Product
Oppo A16s
Oppo A16s
Google Pixel 3a
Google Pixel 3a
Battery
Charging - 18W wired, PD2.0
Type Li-Po 5000 mAh Li-Po 3000 mAh, non-removable
Body
Build - Glass front (Asahi Dragontrail), plastic back, plastic frame
Dimensions 163.8 x 75.6 x 8.4 mm (6.45 x 2.98 x 0.33 in) 151.3 x 70.1 x 8.2 mm (5.96 x 2.76 x 0.32 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + eSIM
Weight 190 g (6.70 oz) 147 g (5.19 oz)
Comms
Bluetooth 5.0, A2DP, LE, aptX 5.0, A2DP, LE, aptX HD
NFC Yes Yes
Positioning GPS, GLONASS, GALILEO, BDS, QZSS GPS, GLONASS, GALILEO
Radio Unspecified No
USB USB Type-C 2.0, OTG USB Type-C 2.0
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Display
Protection - Asahi Dragontrail Glass
Resolution 720 x 1600 pixels, 20:9 ratio (~269 ppi density) 1080 x 2220 pixels, 18.5:9 ratio (~441 ppi density)
Size 6.52 inches, 102.6 cm2 (~82.9% screen-to-body ratio) 5.6 inches, 79.6 cm2 (~75.0% screen-to-body ratio)
Type IPS LCD, 480 nits (typ) OLED
Features
Sensors Fingerprint (side-mounted), accelerometer, proximity, compass Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass, barometer
Launch
Announced 2021, August 14 2019, May 07
Status Available. Released 2021, August 14 Available. Released 2019, May 15
Main Camera
Features LED flash, HDR, panorama Dual-LED flash, Pixel Shift, HDR, panorama
Single - 12.2 MP, f/1.8, 28mm (wide), 1/2.55", 1.4µm, dual pixel PDAF, OIS
Triple 13 MP, f/2.2, 26mm (wide), 1/3.06", 1.12µm, PDAF 2 MP, f/2.4, (macro) 2 MP, f/2.4, (depth) -
Video 1080p@30fps 4K@30fps, 1080p@30/60/120fps
Memory
Card slot microSDXC No
Internal 64GB 4GB RAM 64GB 4GB RAM
  eMMC 5.1 eMMC 5.1
Misc
Colors Pearl Blue, Crystal Black Just Black, Clearly White, Purple-ish
Models CPH2271 G020A, G020E, G020B, G020G, G020H
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 38, 39, 40, 41, 66 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 25, 26, 28, 32, 38, 40, 41, 66, 71
Speed HSPA, LTE HSPA 42.2/5.76 Mbps, LTE (3CA) Cat11 600/75 Mbps
Technology GSM / HSPA / LTE GSM / CDMA / HSPA / EVDO / LTE
  - CDMA2000 1xEV-DO
Platform
Chipset Mediatek MT6765G Helio G35 (12 nm) Qualcomm SDM670 Snapdragon 670 (10 nm)
CPU Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53) Octa-core (2x2.0 GHz 360 Gold & 6x1.7 GHz Kryo 360 Silver)
GPU PowerVR GE8320 Adreno 615
OS Android 11, ColorOS 11.1 Android 9.0 (Pie), upgradable to Android 12
Selfie camera
Features HDR HDR
Single 8 MP, f/2.0, 26mm (wide) 8 MP, f/2.0, 24mm (wide), 1/4.0", 1.12µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes, with stereo speakers