| Hardware and OS | Kyocera Hydro Xtrm | Oppo A3s |
| Operating system | Android 4.1.2 (Jelly Bean) | Android 8.1 (Oreo); ColorOS 5.1 |
| Processor | Dual-core 1.2 GHz Krait | Octa-core 1.8 GHz Cortex-A53 |
| Chipset | Qualcomm MSM8960 Snapdragon S4 Plus | Qualcomm SDM450 Snapdragon 450 (14 nm) |
| GPU | Adreno 225 | Adreno 506 |
| Internal memory | 4GB 1GB RAM | 16 GB, 2 GB RAM |
| External memory | microSDHC (dedicated slot) | microSD, up to 256 GB (dedicated slot) |
| Display | Kyocera Hydro Xtrm | Oppo A3s |
| Type | IPS LCD capacitive touchscreen | IPS LCD |
| Size | 4.0 inches, 45.5 cm2 | 6.2" inc |
| Resolution | 480 x 800 pixels, 5:3 ratio | 720 x 1520 px |
| Touchscreen | | capacitive touchscreen |
| Protection | Yes | |
| 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 | Kyocera Hydro Xtrm | Oppo A3s |
| Camera | 5 MP, AF | |
| Features | LED flash | |
| Video | Yes | |
| Selfie camera | Kyocera Hydro Xtrm | Oppo A3s |
| Camera | 1.3 MP | |
| Connectivity | Kyocera Hydro Xtrm | Oppo A3s |
| 2G Network | CDMA 800 / 1900 | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 |
| 3G Network | CDMA2000 1xEV-DO | HSDPA 850 / 900 / 2100 |
| 4G Network | LTE band 2(1900), 4(1700/2100), 5(850), 12(700) | 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, EDR, LE | 4.2, A2DP, LE |
| Edge | | Yes |
| Technology | CDMA / EVDO / LTE | |
| GPRS | | Yes |
| GPS | Yes, with A-GPS | Yes, with A-GPS |
| WLAN | Wi-Fi 802.11 b/g/n, hotspot | |
| Speed | LTE Cat3 100/50 Mbps, EV-DO Rev.A 3.1 Mbps | HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps |
| USB | microUSB 2.0 | microUSB 2.0, USB On-The-Go |
| Camera | Kyocera Hydro Xtrm | 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 | Kyocera Hydro Xtrm | Oppo A3s |
| Loudspeaker | Yes | |
| 3.5 mm Jack | Yes | Yes |
| Radio | No | FM radio |
| Design | Kyocera Hydro Xtrm | Oppo A3s |
| Body | IP57 dust/water resistant (up to 1m. and 30 mins)
MIL-STD-810G compliant salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant. | |
| Colors | Black | Red, Dark Purple |
| SIM | Yes, preinstalled | |
| Dimensions | 124 x 64 x 10.7 mm (4.88 x 2.52 x 0.42 in) | 156.2 x 75.6 x 8.2 mm |
| Weight | 139 g (4.90 oz) | 168 g |
| Features | Kyocera Hydro Xtrm | Oppo A3s |
| Sensors | Accelerometer, proximity, compass | |
| Battery | Kyocera Hydro Xtrm | Oppo A3s |
| Capacity | Removable Li-Ion 2000 mAh battery | |
| Stand-by | Up to 408 h | |
| Talk time | Up to 12 h 30 min | |
| Battery capacity | | 4230 mAh, Non-removable Li-Ion |
| Other | Kyocera Hydro Xtrm | Oppo A3s |
| Release date | | 2018, July |
| Sensors | | Accelerometer, proximity, compass |
