Nothing Phone (3a) vs Xiaomi 15 Ultra

Nothing Phone (3a)

The standout feature — a triple camera system with 50MP telephoto at $349 that no budget competitor can match.

• A 50MP telephoto with 2x optical zoom at $349 is unprecedented — no budget phone offers a dedicated zoom lens, and the results are genuinely impressive
• The 50MP main sensor produces detailed, well-exposed photos with natural colors that compete with phones costing twice as much
• Low-light photography is adequate but expectedly falls behind Pixel's computational processing — noise is more visible in dim conditions
• Video recording at 4K30 is solid with decent stabilization, though the lack of 4K60 is a limitation some users will notice

Xiaomi 15 Ultra

The crown jewel — a triple Leica camera system with a 1-inch main sensor, 200MP telephoto, and 50MP ultrawide that redefines smartphone photography.

• The 1-inch main sensor captures more light and detail than any competing smartphone camera — photos have a depth and quality that approaches dedicated cameras
• 200MP telephoto with 4.3x optical zoom produces incredibly detailed zoom shots that rival the Galaxy S25 Ultra's 5x periscope
• Leica color science produces warm, film-like tones with natural skin rendering that photographers love
• Video stabilization is the best on any Android phone, though color consistency and dynamic range in video still trail the iPhone

Nothing Phone (3a)

The Snapdragon 7s Gen 3 with 8GB RAM handles everyday tasks smoothly, though it shows its limits with demanding gaming.

• Day-to-day performance is smooth and responsive — apps open quickly, multitasking is adequate, and Nothing OS animations are fluid
• Casual gaming runs well, but demanding titles like Genshin Impact need reduced settings for a smooth experience
• 8GB RAM ensures good app retention for moderate multitasking, though heavy users may notice occasional reloads

Xiaomi 15 Ultra

Snapdragon 8 Elite with 16GB RAM delivers the fastest Android performance available with excellent thermal management.

• Snapdragon 8 Elite with 16GB RAM makes this one of the fastest phones tested — no app or game can slow it down
• Liquid cooling system keeps sustained performance high with minimal throttling during extended gaming sessions
• 16GB RAM ensures smooth multitasking with dozens of apps in memory and efficient AI processing

Nothing Phone (3a)

The 5,000mAh battery delivers excellent two-day endurance with moderate use and comfortable all-day life even under heavy use.

• The 5,000mAh battery easily gets through a full day of heavy use and can stretch to two days with lighter usage — outstanding for the price
• 45W wired charging fills the battery from 0 to 100% in about 55 minutes — decent but not class-leading
• No wireless charging at this price is expected and not a dealbreaker for most budget buyers

Xiaomi 15 Ultra

A 5,500mAh battery with 90W wired and 50W wireless charging delivers both excellent endurance and class-leading charging speeds.

• 90W wired charging fills the 5,500mAh battery from 0 to 100% in about 35 minutes — among the fastest in any flagship
• Battery easily lasts a full day of heavy use including intensive camera work and gaming
• 50W wireless charging is fast enough to replace wired charging for most daily use scenarios

Nothing Phone (3a)

Nothing OS 3.0 is clean, charming, and lightweight — one of the best software experiences in the budget segment.

• Nothing OS 3.0 is a delight — minimal bloat, distinctive monochrome theming, and fun customization options that make Android feel fresh
• Glyph lighting integration adds practical value with notification indicators, timer progress, and delivery tracking — more useful than a gimmick
• 3 years of Android OS updates and 4 years of security patches is adequate but trails Google Pixel a-series phones' longer support

Xiaomi 15 Ultra

HyperOS 2 on Android 15 is feature-rich but divisive — powerful customization options are offset by ads and bloatware in some regions.

• HyperOS 2 is more polished than MIUI, with smooth animations, useful sidebar multitasking, and deep customization
• Pre-installed apps and occasional ads in system UI detract from the premium experience in some regional variants
• Four years of OS updates and five years of security updates — decent but short of Samsung and Google seven-year commitments