Xiaomi 15 Review: Last Compact Android Powerhouse

content: The Compact Flagship Dilemma

For enthusiasts of smaller smartphones, the Xiaomi 15 presents a bittersweet proposition. As one of the final compact Android flagships (alongside Samsung's Galaxy S25), its €999 price tag demands scrutiny. After extensive testing in Barcelona—including real-world scenarios from gaming marathons to shower use—I've identified where this 6.36" device shines and where HyperOS frustrates. Its existence feels like a minor miracle in 2025's landscape of oversized devices, but does its performance justify the premium?

Why Compact Still Matters

The Xiaomi 15's 196g weight and curved corners make one-handed use genuinely viable, a rarity among today's flagships. Unlike heavier counterparts, it won't strain your wrist during prolonged use. Xiaomi's Shield Glass (front and back) survived my accidental fumbles, while the pre-installed screen protector is a thoughtful touch missing from many rivals.

content: Hardware & Performance Breakdown

Display & Build Quality

The 6.36" AMOLED panel delivers:

120Hz refresh rate scaling (1-120Hz)
2,600-nit peak brightness (visible in Barcelona's harsh sunlight)
Rainwater-resistant touch response—tested during actual shower use
Ultrasonic fingerprint sensor with reliable 3D mapping, though moisture occasionally causes hiccups

The matte aluminum frame resists fingerprints, while the IP68 rating provides peace of mind. Color options like the subtle "Pale Green" extend to the metal edges, creating a cohesive aesthetic.

Power & Thermal Management

Equipped with the Snapdragon 8 Gen 4 and 16GB RAM, it handles demanding games like Wuthering Waves at 60fps without throttling. However:

Heat buildup occurs after 20-30 minutes of gaming despite vapor chamber cooling
HyperOS occasionally stutters during multitasking, unrelated to the chipset
5,240mAh battery lasted 18 hours in my stress test (6am-midnight with camera use, Spotify streaming, and navigation)
90W wired charging provides 50% power in 10 minutes

content: Camera Capabilities Tested

Main & Telephoto Performance

Xiaomi's 50MP Light Fusion 900 sensor (not the Ultra's LYT-900) excels in low light with minimal noise. Key observations:

Authentic vs. Vibrant modes offer creative flexibility (Authentic preserves moody shadows)
60mm telephoto (2.6x) uses a 50MP Samsung GN5 sensor—ideal for portraits but struggles with moving subjects
Master Portrait mode allows post-shot bokeh adjustment

Ultra-Wide & Video

The 50MP ultra-wide (14mm equivalent) avoids the typical color shifts seen in competitors. For video:

8K/30fps capture eats storage quickly
4K/120fps provides smooth slow-motion
Cinematic Mode locks to 4K/30fps but enables 10-bit color grading
Quad-mic array records clear audio in noisy environments

content: HyperOS Quirks & AI Features

Xiaomi's software remains a mixed bag:

Notification bugs caused unresponsive taps during testing
Poor UI contrast makes notifications illegible against light backgrounds
Pre-installed bloatware clutters the experience

However, useful AI tools include:

Real-time subtitling for any audio/video content
Object removal in photos (takes 15-20 seconds per edit)
Live translation during calls

content: Final Verdict

Who Should Buy the Xiaomi 15?

This device delivers for:

Compact phone loyalists wanting flagship specs
Gamers prioritizing sustained performance over thermals
Photographers preferring moody, natural HDR over artificial vibrancy

Actionable Takeaways

Enable Authentic camera mode for realistic color science
Use 90W charging for rapid top-ups
Disable unused AI services to improve battery life
Apply a grippy case—the glass back is slippery
Update HyperOS immediately to patch bugs

The Xiaomi 15 proves compact flagships can still compete, offering 90% of the Ultra's capabilities in a smaller form. While HyperOS needs refinement, the hardware excels—particularly the rain-resistant display and telephoto camera. For those tired of phablets, this is your last, best Android option.

"Would you sacrifice some software polish for a truly pocket-friendly flagship? Share your dealbreakers below!"