OPPO F31 Series to launch on September 15; company reveals what makes F31 Pro+, F31 Pro, & F31 special

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Oppo F31 series: Oppo India is all set to launch its upcoming mid-range smartphone series — the F31 series — in India. The series includes three phones: F31 Pro +, F31 Pro, and F31, which will be launched on Monday, September 15. Designed to operate smoothly even in temperatures as high as 43°C, these devices are built for traders, gig-economy workers, shoppers, and young professionals who require reliable performance, long battery life, and robust durability, according to the company.

What's so special about the Oppo F31 series?

A recent Counterpoint Research survey shows that the most common smartphone issues are overheating (41%), battery problems (32%), and accidental damage (32%).

The Oppo F31 Series addresses these directly with

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enlarged vapour chambers and thermal management to control heat,
a 7,000 mAh battery with 80W SuperVOOC fast charging for all-day power, and
a 360° Armour Body with multi-layer shock absorption and IP69/IP68/IP66 ratings for protection against drops, dust, and water.

Oppo F31 Pro +, F31 Pro, and F31: Performance and thermal design

The F31 Pro+ is powered by Qualcomm’s Snapdragon 7 Gen 3. It uses an octa-core Kryo CPU with a 2.63GHz Cortex-A715 Prime core, three 2.4GHz Cortex-A715 performance cores and four 1.8GHz Cortex-A510 efficiency cores, manufactured on TSMC’s 4 nm process. The phone supports up to 24 GB RAM (12 GB physical + 12 GB virtual) and UFS 3.1 storage. A 5,219 mm² vapour chamber—856 mm² larger than the previous generation—increases thermal dissipation on both sides of the device and slows down heat build-up during sustained workloads.

The F31 Pro runs on MediaTek’s 4nm Dimensity 7300-Energy, an octa-core processor with four 2.5GHz Cortex-A78 cores and four efficiency Cortex-A55 cores. It packs the Mali-G615 MC2 GPU, up to 24GB RAM and UFS 3.1 storage. A 4,363 mm² vapour chamber and expanded graphite sheets improve heat dissipation during long sessions.

The F31 runs the 6nm Dimensity 6300 SoC with two 2.4GHz Cortex-A76 cores and six 2GHz Cortex-A55 cores, paired with the Mali-G57 MC2 GPU. It uses a 4,300 mm² vapour chamber with extended graphite coverage that improves thermal efficiency by 21% over the previous generation.

Oppo F31 Pro +, F31 Pro, and F31: Software

All three phones run ColorOS 15 with OPPO’s Dual-Engine Smoothness System that combines the Trinity Engine and the Luminous Rendering Engine.

OPPO F31 Series: AI features

The F31 Series will host a lot of AI tools, including:

AI VoiceScribe: It records meetings or calls, adding real-time translation, subtitles and summaries in over 29 languages including Hindi, English, Kannada, Marathi, Gujarati, Tamil, Malayalam, Telugu, Punjabi, Bengali, Chinese, Spanish and others.
AI Call Assistant: It translates both sides of calls in real time using Google’s Gemini model, with subtitles or text-to-speech output.
OPPO Docs: It applies AI-generated content tools to summarise, translate or rewrite documents.
AI Assistant for Notes: The AI Assistant for Notes restructures unorganised text, corrects errors, expands or shortens drafts, and adjusts tone across languages.
Scan Document tool: A Scan Document tool turns images into editable text with perspective correction and PDF export.

OPPO F31 Series: Camera systems

The F31 Pro+ will feature a 32MP front camera and a rear camera with a 50MP main camera, paired with a 2MP monochrome sensor with two-axis OIS. The F31 has a 50MP main sensor and two 2MP portrait lenses, along with a 16MP front camera (IMX480 sensor).

OPPO F31 Series: Battery and charging

Both models of this series will be equipped with a 7000mAh battery. The company said that with 80W SuperVOOC, the battery gets charged 58 percent in 30 minutes and gets fully charged in less than an hour. Wired reverse charging will also be available which will turn the phone into a power bank.