A91 is a oppo device (codename: A91). FirmwareMirror hosts 9 verified firmware builds, covering: in, au, tw. Available as Fastboot ROM. Last updated: June 2021. All files MD5-verified. Free, no registration.
Find and download official Stock ROM for A91 (A91). All firmware files include MD5 hash verification and are available for direct download.
| Version | Method | Size | Release Date | MD5 Hash | Download |
|---|---|---|---|---|---|
| CPH2021_11_A.39 | Fastboot | 2.64 GB | 2020-08-31 |
N/A
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Download |
| CPH2021_11_A.31 | Fastboot | 2.59 GB | 2020-04-23 |
N/A
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Download |
| CPH2021PUEX_11.C.55 | Fastboot | 3.09 GB | 2021-06-28 |
N/A
|
Download |
| CPH2021PUEX_11_C.43 | Fastboot | 3 GB | 2020-11-06 |
N/A
|
Download |
| CPH2021PUEX_11_C.39 | Fastboot | 3 GB | 2020-09-22 |
N/A
|
Download |
| CPH2001PUEX_11.C.53 | Fastboot | 3.09 GB | 2021-04-16 |
N/A
|
Download |
| CPH2001PUEX_11.C.51 | Fastboot | 3.05 GB | 2021-02-23 |
N/A
|
Download |
| CPH2001PUEX_11.C.47 | Fastboot | 3.02 GB | 2020-12-04 |
N/A
|
Download |
| CPH2001PUEX_11.C.45 | Fastboot | 3.02 GB | 2020-11-14 |
N/A
|
Download |
| Network | Technology | GSM / CDMA / HSPA / LTE |
|---|---|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 | |
| CDMA 800 & TD-SCDMA | ||
| 3G bands | HSDPA 850 / 1700(AWS) / 1900 / 2100 - International | |
| HSDPA 850 / 900 / 2100 - Southeast Asia | ||
| 4G bands | 1, 3, 5, 7, 8, 20, 28, 38, 40, 41 - International | |
| 1, 3, 5, 7, 8, 38, 40, 41 | ||
| 1, 3, 5, 8, 38, 40, 41 - Southeast Asia | ||
| 1, 3, 4, 5, 8, 34, 38, 39, 40, 41 - China | ||
| Speed | HSPA, LTE |
| Launch | Announced | 2019, December 20 |
|---|---|---|
| Status | Available. Released 2019, December |
| Body | Dimensions | 160.2 x 73.3 x 7.9 mm (6.31 x 2.89 x 0.31 in) |
|---|---|---|
| Weight | 172 g (6.07 oz) | |
| Build | Glass front (Gorilla Glass 5), plastic back, plastic frame | |
| SIM | Dual SIM (Nano-SIM, dual stand-by) |
| Display | Type | AMOLED, 430 nits (typ) |
|---|---|---|
| Size | 6.4 inches, 100.4 cm2 (~85.5% screen-to-body ratio) | |
| Resolution | 1080 x 2400 pixels, 20:9 ratio (~408 ppi density) | |
| Protection | Corning Gorilla Glass 5 |
| Platform | OS | Android 9.0 (Pie), upgradable to Android 11, ColorOS 11 |
|---|---|---|
| Chipset | Mediatek MT6771V Helio P70 (12 nm) | |
| CPU | Octa-core (4x2.1 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53) | |
| GPU | Mali-G72 MP3 |
| Memory | Card slot | microSDXC (dedicated slot) |
|---|---|---|
| Internal | 128GB 4GB RAM, 128GB 8GB RAM, 256GB 8GB RAM | |
| UFS 2.1 |
| Main Camera | Quad | 48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.3, 119˚ (ultrawide), 1/4.0", 1.12µm 2 MP B/W, f/2.4, 1/5.0", 1.75µm 2 MP, f/2.4, (depth) |
|---|---|---|
| Features | LED flash, HDR, panorama | |
| Video | 1080p@30fps, gyro-EIS |
| Selfie camera | Single | 16 MP, f/2.0, 26mm (wide), 1/3.06", 1.0µm |
|---|---|---|
| Features | HDR | |
| Video | 1080p@30fps |
| Sound | Loudspeaker | Yes |
|---|---|---|
| 3.5mm jack | Yes |
| Comms | WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct |
|---|---|---|
| Bluetooth | 4.2, A2DP, LE | |
| Positioning | GPS, GLONASS, BDS | |
| NFC | No | |
| Radio | FM radio | |
| USB | USB Type-C 2.0, OTG |
| Features | Sensors | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass |
|---|
| Battery | Type | Li-Po 4025 mAh, non-removable |
|---|---|---|
| Charging | 20W wired, 50% in 30 min (advertised) |
| Misc | Colors | Lightening Black, Unicorn White, Blazing Blue, Red |
|---|---|---|
| Models | PCPM00, CPH2001, CPH2021 | |
| Price | About 200 EUR |
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: A91 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.
