Announced February 2026 · Released February 2026
GSMTechTok Score
Xiaomi's first Ultra with a flat display rather than curved edges, and a genuine camera powerhouse behind the Leica partnership. The global model runs a smaller 6,000mAh battery than the 6,800mAh Chinese version — still a real upgrade over the Xiaomi 15 Ultra's 5,410mAh, just not the full domestic-market spec.
Available colours
The 17 Ultra is for a buyer who wants the strongest all-round Ultra-tier phone sold outside China, camera included. GSMArena's own comparison is direct that it's "more 'Ultra' than the Samsung Galaxy S26 Ultra," citing a more versatile camera setup and a real battery-life and charging advantage. It's a strong fit for anyone who specifically wants a flat-display flagship — this is Xiaomi's first Ultra to drop curved edges — and who's comfortable paying a genuine premium for it, since GSMArena's own competition analysis puts the €1,500 starting price (€1,999 for the Leica edition) among the highest in the category. It's a weaker fit for anyone who leans on video recording specifically, or who wants the largest possible battery — that's reserved for the China-only 6,800mAh SKU.
The main camera earns the clearest, most specific praise in GSMArena's testing, which found it turns in near-flawless results at both its native focal length and 2x zoom, in good light and after dark. The telephoto system is genuinely versatile too, offering continuous optical zoom across 3.2–4.3x rather than a single fixed focal length, built around what GSMArena identifies as a customized version of Samsung's 200MP HPE-class periscope sensor. Charging held up well despite the smaller global-market battery — GSMArena's lab testing measured a full charge from 1% in 43 minutes, competitive even against phones with larger cells. The new HyperRGB display panel is a real technical upgrade too, not just a marketing label: GSMArena's testing found it delivers sharper real-world image quality than a traditional PenTile panel would at the same resolution and pixel density.
Video is the phone's clearest, most consistently flagged weak point — GSMArena's global review singles it out as the one thing keeping the phone from a perfect score, and the China-market Leica edition review goes further, describing stabilization specifically as subpar and overall video quality as merely alright rather than class-leading. The telephoto lens also trades away close-focusing ability for its extra reach and resolution, a genuine compromise GSMArena flags directly rather than glosses over. Sustained performance under heavy load is a real concern too — user discussion in GSMArena's own review comments and NotebookCheck's independent testing both point to the Snapdragon 8 Elite Gen 5 running hot and throttling during extended sessions, a chip-wide issue this generation rather than a phone-specific flaw. And the price is genuinely steep even by Ultra-tier standards, with the Leica edition in particular pushing well past €1,500 into what GSMArena itself calls outrageous territory.