Overview

  • Oppo F31 Pro+ 5G is part of Oppo’s new F31 series, marketed as a rugged mid-ranger with very large battery life, durability (IP / MIL-STD), and strong performance. 

  • Nothing Phone 3a Pro 5G is from Nothing’s “3a” line, focusing on design, premium camera features (notably the periscope lens), clean software, and a balance of performance and style. 


Model Variant Price*
Oppo F31 Pro+ 5G 8 GB + 256 GB ~ ₹32,999 
12 GB + 256 GB ~ ₹34,999
Nothing Phone 3a Pro 5G 8 GB + 128 GB ~ ₹27,999 
12 GB + 256 GB ~ ₹31,999 

*Prices are launch or recent street price / official listing as of September 2025; actual deals may vary with offers, bank discounts etc.


Feature Oppo F31 Pro+ 5G Nothing Phone 3a Pro 5G
Materials & Durability Aerospace-grade aluminium alloy frame, rugged build with 360° Armour Body, IP66, IP68, IP69 ratings, MIL-STD-810H certified.  Transparent / translucent design signature of Nothing, glass + plastic build; offers IP64 rating for dust/water protection. 
Display size & refresh rate 6.79-inch AMOLED / 120Hz refresh rate.  ~6.77-inch Flexible AMOLED, also 120Hz. 

Spec Oppo F31 Pro+ 5G Nothing Phone 3a Pro 5G
Chipset / Processor Snapdragon 7 Gen 3 (4 nm)  Snapdragon 7s Gen 3 
RAM / Storage Up to 12 GB RAM + 256 GB storage.  Same / similar options (8 / 12 GB + 128 / 256 GB). 
Cooling / Thermal Vapour chamber cooling; intended to handle high temperatures (heat resistance)  Nothing’s phone also has decent thermal management, though less focus on rugged certifications. 


Aspect Oppo F31 Pro+ 5G Nothing Phone 3a Pro 5G
Rear Cameras Dual setup: • 50 MP main + 2 MP monochrome / depth sensor  Triple setup: • 50 MP main • 50 MP periscope telephoto (3× optical zoom) • 8 MP ultra-wide 
Front Camera 32 MP selfie camera  Big 50 MP front camera 


Spec Oppo F31 Pro+ 5G Nothing Phone 3a Pro 5G
Battery Capacity Massive 7,000 mAh battery. 5,000 mAh battery. 
Fast Charging 80W SUPERVOOC fast charging.  50W wired fast charging. 


Software & Other Features

  • Operating System: Both run Android 15 (one with Oppo’s ColorOS skin) with expected support for updates. 

  • Connectivity: Both support 5G. Oppo F31 Pro+ also emphasizes durability in network performance, and better water/dust resistance. 

  • Extras:

    • Oppo's rugged certifications (IP66/68/69, MIL-STD-810H) make it more durable under harsh conditions. 

    • Nothing Phone 3a Pro’s strengths lie in its camera versatility (especially the periscope zoom), clean design, and software refinement. 

Pros & Trade-Offs

ModelProsTrade-Offs / Weaknesses
Oppo F31 Pro+ 5GHuge battery life; strong durability; good display; fast charging; tough build for outdoors / rugged usage.Bulkier due to large battery; only dual rear cameras; charging speed (80W) is good but some rivals may push limits; camera versatility less than ones with telephoto. Also possibly heavier body. 
Nothing Phone 3a Pro 5GStrong camera setup (especially periscope lens); sleek & stylish design; balanced performance; lighter and more compact than heavy-battery rugged phones.Smaller battery; less durability (lower IP rating); slower charging; less rugged build; possibly less attractive for those who need battery plus toughness. 

Which Should You Pick?

Depends on your priorities. Here are some use-case suggestions:

  • If you travel, work outdoors, or need a phone that can survive harsh conditions and long usage, the Oppo F31 Pro+ 5G is a better choice. That 7,000 mAh battery + strong durability features are big pluses.

  • If you care more about photography versatility, zoom capability, style, and a lighter phone, then the Nothing Phone 3a Pro 5G gives you better value. Its periscope zoom, more premium front camera, and design will please content creators or fashion-conscious users.

  • Also consider cost vs offerings: at similar or slightly lower price bands, Nothing gives you more in camera features; Oppo gives more in battery & durability.

Verdict

Both phones are strong mid-range 5G options in India in late 2025. If I were to pick one for average mixed usage (social media, photos, battery, outdoor use), I’d lean Oppo F31 Pro+ 5G for its bigger battery and rugged credentials. But if my emphasis was on selfies, zoom shots, style, Nothing Phone 3a Pro makes more sense.


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