimedia

3.5mm Jack yes yes yes
Radio FM radio FM radio FM Radio
Games Yes + Downloadable Yes + Downloadable Yes + Downloadable
Loud Speaker yes yes yes

camera Camera

Rear Camera 13 MP, 4160 x 3120 pixels 13 MP 13 MP
Flash LED flash LED Flash LED Flash
Features Auto focus, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama Phase Detection Autofocus, f/2.2, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama Phase Detection Autofocus, f/2.2, Geo-tagging, Touch Focus, Face Detection, HDR, Panorama
Video 1080p@30fps 1080p@30fps 1080p@30fps
Front Camera 8 MP, 1080p [Similar] 16 MP [Similar] 16 MP, f/2.0 [Similar]

connectivity Connectivity and Data Rate

GPRS Yes Yes Yes
Edge Yes Yes Yes
3G HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps HSPA, LTE, VoLTE HSPA, LTE, VoLTE
Bluetooth v4.0, A2DP v4.1, A2DP 4.2, A2DP
Wi-Fi Wi-Fi 802.11 b/g/n, hotspot Wi-Fi 802.11 a/b/g/n, hotspot Wi-Fi 802.11 b/g/n, hotspot
USB microUSB v2.0 microUSB v2.0, USB Host microUSB 2.0
GPS Yes, with A-GPS, GLONASS Yes, with A-GPS Yes, with A-GPS
Browser HTML5 HTML5 HTML5

memory User Memory

Internal 16 GB, 2 GB RAM 32 GB, 3 GB RAM 64 GB, 4 GB RAM
Expandable Storage microSD, up to 32 GB microSD, up to 128 GB (uses SIM 2 slot) microSD, up to 256 GB (uses SIM 2 slot)
USB OTG - Supported Not Supported

Apps Sensors

Fingerprint fingerprint not supported fingerprint supported fingerprint 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 not supported NFC not supported NFC not supported

battery Battery

Type Non-removable Li-Po Battery Non-removable Li-Ion Battery Non-removable Li-Ion Battery
Capacity 2600 mAh 2900 mAh 3200 mAh
Stand by Up to 560 h (3G) - -
Talk Time Up to 12 h 10 min (3G) - -