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At launch, the OPPO F31 5G cost ₹5,000 more than the OPPO K13 5G at either matched storage tier in India. Both offer 7,000mAh-class batteries and up to 80W SUPERVOOC charging; the clearest stated differences are their processors, display sizes and launch prices. Those launch figures are not current prices, and the available specifications do not establish a universal winner.
OPPO K13 vs OPPO F31: key specifications
This is a comparison of the base OPPO K13 5G and base OPPO F31 5G sold in India—not the F31 Pro or F31 Pro+. OPPO identifies the F31 5G as model CPH2781.
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| Specification | OPPO K13 5G | OPPO F31 5G |
|---|---|---|
| Processor | Qualcomm Snapdragon 6 Gen 4 | MediaTek Dimensity 6300 |
| Display | 6.67-inch FHD+ AMOLED, 1080 × 2400, 120Hz | 6.57-inch FHD+ AMOLED, 1080 × 2372, 120Hz; dimensions and resolution are listed by a third-party comparison page |
| Battery | 7,000mAh; graphite battery, according to OPPO’s announcement | 7,000mAh typical; 6,830mAh rated |
| Wired charging | 80W SUPERVOOC | Up to 80W SUPERVOOC |
| Listed RAM and storage | 8GB/128GB; 8GB/256GB | 8GB/128GB; 8GB/256GB |
The K13’s display details and core specifications are in OPPO’s K13 launch announcement. The F31’s battery and processor figures are listed on OPPO’s F31 5G specifications page. The F31 display figures above come from a third-party comparison listing, rather than the official specifications page.
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How much more did the F31 cost at launch?
OPPO announced the K13 in April 2025 and the F31 series in September 2025. Comparing the same storage tier, the F31’s announced launch price was ₹5,000 higher in both cases.
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| Matched configuration | K13 launch price | F31 launch price | F31 launch-price difference |
|---|---|---|---|
| 8GB/128GB | ₹17,999 | ₹22,999 | ₹5,000 more |
| 8GB/256GB | ₹19,999 | ₹24,999 | ₹5,000 more |
These are announced launch prices, not verified prices today. Check the price for the same storage variant at checkout before deciding; retailer listings and offers can change. OPPO’s launch details are in its K13 announcement and F31 series announcement.
Which phone has the better display?
On the listed specifications, both have FHD+ AMOLED displays with a 120Hz refresh rate. The K13 has the larger stated screen at 6.67 inches, compared with 6.57 inches for the F31. Their listed resolutions differ slightly, too: 1080 × 2400 for the K13 and 1080 × 2372 for the F31. The F31 dimensions and resolution are from a third-party listing, so confirm them against the exact handset’s official specifications before treating that small difference as decisive.
Rank #2
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Refresh rate and panel type do not establish which screen looks better in person. The information available here does not provide a controlled brightness, colour-accuracy or outdoor-visibility comparison.
Are battery and charging different?
Both phones are advertised with 7,000mAh-class batteries and 80W charging. OPPO lists the F31 at 7,000mAh typical capacity and 6,830mAh rated capacity; the K13 announcement describes its battery as 7,000mAh. Battery capacity alone does not predict how long either phone lasts between charges, and the charging claims are not a measured head-to-head charging-time result.
Rank #3
- Wonderful Design - designed case for Oppo K12S 5G / Oppo K13 5G High-quality synthetic leather with soft TPU upholstery for a very comfortable feel
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- Wallet designCard slot designShell is available in a variety of coloursThe inside of the shell is made of PU leather + TPU material, which will not scratch the phone
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Does the processor make one phone faster?
The K13 uses Qualcomm’s Snapdragon 6 Gen 4, while the F31 uses MediaTek’s Dimensity 6300, according to OPPO. Chipset names are not a substitute for a controlled comparison: no independent benchmark results or sustained-use tests were established for these two phones. For gaming, demanding apps or long sessions, look for tests of the exact India models and your intended workload rather than choosing solely by processor branding.
What about durability and software support?
OPPO promoted the F31 series with IP66, IP68 and IP69 certifications. That is a series-level statement; confirm the certification details for the base F31 5G and the conditions covered before relying on it. The F31 product page also promotes a “72-month fluency certification.” Treat this as OPPO’s certification claim, not a promise that every owner’s phone will perform identically for six years.
Rank #4
- Perfect Fit for Phone Case Compatible with Oppo K13 5G, Premium 2-in-1 hybrid structure with flexible TPU frame and hard matte back panel, precise cutouts for all buttons and ports.
- 1.5mm Raised camera and screen lips form effective buffer barrier, stop direct scratch and friction for your lens and display.
- Military grade shockproof design with built-in corner airbags, high elastic frame absorbs impact for daily accidental drops and bumps.
- Made with flexible TPU material, the case offers enhanced elasticity and impact resistance for everyday protection. The reinforced bumper design helps absorb shock from accidental drops and bumps while maintaining a slim profile.
- Ultra thin skin-friendly lightweight design, keeps original phone hand feel without bulky experience, comfortable daily grip.
OPPO’s K13 launch announcement states two years of OS updates and three years of security updates. Check the support terms that apply to the handset and region you are buying; the available F31 information does not establish a directly comparable update commitment.
Which should you buy: OPPO K13 or OPPO F31?
- Consider the K13 if its current price is lower for your chosen storage tier and you want the larger stated display. Its launch price was ₹5,000 below the F31 at both matched configurations.
- Consider the F31 if its current price and any model-specific durability details suit your needs. Its higher launch price alone does not prove that it is more durable or faster in everyday use.
- For either phone, compare the current checkout price, confirm the exact model and storage, and look for independent tests relevant to your priorities. Both list 7,000mAh-class battery capacity and up to 80W charging.
The evidence supports a clear launch-price comparison, but not a universal performance, battery-life or camera winner.
Quick Recap
Best Value
- Phone Case Compatible with Oppo K13 Turbo 5G
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
