Oppo F31 Pro 5G

The Oppo F31 Pro 5G has a standard, non-folding form factor measuring 158.2 mm tall, 75 mm wide, and just 8 mm thick, with a total volume of 94.92 cm³ and a weight of 190 g. It carries an IP68 rating, confirming full waterproof protection at depths of up to 1.5 m, though it does not feature a rugged build construction.

The Oppo F31 Pro 5G features a 6.57″ OLED/AMOLED touchscreen with a resolution of 1080 x 2372 px and a pixel density of 397 ppi, producing a sharp and detailed image. The panel runs at a 120Hz refresh rate with a 240Hz touch sampling rate, and reaches a typical brightness of 600 nits, while branded damage-resistant glass adds a layer of surface protection. The display does not support HDR10, HDR10+, or Dolby Vision, and there is no secondary screen.

The Oppo F31 Pro 5G is powered by the MediaTek Dimensity 7300 chipset, built on a 4 nm process with 6,200 million transistors, and paired with 12GB of DDR5 RAM running at 6,400 MHz — expandable up to a maximum of 16GB. The octa-core CPU runs at 4 x 2.5 GHz and 4 x 2 GHz using big.LITTLE architecture with Heterogeneous Multi-Processing, across 8 threads, and scores 1,026 single-core and 2,932 multi-core on Geekbench 6. Graphics are handled by the integrated Mali G615 MC2 GPU clocked at 1,047 MHz with DirectX 12 support, driving a single display output, while the SoC also includes integrated LTE and full 64-bit support. Internal storage stands at 256GB, with no external memory slot available.

The Oppo F31 Pro 5G uses a dual-lens rear camera system combining a 50 MP main sensor at f/1.8 and a 2 MP secondary lens at f/2.4, both using a CMOS sensor without back-side illumination. The main camera supports optical image stabilization, phase-detection autofocus, touch autofocus, and continuous autofocus during video, though laser autofocus is not present. Video capture reaches up to 2160p at 30 fps, with slow-motion recording supported, while HDR10 and Dolby Vision recording are not available. Manual controls cover exposure, ISO, focus, and white balance, but manual shutter speed and RAW capture are absent; additional shooting modes include burst, panorama, and timelapse. A single LED flash is fitted at the rear — not dual-tone or RGB — and there is no front-facing flash. The 32 MP front camera sits at f/2.4 as a single lens, is not positioned under the display, and lacks 3D or 360-degree capture capabilities.

The Oppo F31 Pro 5G runs Android 15, an open-source platform that supports multi-user profiles, offline voice recognition, voice commands, on-device machine learning, and device tracking. Privacy controls are well covered, including clipboard warnings, location privacy options, camera and microphone access management, and the ability to block app tracking, though cross-site tracking blocking and Mail Privacy Protection are not included. On the usability side, the OS offers dynamic theming, theme customization, dark mode, an extra dim mode, customizable notifications with notification permission controls, a media picker, Live Text, full-page screenshots, split-screen multitasking, Picture-in-Picture, sharing intents, widgets, app offloading, a child lock, and the ability to play games while they are still downloading. A battery health check tool is also present. Wi-Fi password sharing, focus modes, Quick Start, and PC mode are not supported, and OS updates are not delivered directly from the vendor.

The Oppo F31 Pro 5G houses a 7000 mAh rechargeable, non-removable battery with a battery level indicator built in. It supports 80W fast charging and comes with a charger included in the box, though wireless charging and reverse wireless charging are not available.

The Oppo F31 Pro 5G features stereo speakers and supports aptX, aptX HD, and LDAC Bluetooth audio codecs for higher-quality wireless playback, though aptX Adaptive and aptX Lossless are not supported. There is no 3.5 mm headphone jack and no built-in radio.

The Oppo F31 Pro 5G supports 5G connectivity alongside a dual SIM slot, Wi-Fi 4, 5, and 6, and Bluetooth 5.4, with download and upload speeds each reaching 3,270 Mbit/s. It uses a USB Type-C port running USB 2.0, and includes NFC, a fingerprint scanner, GPS with Galileo support, a compass, gyroscope, accelerometer, and an infrared sensor. There is no external memory slot, no HDMI output, and no ANT+ support, while crash detection, satellite SOS, a barometer, heart rate monitor, DLNA certification, 3D facial recognition, iris scanner, motion or optical tracking, and a built-in projector are all absent. No stylus is included with the device.

The Oppo F31 Pro 5G includes a video light for illumination during video recording, while its display is flat rather than curved and uses neither sapphire glass nor an e-paper panel.