| Micromax Bolt A66 |
Oppo A3s |
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| Hardware and OS | Micromax Bolt A66 | Oppo A3s |
| Operating system | Android v4.1.2 (Jelly Bean) | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | Single core, 1 GHz | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | Spreadtrum SC7710G | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | Adreno 506 | |
| RAM | 512 MB | |
| Internal memory | 512 MB | 16 GB, 2 GB RAM |
| External memory | microSD, up to 256 GB (dedicated slot) | |
| Expandable Memory | yes Up to 32 GB | |
| SIM Slot(s) | Dual SIM, GSM GSM | |
| Display | Micromax Bolt A66 | Oppo A3s |
| Type | IPS LCD | |
| Size | 6.2" inc | |
| Screen Size | 4.5 inches (11.43 cm) | |
| Resolution | 720 x 1520 px | |
| Screen Resolution | 480 x 854 pixels | |
| Touchscreen | capacitive touchscreen | |
| Display Type | LCD | |
| Screen-to-Body Ratio | 81.2% | |
| Display area | 95.9 cm2 | |
| Touch Screen | yes Capacitive Touchscreen, Multi-touch | |
| Display aspect ratio | 19:9 (height:width) | |
| Pixel Density | 218 ppi | 271 PPI |
| Colors | 16M | |
| Main Camera | Micromax Bolt A66 | Oppo A3s |
| Resolution | 2 MP Primary Camera | |
| Image Resolution | 1600 x 1200 Pixels | |
| Flash | yes LED Flash | |
| Camera Features | Digital Zoom | |
| Connectivity | Micromax Bolt A66 | Oppo A3s |
| 2G Network | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | |
| 3G Network | HSDPA 850 / 900 / 2100 | |
| 4G Network | LTE | |
| Wi-Fi | yes Wi-Fi 802.11 | Wi-Fi 802.11 b/g/n, WiFi Direct, hotspot |
| Network | 4G: Not Available, 3G: Available, 2G: Available | GSM / HSPA / LTE |
| SIM card | Dual SIM (Nano-SIM, dual stand-by) | |
| SIM 1 | 3G Bands: UMTS 2100 MHz 2G Bands: GSM 1800 / 900 MHz 3G Speed: HSDPA 7.2 Mbit/s ↓, HSUPA 5.76 Mbit/s ↑ GPRS: Available EDGE: Available | |
| Bluetooth | yes v2.1 | 4.2, A2DP, LE |
| SIM 2 | 2G Bands: GSM 1800 / 900 MHz | |
| Edge | Yes | |
| GPRS | Yes | |
| GPS | Yes, with A-GPS | |
| Wi-Fi Features | Mobile Hotspot | |
| Speed | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps | |
| USB Connectivity | microUSB | |
| USB | microUSB 2.0, USB On-The-Go | |
| Front Camera | Micromax Bolt A66 | Oppo A3s |
| Resolution | 0.3 MP Primary Camera | |
| Camera | Micromax Bolt A66 | 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 | Micromax Bolt A66 | Oppo A3s |
| Audio Jack | 3.5 mm | |
| FM Radio | yes | |
| Loudspeaker | yes | |
| 3.5 mm Jack | Yes | |
| Radio | FM radio | |
| Design | Micromax Bolt A66 | Oppo A3s |
| Height | 138 mm | |
| Width | 68 mm | |
| Thickness | 11 mm | |
| Colours | White | |
| Colors | Red, Dark Purple | |
| Dimensions | 156.2 x 75.6 x 8.2 mm | |
| Weight | 93 grams | 168 g |
| Battery | Micromax Bolt A66 | Oppo A3s |
| Type | Li-ion | |
| Capacity | 1500 mAh | |
| Standby time | Up to 116 Hours(2G) | |
| TalkTime | Up to 4.5 Hours(2G) | |
| Battery capacity | 4230 mAh, Non-removable Li-Ion | |
| Features | Micromax Bolt A66 | Oppo A3s |
| Applications | Spuul, Hike, Opera, Milive, Game hub, etc. | |
| Other Sensors | Accelerometer | |
| Other | Micromax Bolt A66 | Oppo A3s |
| Release date | 2018, July | |
| Sensors | Accelerometer, proximity, compass |
