| Hardware and OS | LG G3 | Oppo A3s |
| Operating system | Android 4.4.2 (KitKat), upgradable to 6.0 (Marshmallow) | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | Quad-core 2.5 GHz Krait 400 | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | Qualcomm MSM8974AC Snapdragon 801 (28 nm) | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | Adreno 330 | Adreno 506 |
| Internal memory | 16GB 2GB RAM, 32GB 3GB RAM | 16 GB, 2 GB RAM |
| External memory | microSDXC (dedicated slot) | microSD, up to 256 GB (dedicated slot) |
| Display | LG G3 | Oppo A3s |
| Type | True HD-IPS LCD | IPS LCD |
| Size | 5.5 inches, 82.2 cm2 | 6.2" inc |
| Resolution | 1440 x 2560 pixels, 16:9 ratio | 720 x 1520 px |
| Touchscreen | | capacitive touchscreen |
| Protection | Corning Gorilla Glass 3 | |
| Screen-to-Body Ratio | | 81.2% |
| Display area | | 95.9 cm2 |
| Display aspect ratio | | 19:9 (height:width) |
| Pixel Density | | 271 PPI |
| Colors | | 16M |
| Main Camera | LG G3 | Oppo A3s |
| Camera | 13 MP, f/2.4, 29mm (standard), 1/3.1", 1.12µm, PDAF, Laser AF, OIS | |
| Features | Dual-LED dual-tone flash, panorama, HDR | |
| Video | 4K@30fps, 1080p@30fps, HDR, stereo sound rec. | |
| Selfie camera | LG G3 | Oppo A3s |
| Camera | 2.1 MP, f/2.0 | |
| Video | 1080p@30fps | |
| Connectivity | LG G3 | Oppo A3s |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - all versions | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA 850 / 900 / 1900 / 2100 - D855 | HSDPA 850 / 900 / 2100 |
| 4G Network | 2, 4, 7, 17 - D851 | LTE |
| Wi-Fi | | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot |
| Network | | GSM / HSPA / LTE |
| SIM card | | Dual SIM (Nano-SIM, dual stand-by) |
| Bluetooth | 4.0, A2DP, LE, aptX | 4.2, A2DP, LE |
| CDMA | HSDPA 850 / 1900 / 2100 - D850 | |
| Edge | | Yes |
| GPRS | | Yes |
| GPS | Yes, with A-GPS, GLONASS | Yes, with A-GPS |
| Speed | HSPA 42.2/21.1 Mbps, LTE Cat4 150/50 Mbps | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| USB | microUSB 2.0 (SlimPort), USB On-The-Go | microUSB 2.0, USB On-The-Go |
| Infrared port | Yes | |
| NFC | Yes | |
| Technology | GSM / HSPA / LTE | |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA, hotspot | |
| Camera | LG G3 | Oppo A3s |
| Main camera | | 13 MP, Dual |
| Specs | | 13 MP, f/2.2, AF
-2 MP, f/2.4, depth sensor |
| Features | | LED flash, HDR, panorama |
| Video | | 1080p@30fps |
| Selfie camera | | 8 MP, Single |
| Multimedia | LG G3 | Oppo A3s |
| 3.5 mm Jack | Yes | Yes |
| Radio | Stereo FM radio, RDS - D855 model only | FM radio |
| Loudspeaker | Yes | |
| Multimedia | 24-bit/192kHz audio | |
| Design | LG G3 | Oppo A3s |
| Colors | Metallic Black, Silk White, Shine Gold, Moon Violet, Burgundy Red, Blue Steel | Red, Dark Purple |
| Dimensions | 146.3 x 74.6 x 8.9 mm (5.76 x 2.94 x 0.35 in) | 156.2 x 75.6 x 8.2 mm |
| Weight | 149 g (5.26 oz) | 168 g |
| Body build | Glass front (Gorilla Glass 3), plastic back, plastic frame | |
| SIM | Micro-SIM | |
| Battery | LG G3 | Oppo A3s |
| Type | Li-Ion 3000 mAh, removable | |
| Charging | Qi wireless charging - optional | |
| Battery capacity | | 4230 mAh, Non-removable Li-Ion |
| Stand-by | Up to 565 h (2G) / Up to 553 h (3G) | |
| Talk time | Up to 19 h (2G) / Up to 21 h (3G) | |
| Other | LG G3 | Oppo A3s |
| Release date | | 2018, July |
| Sensors | | Accelerometer, proximity, compass |
| Features | LG G3 | Oppo A3s |
| Sensors | Accelerometer, gyro, proximity, compass | |
