Nothing Phone (3a) Pro vs OnePlus 15T

Nothing Phone (3a) Pro

A 6.77-inch 120Hz AMOLED that's a genuine class leader — bright enough that outdoor use is never a squint.

• The 6.77-inch FHD+ AMOLED at 120Hz peaks at an eye-searing 3,000 nits, among the brightest displays in its class.
• It hits ~700 nits typical and up to 1,300 nits for HDR, an always-on display and 120Hz — brighter than the company's last phone.
• Independent measurement put real-world brightness at ~700 nits SDR / ~1,550–1,600 nits HDR despite the 3,000-nit headline — still very usable.
• HDR content looks excellent — specular highlights really stand out thanks to the 3,000-nit peak — and outdoor use is never a squinting exercise.

OnePlus 15T

The 6.32-inch 165 Hz 1.5K AMOLED panel is the only true 165 Hz compact-flagship display on the market and pairs that refresh rate with a measured 1,800 nits brightness, 460 ppi pixel density, Crystal Shield Glass, and HDR10+/Dolby Vision support. Native 165 Hz support in popular FPS games is a real differentiator. Notebookcheck flags 120.7 Hz PWM dimming that can cause eyestrain for sensitive users.

• The 6.32-inch 165 Hz AMOLED panel achieves a very good 460 ppi pixel density and the advertised maximum brightness of 1,800 nits in standard measurement.
• Display sharpness is plenty competent — sharp, smooth, and easily one of the strongest spec sheets you can get on a compact phone.
• Native 165 Hz support in COD, Delta Force and Peacekeeper Elite makes this the only small-screen flagship pushing a full 165 Hz gaming experience.
• OnePlus claims up to 3,600 nits peak brightness — even on a playground in direct sunlight you can still see everything clearly, no squinting required.
• Specifications confirm a 6.32-inch 1.5K (1216 × 2640) resolution with 165 Hz refresh — a configuration unique to the 15T in the compact class.
• Display backlight flickers at just 120.7 Hz under PWM dimming — low enough that the flickering may cause eyestrain and headaches for sensitive users after extended use.

Nothing Phone (3a) Pro

The Snapdragon 7s Gen 3 is upper-mid — smooth daily and well thermally managed, but raw benchmarks are weak and demanding games drop frames.

• It runs a 4nm Snapdragon 7s Gen 3 with up to 12GB RAM (plus virtual RAM) and 256GB UFS 2.2 storage.
• Even under prolonged stress testing the chipset loses very little performance, with excellent thermal-throttling behaviour and no major dips.
• Nothing claims it's 33% faster in CPU, 11% in GPU and 92% better at AI tasks than the Phone 2a — ~40% better CPU / ~90% better GPU than the two-year-old Phone 2.
• Gaming holds 120fps in BGMI and 90fps in Call of Duty, but heavier titles like Asphalt run at 60fps with missing visual effects and drop to ~30–35fps in action.
• You can find ways to get the phone stuttering when moving through heavy apps or gaming, but the performance still can't be faulted for the price.
• Raw Geekbench is weak — against the Galaxy A56 the A56 wins overall (CPU/GPU/UX), with the Nothing only ahead on memory.

OnePlus 15T

Snapdragon 8 Elite Gen 5 paired with 12-16GB LPDDR5X Ultra Pro RAM delivers flagship synthetic scores — Notebookcheck recorded Geekbench multi-core 10,976 and 3DMark Wild Life Unlimited 29,901, on par with the larger Xiaomi 17 and Honor Magic8 Pro Air. The problem is sustained: in the 3DMark Wild Life stress test the GPU drops over 50% and the back of the phone hits 50 °C, which both Notebookcheck and SuperSaf flag as a deal-breaker for long gaming sessions.

• Geekbench 6 multi-core hits 10,976 — flagship-tier and within 1% of the average 8 Elite Gen 5 result, so there is no compromise on the chipset versus larger phones.
• 3DMark Wild Life Unlimited hits 29,901 — 5% above the 8 Elite Gen 5 average and ahead of the Xiaomi 17 with the same chip.
• In the 3DMark stress tests the OnePlus 15T shows a sharp drop in performance of over 50%, which significantly lowers our rating.
• Wildlife Extreme stress test scores swung from 6,990 best loop to 3,743 worst loop in a single run — the chart is 'quite a bit of a bumpy ride' and performance mode did nothing to stabilize it.
• Surface temperatures hit 48.3 °C on the back during stress testing and continued climbing to 50 °C near the camera bump — about 45 °C internal — which seems to be the phone's thermal limit.

Nothing Phone (3a) Pro

A 5,000mAh cell that's exceptionally well optimised — a day and a half of use that out-endures the Pixel 9a — with fast 50W wired charging, but no wireless charging.

• In an extreme multi-task drain test the 3a Pro lasted 9h08m, beating the Pixel 9a's 7h30m — a great improvement showing how well Nothing has optimised it.
• In regular medium-to-heavy use you can expect about 7–8 hours of screen-on time, and a day and a half with moderate use.
• 50W wired charging fully replenishes the 5,000mAh battery from zero in about 56 minutes (50% in under 20 minutes).
• At 5,000mAh it's starting to look modest against newer 6,000–7,000mAh rivals, but it's far from bad.
• There's no wireless charging and no reverse charging — and no charger in the box.
• Long-term battery health holds up unusually well — one owner reported it still at 100% after a year, a first for them.

OnePlus 15T

This is the section the OnePlus 15T was built to win. The 7,500 mAh silicon-carbon 'Glacier' cell is the largest ever fitted to a true compact phone — 50% bigger than the iPhone 17's pack in a similar footprint. Notebookcheck measured roughly 1.5 days of real-world endurance at 150 cd/m². Wired charging tops out at 100 W, wireless at 50 W. The only friction points are the missing built-in magnets for MagSafe-style alignment and the still-USB-2.0 port.

• OnePlus relies on a silicon-carbon-based battery with a large capacity of 7,500 mAh for its mini flagship — in our practical battery test at 150 cd/m² brightness, the 15T achieved an excellent battery life of nearly 1.5 days.
• 9to5Google's preview confirms the 7,500 mAh cell carries the same 'Glacier' moniker as the OnePlus 15's battery, so the silicon-carbon structure is here too — 200 mAh more than the larger sibling.
• Even though the phone keeps the same compact size, it now packs a massive 7,500 mAh battery — to put that into perspective, the iPhone 17 Pro Max only has around 5,000 mAh, and this is a 6.32-inch phone.
• Battery life is wild for a phone this size and is actually a hair bigger than the one in the OnePlus 15, which has a noticeably larger footprint.

Nothing Phone (3a) Pro

Nothing OS is the phone's quiet superpower — one of the cleanest Android experiences outside a Pixel with strong support — but the Essential Key underwhelms and the Glyph still feels unfinished.

• Nothing OS is one of the best ways to experience Android — Pixel-clean but even more minimalist.
• Nothing promises 3 years of OS updates and 6 years of security patches (some now report OS support extended to 4 years) — reasonable for the price.
• Essential Space is the best use of on-device AI seen outside Google and Samsung — capture a rambling monologue and it saves the details accurately.
• Even months in, the Essential Key still isn't very useful — and the rumoured ~$120/year Essential Space cost is unwelcome.
• Nothing has begun diluting what makes it special — lock-screen ads and pre-installed bloatware are being added across the lineup.

OnePlus 15T

The OnePlus 15T ships with ColorOS 16 on Android 16 in China rather than the global OxygenOS, though the two skins are now nearly identical in feel. Update commitments are unclear — OnePlus doesn't publish a timeline for Chinese-market hardware, and even the global OnePlus 15 only commits to 4 years of major Android upgrades. Mind Space (AI-powered productivity vault) and Gemini integration are the headline software features.

• ColorOS 16 comes pre-installed on the 15T instead of OxygenOS — but the differences are minor overall, with German language and Android Auto supported, though no WearOS watches or eSIMs.
• There are question marks over the duration of the updates provided — the manufacturer does not usually provide any information on this for China, though typically a OnePlus 15-class phone should receive security updates for six years.
• OxygenOS 16 (and ColorOS 16 by extension) integrates Gemini with Mind Space — you can ask Gemini about any saved memory and it accesses local content to perform tasks, making it the best on-phone AI integration we have seen.
• Mind Space is the headline AI feature — a digital vault that takes a screenshot of important content and saves it as a card with URL, summary, title and hashtags for contextual search.