A3s(CPH1853) is a oppo device (codename: A3s(CPH1853)). FirmwareMirror hosts 6 verified firmware builds, covering: in. Available as Fastboot ROM. Last updated: January 2021. All files MD5-verified. Free, no registration.
Find and download official Stock ROM for A3s(CPH1853) (A3s(CPH1853)). All firmware files include MD5 hash verification and are available for direct download.
| Version | Method | Size | Release Date | MD5 Hash | Download |
|---|---|---|---|---|---|
| CPH1853_11_A.31 | Fastboot | 2.01 GB | 2020-03-25 |
N/A
|
Download |
| CPH1853EX_11_A.39 | Fastboot | 2.03 GB | 2021-01-12 |
N/A
|
Download |
| CPH1853EX_11_A.38 | Fastboot | 2.02 GB | 2020-12-31 |
N/A
|
Download |
| CPH1853EX_11_A.37 | Fastboot | 2.01 GB | 2020-08-25 |
N/A
|
Download |
| CPH1853EX_11_A.36 | Fastboot | 2.01 GB | 2020-07-17 |
N/A
|
Download |
| CPH1853EX_11_A.28 | Fastboot | 2.01 GB | 2019-12-15 |
N/A
|
Download |
| Network | Technology | GSM / HSPA / LTE |
|---|---|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | |
| 3G bands | HSDPA 850 / 900 / 2100 | |
| 4G bands | 1, 3, 5, 8, 38, 40, 41 | |
| Speed | HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps |
| Launch | Announced | 2018, July 13 |
|---|---|---|
| Status | Available. Released 2018, July |
| Body | Dimensions | 156.2 x 75.6 x 8.2 mm (6.15 x 2.98 x 0.32 in) |
|---|---|---|
| Weight | 168 g (5.93 oz) | |
| Build | Glass front (Gorilla Glass 3), plastic back, plastic frame | |
| SIM | Dual SIM (Nano-SIM, dual stand-by) |
| Display | Type | IPS LCD |
|---|---|---|
| Size | 6.2 inches, 95.9 cm2 (~81.2% screen-to-body ratio) | |
| Resolution | 720 x 1520 pixels, 19:9 ratio (~271 ppi density) | |
| Protection | Corning Gorilla Glass 3 |
| Platform | OS | Android 8.1 (Oreo), ColorOS 5.1 |
|---|---|---|
| Chipset | Qualcomm SDM450 Snapdragon 450 (14 nm) | |
| CPU | Octa-core 1.8 GHz Cortex-A53 | |
| GPU | Adreno 506 |
| Memory | Card slot | microSDXC (dedicated slot) |
|---|---|---|
| Internal | 16GB 2GB RAM, 32GB 3GB RAM, 64GB 4GB RAM | |
| eMMC 5.1 |
| Main Camera | Dual | 13 MP, f/2.2, AF 2 MP, f/2.4, (depth) |
|---|---|---|
| Features | LED flash, HDR, panorama | |
| Video | 1080p@30fps |
| Selfie camera | Single | 8 MP, f/2.2 |
|---|---|---|
| Video | 1080p@30fps |
| Sound | Loudspeaker | Yes |
|---|---|---|
| 3.5mm jack | Yes |
| Comms | WLAN | Wi-Fi 802.11 b/g/n, Wi-Fi Direct |
|---|---|---|
| Bluetooth | 4.2, A2DP, LE | |
| Positioning | GPS | |
| NFC | No | |
| Radio | FM radio | |
| USB | microUSB 2.0, OTG |
| Features | Sensors | Accelerometer, gyro, proximity, compass |
|---|
| Battery | Type | Li-Ion 4230 mAh, non-removable |
|---|---|---|
| Charging | 20W wired |
| Misc | Colors | Red, Dark Purple |
|---|---|---|
| Models | CPH1803, CPH1853, CPH1805 | |
| Price | About 11000 INR |
A: Yes — official firmware from the manufacturer is generally safe when you match your device's exact model number and region. Flashing the wrong region or modified firmware can cause issues.
A: A3s(CPH1853) firmware is flashed using MSMDownloadTool. See the step-by-step guide above for the full procedure.
A: Some devices allow downgrading, others have anti-rollback protection that blocks it. Check the version-specific notes on each ROM page, or your model's community forum, before attempting a downgrade.
A: First, verify the firmware matches your exact model code (e.g. SM-S938B for Samsung, or the CPH-number for OPPO). Reinstall the manufacturer's USB drivers, use a rear USB 2.0 port directly on your PC, and retry. The troubleshooting box above the FAQ covers the most common failure modes.
