Oppo A91 The Oppo A91 is a balanced everyday device, powered by the Mediatek MT6771V Helio P70 (12 nm), suited to light-to-moderate use, with a 4,025 mAh battery for solid all-day use (2019).
2019 · Mid-range · Android 9.0 (Pie) ⓘ Grades compare this device against others in its own market segment (Mid-range), not against every device on the site.
⚡ Quick Specs
Size 6.4" · 160.2 x 73.3 x 7.9 mm (6.31 x 2.89 x 0.31 in)
Chipset Mediatek MT6771V Helio P70 (12 nm)
RAM 4GB | 8GB
Storage 128GB | 256GB
Main Camera 48 MP · LED flash
⚖️ Compare With
Oppo A91 vs Oppo A9 (2020) Oppo A91 vs Oppo F15 Oppo A91 vs Oppo Reno Oppo A91 vs Oppo Reno2 F Oppo A91 vs Oppo Reno3 Oppo A91 vs Oppo A72
✓︎ Pros
✓ Sharp 408 PPI screen
✓ 6.4" OLED/AMOLED display with deep blacks and vibrant colours
✓ 3.5mm headphone jack for wired audio without adapters
⊗ Cons
✗ Entry-level Mediatek MT6771V Helio P70 (12 nm) — struggles with demanding apps
⚠️ Not ideal for
Mobile gaming Heavy multitasking
ℹ️ Overview
Announced
2019, December 20. Released 2019, December
Also Known As
Versions: CPH2001, CPH2021 (International); PCPM00 (China)
⚙️ Performance
Chipset
Mediatek MT6771V Helio P70 (12 nm)
Mid-range — handles daily tasks well
CPU
Octa-core (4x2.1 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53)
OS
Android 9.0 (Pie), upgradable to Android 11, ColorOS 11
RAM
4GB | 8GB
Fine for everyday apps
💻 Display
Sharpness
408 ppi
Sharp and comfortable to read
Panel
AMOLED, 430 nits (typ)
OLED: perfect blacks, vivid colours, power-efficient
📷 Camera
Main Camera
48 MP
Good detail in daylight conditions
🔋 Battery
Capacity
4,025 mAh
Adequate for moderate use
Type
Li-Po 4025 mAh, non-removable
📱 Design & Build
Weight
172g
Balanced size and weight
Dimensions
160.2 x 73.3 x 7.9 mm (6.31 x 2.89 x 0.31 in)
Build
Glass front (Gorilla Glass 5), plastic back, plastic frame
Colors
Lightening Black, Unicorn White, Blazing Blue, Red
Sensors
Fingerprint (under display, optical), accelerometer, gyro, proximity, compass
📶 Network
2G Bands
GSM 850 / 900 / 1800 / 1900
3G Bands
HSDPA 850 / 1700(AWS) / 1900 / 2100 - International
📡 Connectivity
WiFi
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
❓ Frequently Asked Questions
Does the Oppo A91 support 5G?› No, the Oppo A91 does not support 5G — it supports GSM / CDMA / HSPA / LTE.
Does the Oppo A91 have NFC?› No, the Oppo A91 does not have NFC.
Does the Oppo A91 support wireless charging?› No, the Oppo A91 charges via cable only — no wireless charging.
Does the Oppo A91 support fast charging?› Yes, up to 20W (20W wired, 50% in 30 min).
Does the Oppo A91 have expandable storage?› Yes, the Oppo A91 supports microSDXC expandable storage.
Does the Oppo A91 support dual SIM?› The Oppo A91 SIM configuration: Nano-SIM + Nano-SIM.
Does the Oppo A91 have a headphone jack?› Yes, the Oppo A91 has a 3.5mm headphone jack.
Does the Oppo A91 have stereo speakers?› Speaker setup: Yes.
What Android version does the Oppo A91 ship with?› The Oppo A91 ships with Android 9.0 (Pie), upgradable to Android 11, ColorOS 11.
What type of USB port does the Oppo A91 use?› The Oppo A91 uses USB Type-C 2.0, OTG.
Does the Oppo A91 support Wi-Fi 7?› The Oppo A91 supports Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct.
Does the Oppo A91 support Bluetooth LE Audio?› The Oppo A91 has 4.2, A2DP, LE.
