| Hardware and OS | BLU G40 | Oppo A3s |
| Operating system | Android 11 (Go Edition) | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | Quad-core (1x2.0 GHz Cortex-A75 & 3x1.8 GHz Cortex-A55) | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | UNISOC Tiger T310 (12 nm) | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | PowerVR GE8300 | Adreno 506 |
| RAM | 3GB 32GB | |
| Internal memory | | 16 GB, 2 GB RAM |
| Memory Card Slot | Yes, up to 128GB via microSD card | |
| External memory | | microSD, up to 256 GB (dedicated slot) |
| Display | BLU G40 | Oppo A3s |
| Type | IPS LCD touchscreen / 16M colors | IPS LCD |
| Size | 6.0 inches, (75.2% screen-to-body ratio) | 6.2" inc |
| Resolution | 720 x 1440 pixels, 18:9 ratio | 720 x 1520 px |
| Touchscreen | | capacitive touchscreen |
| Screen-to-Body Ratio | | 81.2% |
| Display area | | 95.9 cm2 |
| Display aspect ratio | | 19:9 (height:width) |
| Pixel Density | | 271 PPI |
| Colors | | 16M |
| Connectivity | BLU G40 | Oppo A3s |
| Technology | GSM / HSPA / LTE | |
| 2G Network | GSM 850/900/1800/1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | HSDPA Bands 850 / 900 / 1700 / 1900 / 2100 | HSDPA 850 / 900 / 2100 |
| NFC | No | |
| 4G Network | LTE band B2 / B3 / B4 / B5 / B7 / B12 / B17 / B28 / B66 | LTE |
| Wi-Fi | Wi-Fi 802.11 a/b/g, Wi-Fi Direct, hotspot | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot |
| Network | | GSM / HSPA / LTE |
| SIM card | | Dual SIM (Nano-SIM, dual stand-by) |
| Bluetooth | Bluetooth 4.2, A2DP | 4.2, A2DP, LE |
| Edge | | Yes |
| GPRS | | Yes |
| GPS | Yes, with A-GPS, GLONASS | Yes, with A-GPS |
| Speed | HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| USB | Micro USB 2.0 | microUSB 2.0, USB On-The-Go |
| Camera | BLU G40 | Oppo A3s |
| Camera Features | Autofocus / HDR / LED flash | |
| Camera Type | Double Lenses | |
| Video Recording | 1080p@30fps | |
| Video Resolution | 1080p@30fps | |
| Main camera | Main: 13 MP, PDAF
Depth: QVGA AI lens | 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-megapixel front camera | 8 MP, Single |
| Multimedia | BLU G40 | Oppo A3s |
| Headphone jack | Yes, 3.5mm audio jack | |
| Loudspeaker | Yes | |
| 3.5 mm Jack | | Yes |
| Radio | | FM radio |
| Design | BLU G40 | Oppo A3s |
| Body build | Plastic | |
| SIM | Dual SIM (Nano-SIM, dual stand-by) | |
| Colors | | Red, Dark Purple |
| Dimensions | 163.4 x 78.8 x 10.75 mm | 156.2 x 75.6 x 8.2 mm |
| Weight | 205 grams | 168 g |
| Other features | BLU G40 | Oppo A3s |
| Colors | Black, Silver, Blue, Gold and Green | |
| Sensors | Fingerprint (rear-mounted), accelerometer, proximity | |
| Battery | BLU G40 | Oppo A3s |
| Capacity | Non-removable Li-Pol 3000mAh battery | |
| Battery capacity | | 4230 mAh, Non-removable Li-Ion |
| Other | BLU G40 | Oppo A3s |
| Release date | | 2018, July |
| Sensors | | Accelerometer, proximity, compass |
