In a smartphone market crowded with incremental upgrades and stylistic tweaks, OPPO’s new F31 5G series stands out for something more fundamental: a design and build quality that pushes mid-range devices toward rugged reliability without compromising everyday performance. Launched with three models, the OPPO F31, F31 Pro and F31 Pro+, this lineup blends thoughtful engineering with materials and features that matter to users who demand durability and longevity.
Redefining durability in the mid-range segment
One of the most compelling aspects of the F31 series is its aerospace-grade AM04 aluminium alloy frame. This material choice isn’t just a buzzword; OPPO claims the frame is about 10 per cent stronger than its predecessor, providing improved rigidity and resistance to wear and tear. Complemented by AGC DT-Star D+ glass for the front and supported by triple IP ratings (IP66, IP68, IP69), the phones are built to resist dust, immersion, and high-pressure water jets, a level of protection typically seen in higher-end devices.
This rugged, all-around armour body makes the F31 series well-suited for users in demanding environments, from outdoor professionals to everyday users who want peace of mind against accidental exposure to liquids or rough handling.
Power and performance where it counts
Beneath the robust exterior, the F31 family delivers respectable performance for its segment. The F31 Pro+ is powered by the Qualcomm Snapdragon 7 Gen 3 chipset, positioning it for smoother multitasking and faster app performance, while the F31 Pro and base F31 run on capable MediaTek Dimensity processors. All models support up to 24GB RAM (12GB physical + 12GB virtual) and include UFS 3.1 storage, ensuring responsive performance and quick data access.
On the software front, ColorOS 15 enhances user experience with smoother interactions, smart performance boosts, and improved responsiveness across daily tasks.
Battery life engineered for real-world use
A standout hardware feature across the series is the 7,000mAh battery, paired with 80W SUPERVOOC fast charging. This combination promises extended use throughout the day and rapid replenishment, letting users return to full power in minimal time, a highly practical benefit for heavy users, travellers, or professionals on the go.
Imaging and AI enhancements
Photography and productivity are also in focus. Each device features a 50MP main camera with optical image stabilisation (OIS), supported by AI-driven tools such as AI Eraser 2.0, AI Unblur, and Reflection Remover, among other features designed to help users capture cleaner, sharper images in various scenarios. Productivity tools like AI VoiceScribe and AI Call Assistant further elevate usability by offering live transcription and multi-language calling support.
What this means for the industry
For a mid-range series, OPPO’s F31 lineup pushes the envelope on durability and functional design. The use of aerospace-grade aluminium not only strengthens the device physically but signals a growing trend where material innovation from other sectors, including aerospace and automotive, is influencing smartphone engineering. In an era where sustainability and longevity are increasingly important to consumers, rugged build quality and practical performance aren’t just nice-to-haves; they’re differentiators.
Final takeaway
The OPPO F31 series isn’t about flashy specs alone. It’s about packaging meaningful performance, industry-inspired materials, and practical features into a solid mid-range device. For users seeking more than average durability and everyday performance without a premium price tag, this series offers a compelling blend of engineering and everyday utility.
Source: Oppo’s F31: Mid-range power meets aerospace-grade aluminium
