Xiaomi 15 Ultra: Two-minute review
Say hello to another bombastic entrant in Xiaomi's Ultra series. The Xiaomi 15 Ultra leads with its Leica-backed camera array, made all the more prominent by the existing 1-inch 50MP main sensor being joined by a new, larger 1/1.4-inch 200MP telephoto sensor.
As with the Xiaomi 14 Ultra, it takes superb shots that don't look as processed or technically 'perfect' as what you might expect out of Google's Pixel imaging pipeline, but they're potentially better for it. Meanwhile, its videography skills have been tailored to meet and beat the likes of the iPhone 16 Pro series across areas including resolution, control, and LOG video capture.
Beyond the excellent imaging experience, the phone's underlining internals impress, with Qualcomm's Snapdragon 8 Elite running the show. That's backed up by tangible optimization benefits from Xiaomi HyperCore resource management, a new IceCool vapor chamber, and the fastest storage and RAM you'll find on any phone out right now.
HyperOS 2.0 (atop Android 15) expands on the AI feature set introduced on the 14 Ultra, with useful translation, productivity and image editing tools. There's nothing that sets Xiaomi's AI feature set apart from major rivals, but it delivers on its promises (save for Reflection Removal, which refused to work correctly in testing).
Beyond AI, there is a wealth of nice refinements to the look and feel of the user experience, however inconsistencies and some inexplicable choices mean Xiaomi's interface remains one of the more convoluted and trickier to deal with. The company has also only committed to four years of OS and six years of security updates, lagging behind industry leaders and harming the phone's long-term value proposition.
The screen is stunning and boasts better drop resistance than its predecessor's, while the new Si-C (silicon carbide) battery lasts less time than expected but can be replenished quickly, thanks to rapid 90W charging. Presumedly due to some EU regulation, 15 Ultras sold in the EU come with a smaller battery than their Chinese counterparts, although this isn't an ailment that's unique to Xiaomi.
All in all, Xiaomi has improved on everything that made the last Ultra so great, while most of the weaknesses are persistent pain points, more deeply rooted in Xiaomi's approach (primarily to software).
For the price, this is a respectable uber-flagship, however those hoping to get their hands on one in markets like the US or Australia will have a tough time doing so, as Xiaomi doesn't sell its phones in these regions, and carrier support isn't guaranteed.
Xiaomi 15 Ultra review: Price and availability
- Priced from £1,299 / €1,599
- Released February 27 in China, March 2 internationally
- Limited to no availability in US and Australia
As with its predecessor, fans in Xiaomi's homeland of China were treated to a native launch of the 15 Ultra first, on February 27. The company then staged an international release in Barcelona just days later, on March 2.
The phone went on sale on the same day, at 14:30pm GMT, coming in with a starting price of £1,299 / €1,599 across the UK and Europe (the same as its predecessor, in the UK). In some markets, there's also a higher 1TB storage model, which costs £200 more.
In regions like the UK, the Xiaomi 15 Ultra undercuts principle rivals – the Galaxy S25 Ultra and iPhone 16 Pro Max – by £50 and £100 respectively, when comparing like-for-like storage capacities. The main difference being that both of those alternatives can be had for less, if you're willing to drop down to 256GB of onboard space, which Xiaomi doesn't offer with the 15 Ultra. Both also come with less RAM than the Xiaomi.
As ever with Chinese phone makers such as Xiaomi, while the 15 Ultra's March 2 launch was heralded as its 'international' release, the brand doesn't sell smartphones in key markets like the US and Australia (although you will find their smart home and lifestyle products there). As such, beyond importing or buying via third-party retailers, you won't find the Xiaomi 15 Ultra locally; not to mention there may be carrier band incompatibilities with networks in those markets.
- Value score: 4.5 / 5
Xiaomi 15 Ultra review: Specs
Xiaomi 15 Ultra review: Design
- Leica camera-inspired colorway
- Xiaomi Shield Glass 2.0 w/ improved drop resistance
- IP68-certified against dust and water
After dropping down display sizes following the Xiaomi Mi 11 Ultra, subsequent generations of the series have generally hovered around the same weight and dimensions, and that continues with the 15 Ultra.
It's a hefty device (226g or 229g, depending on your choice of finish), and a hair thicker than its predecessor. That makes it one of the weightiest candy bar flagships of the current generation and a trait you'll notice in prolonged use, even if it does also reinforce the Ultra's air of premium power.
Aesthetically, the pillowed glass front, chamfered metal frame and large circular camera bump are consistent with the aesthetic Xiaomi has cultivated over the last few generations of Ultra, and stands apart from the more square-jawed looks of its most prominent rivals (save for, perhaps, the similarly curvaceous Honor Magic 7 Pro).
One of the most notable cosmetic changes is to the camera hardware. Whilst the circular quad-sensor array on the 13 Ultra and 14 Ultra offered a pleasing symmetry, Xiaomi has had to shuffle things around quite drastically to accommodate the phone's new headline telephoto snapper. The result is an asymmetrical assortment of lenses that I'd say is weaker visually but gives the 15 Ultra a more utilitarian look, which some might appreciate.
Along with the base all-black and all-white colorways – as was available on the 14 Ultra – this year you also have the option of a Silver Chrome variant (pictured), which tries to evoke the visual identity of Leica's iconic M3.
It's a bit on the nose, as a representation of the ongoing brand partnership between Xiaomi and Leica goes, but it's also undeniably distinct. Two-thirds of the phone's 'aerospace-grade' fiberglass back is wrapped in black faux leather, which stands in contrast to the satin-finish silver it's next to.
The leather has the practical bonus of added grip and after two weeks of testing, hasn't yet shown any signs of wear. That might be down to the fact that I also threw on the included glossy clear hard-shell case whenever taking the phone out and about, though.
On the subject of durability, like its predecessors, the 15 Ultra packs IP68-certified dust and water resistance, which while great, does now technically lag behind key rivals, like the Oppo Find X8 Pro, OnePlus 13 and aforementioned Magic 7 Pro. In addition to IP68-protection, all three of these alternatives have adopted IP69-certification too (check out our pick of the best rugged phones for a rundown of some of the hardiest handsets out there).
While that pillowed glass frontage does seem a little exposed, especially if you were to fumble the 15 Ultra face-down, it's clad in Xiaomi Shield Glass 2.0. The 14 Ultra sported its first-gen Shield Glass, which claimed to be 10x more drop resistant than the Gorilla Glass Victus on the 13 Ultra, while the 2.0 variant is supposedly 16x more resistant, compared to Victus. In theory, a drop on that 'All Round Liquid Display' shouldn't prove fatal.
Xiaomi hasn't eradicated Corning's presence from the Ultra outright, however, with Gorilla Glass 7i covering the camera array on the phone's back. Despite being as scratch resistant as the brand's top-tier Victus 2 glass, when paying Ultra prices, I'd have hoped for sapphire glass or something with even higher scratch resistance (even at the expense of drop durability), considering part of its job is ensuring camera clarity.
- Design score: 4 / 5
Xiaomi 15 Ultra review: Display & audio
- 6.73-inch 2K 20:9 (3200 x 1440) LTPO AMOLED
- 1Hz to 120Hz variable refresh rate
- Improved 'multi-scenario' 3,200-nit peak brightness
The main generational improvement to the viewing experience on the 15 Ultra is its higher peak brightness: an emissive 3,200-nit ceiling that outpaces all its mainstream rivals (the closest being the Super Actua display on the Pixel 9 Pro line, at 3,000-nits), only really falling short of Oppo's and OnePlus' latest flagships, which both claim to reach as high as 4,500-nits.
As with the 14 Ultra, the viewing experience here is unquestionably excellent. Out of the box, it serves up Full HD+ visuals and a dynamic refresh rate (between 1 and 120Hz), however, you have the option to crank the resolution up in the settings menu, to make the most of the phone's impressive 522ppi pixel density. You can also fix motion at 60Hz (for lower power consumption) or 120Hz (for more fluid viewing), and you can even force that higher refresh rate on an app-by-app basis.
Along with options for resolution and HDR upscaling, as well as motion smoothing and TÜV Rheinland-certified blue light eye protection, the 15 Ultra's display also makes the switch to an ultrasonic fingerprint sensor, which proves faster and more reliable than the previous optical solution, even when your hands are a little wet.
Despite an asymmetrical down and forward-firing stereo speaker pair, the Xiaomi 15 Ultra outputs sound with clear separation and clarity through almost the entirety of its volume range.
At maximum volume, the stability of higher frequencies begins to waver, while bass is present throughout, but could be more prominent in the mix. Dolby Atmos support brings with it a set of EQ sliders (including presets) and there's effective spatial audio too.
- Display & audio score: 4.5 / 5
Xiaomi 15 Ultra review: Software
- Launches on HyperOS 2.0 atop Android 15
- New AI features include Interpreter and Reflection Removal
- 4 years of OS + 6 years of security updates
Last year marked a pretty notable shift for Xiaomi's mobile user experience. The company retired MIUI and replaced it with HyperOS, which although familiar on the surface, served up some notable quality-of-life improvements behind the scenes (it took up significantly less space on your device's storage, for example). It also served as the launchpad for their AI feature set.
Now, the Xiaomi 15 series arrives on HyperOS 2.0 (running atop Android 15). For the most part it adds an extra layer of visual polish, with the likes of the Artistic Lock Screens now able to support video, alongside subtle new animations throughout the UI that generally elevate the experience (even if some might be a little heavy-handed).
Better contrast and reworked UI elements across the Settings, Clock and Calendar apps, make them easier to use, as do a tweaked volume control layout and the ability to long-press on control panel entries – like brightness – to expand and access additional features (very iOS-like in its execution).
Frustratingly, Xiaomi insists on continuing to bury or completely hide some fundamental Android controls (such as Extra Dim) without explanation, but it does at least finally let you toggle Today's Recommendations off, which means there's less cruft within your home screen app folders.
HyperOS is a deeply customizable and capable user experience, provided you've got the stones to learn its nuances and forgive its inconsistencies.
There are new and improved AI tools spanning writing, image editing, and language across HyperOS 2.0, with Xiaomi's repetoire most closely mirroring experiences from the likes of OnePlus. Apple, Oppo, Samsung and Google have all leant a little harder into generative imagery on their latest devices, which isn't really part of the experience on the 15 Ultra, beyond image expansion and the ever-creepy AI portrait (check out our Xiaomi 14 review for a deep-dive on that).
The AI Writing toolset has been fleshed out, with summarization, proofreading, extension and tone alteration; all in a handy pop-up card that, once again, looks suspiciously like Apple Intelligence's interface. Like Samsung's Writing Assist, you can call on these tools essentially anywhere you enter text, which creates more opportunities to actually use them.
The translation app – AI Subtitle – has a well thought out and easy to use interface, allowing for conversational use with a speaker sitting either side of the phone, while the existing image editing tools (Expand, Erase, and Sky) have been joined by Enhance and Remove Reflections options (although the latter was next to useless, in testing).
Erase has also been bumped up to Erase Pro, which uses a larger model for improved results, however, unlike the base feature, it relies on an active internet connection to function. In fact, when disabling my data connection, practically none of the 15 Ultra's AI features worked offline, suggesting that the all rely on off-device processing to varying degrees (the exceptions being the base Erase, Remove Reflections and Sky image editing tools).
At the phone's Chinese launch, Xiaomi also showcased interconnectivity with iOS, iPadOS and MacOS devices, including Oppo Find N5-like screen mirroring and wireless file transfer, which is on track to come to global devices in the near future (as such, I haven't been able to test this feature).
Part of the price justification, when it comes to these top-shelf phones, is that they come with long-term support. Apple, Google and Samsung all offer a commitment to around seven years of operating system and security updates, so you know your phone will be supported for the entire time you use it, and also benefit from new functionality over time too.
Despite an improved six years' commitment to security updates with the 15 Ultra, Xiaomi has only promised four years of OS updates, which hurts the phone's value proposition, relative to some of the best phones already on the market.
- Software score: 3.5 / 5
Xiaomi 15 Ultra review: Cameras
- 50MP f/1.63, 1-inch Sony LYT-900 main sensor w/ OIS
- 50MP f/2.2, Samsung ISOCELL JN5 ultra-wide w/ 115º FoV
- 50MP f/1.8, floating 3x Sony IMX858 telephoto w/ OIS + 10cm macro mode
- 200MP f/2.6, periscope 4.3x Samsung ISOCELL HP9 telephoto w/ OIS
- 32MP OmniVision OV32B front camera w/ 90º FoV
The previous Ultra – with the same 1-inch main Sony sensor – in my opinion, captured shots as close as any phone has yet come to emulating what you might more readily expect from the best cameras.
Most of the best camera phones – the Pixels and Galaxys of the world – take technically excellent smartphone photos; replete with tone mapping and HDR processing, detail enhancement and face brightening. While the 15 Ultra has access to all these same tricks, however, it handles images very differently... more authentically.
Xiaomi's processing isn't as technically savvy as, say, Google's and the camera system can be a little inconsistent – especially with attributes like white balance and edge detection (much like on the 14 Ultra) – but it doesn't shy away from contrast and shadow, which when twinned with the natural depth effect afforded to that 1-inch sensor, can help you capture truly arresting shots without really trying.
Add to that the Pro mode manual controls and baked-in Leica filters, and there's a lot you can do with that main snapper, without the need for post-capture editing. That lead 50MP sensor is just the start, of course.
The reason this phone's camera system looks so physically different to its predecessor's is because Xiaomi needed to make room for a huge new 1/1.4-inch telephoto sensor (up from 1/2.51-inches). The 200MP Samsung ISOCELL HP9 that Vivo put to work on its most recent flagship – the X200 Pro – now also finds a home on the 15 Ultra.
Here, it serves up an equivalent 100mm focal length, and helps build on the existing camera system's impressive versatility. That large size means it's able to take in far more light than your average periscopic telephoto sensor (Xiaomi claims 136% more than the 14 Ultra's equivalent), but it's also likely the reason why the 15 Ultra lost out on its predecessor's mechanical aperture; there just wasn't room.
As trade-offs go, it's a compromise I welcome, as this higher fidelity telephoto is far more practical across zoom, portrait and even macro shooting. Speaking of macro, one of the biggest limitations of such a large main sensor is its minimum focal range, which is why it's a relief that the automatic macro mode kicks in and switches to a pleasingly competent ultra-wide.
No longer being unable to stop down in particularly bright shooting scenarios may irk videographers, but at least the Photography Kit allows for ND filters and the like, even if that's more of a band-aid than a solution
As well as filters, Leica's involvement expands to two shooting profiles: Leica Vibrant (the default on Xiaomi's phones) and the more muted Leica Authentic (see above), while some high quality filters can be activatated in-camera too (the monochromatic 'Blue' was a personal highlight).
Xiaomi made a big song and dance about the 14 Pro's video chops, even though stabilization at some resolutions was terrible at launch (later fixed via software updates). Thankfully, that doesn't appear to be a problem with the 15 Ultra's videography skills. You can switch between all the phone's rear sensors while recording at up to 4K/30fps, with options for 4K/120fps, and even 8K/30fps capture, if desired.
The 15 Ultra also joins an exclusive group, by being the only other phone besides the iPhone 15 Pro and iPhone 16 Pro lines to support ACES (Academy of Motion Picture Arts and Sciences) Log video capture (alongside Dolby Vision recording); making it a powerful choice for serious videographers, especially those who prefer Android to iOS.
- Camera score: 4.5 / 5
Xiaomi 15 Ultra review: Performance
- Qualcomm Snapdragon 8 Elite SoC
- LPDDR5X RAM & UFS 4.1 storage
- Xiaomi HyperCore system management
As with the rest of 2025's Android flagship contingent so far, the 15 Ultra arrives running on Qualcomm's latest Snapdragon 8 Elite chipset; in most regions accompanied by 16GB of RAM and 512GB or 1TB of the fastest and most power efficient UFS 4.1 storage on the market (there is a 12GB RAM/256GB version that's trickier to come by).
Xiaomi says the chip serves up 45% better multi-core CPU performance (compared to the 14 Ultra), artificial benchmarking places on equal footing with the recent Honor Magic 7 Pro and the company even featured a slide during its Chinese launch, highlighting every aspect in which it trumps the iPhone 16 Pro Max; including gaming and networking performance.
A new dual channel 'IceLoop' vapour chamber offers enhanced cooling, which in real-world testing ensured that even after an hour's gameplay on a demanding title like Zenless Zone Zero with cranked visual settings (i.e. 60fps instead of 30fps), the phone never rose past a slight warmth.
Game Turbo is also on-hand to prioritize gaming performance, while also silencing notifications and the like, although finding how to bring the app onto your home screen to manage installed games takes some doing (hint: it's hidden within Xiaomi's Security app, of all places).
As with every other phone that relies on the Snapdragon 8 Elite, it offers buckets of headroom, ensuring whatever phone it's in will feel fast and remain capable longer than most others in the long term. Xiaomi's latest HyperCore technology then sits on top, better managing resource allocation, so that opening and reopening apps is faster; meaning less time staring at those initial splash screens than before.
- Performance score: 5 / 5
Xiaomi 15 Ultra review: Battery
- Larger 5,410mAh battery than predecessor
- Up to 90W wired & 50W wireless charging
- 7 hours of screen-on time per charge
While Xiaomi hasn't disclosed why, as with the Honor Magic 7 Pro, the international version of the Xiaomi 15 Ultra packs in a smaller battery (5,410mAh), compared to the Chinese variant (6,000mAh). That said, 5,410mAh is still pretty capacious, and Xiaomi's Si-C Surge Battery tech offers up increased capacity, without adding addition bulk to the phone's design; Apple and Samsung should take notes.
True to the brand, fast charging is part of the equation here, with the same impressive 90W wired and 80W wireless charging support (just don't expect a charger in-box in Europe or the UK).
If you are able to source the correct adapter, at standard speeds the 15 Ultra refilled to 56% in 30 minutes and hit 100% after 67 minutes. If you dip into the phone's battery settings, however, you can enable Top Speed mode, which warns of more noticeable warmth when charging, in the pursuit of faster recharge speeds. When enabled, the phone hit 44% in 30 minutes and 100% in 50.
If you're the forgetful type, Top Speed mode might better serve you, otherwise the results, to me, suggest it's better to leave the phone in standard charging mode, which still should still prove quick enough for most users (and will likely prolong battery health).
While benchmarking using PCMark 3.0's battery test dished out an impressive score on par to the Ultra's most like-minded and similarly-capacious Si-C battery-toting rivals, real-world longevity underwhelmed at only 7 hours of use per charge. That equates to a day's use, but considering the battery tech, system improvements and capacity of the cell(s), I would have expected closer to the Magic 7 Pro, which has a marginally smaller battery but lasted 45% longer in testing.
- Battery score: 4 / 5
Should you buy the Xiaomi 15 Ultra?
Buy it if...
You want one of the best camera phones today
If you couldn't tell by the design, the Xiaomi 15 Ultra is all about the camera. While it's strong on all fronts, its camera is the prime reason to consider it.
You want a great multimedia experience
The 15 Ultra's top-tier internals and crisp 2K OLED screen make it great for gaming and enjoying media.
Don't buy it if...
You want a long-lasting device
While fast charging is superb, battery life is pretty middle of the road. As for long-term use, only four years of OS updates for a phone this expensive isn't great.
You like a clean, easy-to-use user experience
HyperOS 2.0 is certainly more elegant and easier to use than previous iterations of Xiaomi's mobile interface, but it comes with a high learning curve and some truly illogical inconsistencies compared to other operating systems out there.
Xiaomi 15 Ultra review: Also consider
It's clear from the jump where the Xiaomi 15 Ultra's strengths lie, but there are numerous alternatives that offer something similar or excel in those areas where Xiaomi still needs to improve.
iPhone 16 Pro Max
Sure, it's a fraction more expensive, but the top-tier iPhone of today shares in the 15 Ultra's emphasis on capturing pro-grade video, while the user experience is cleaner and will likely receive OS updates for longer.
Read our full iPhone 16 Pro Max review
Honor Magic 7 Pro
Same chipset, same emphasis on photography, with impressive zoom abilities, plus longer-lasting battery life and longer OS update support for less money.
Read our full Honor Magic 7 Pro review
Samsung Galaxy S25 Ultra
A similar feature set, with a focus on AI, and longer software support render this Ultra a worthwhile alternative. It's also readily available in markets where the 15 Ultra isn't
Read our full Samsung Galaxy S25 Ultra review
How I tested the Xiaomi 15 Ultra
- Review test period: two weeks
- Testing included: everyday use including web browsing, social media, photography, video calling, gaming, streaming video, music playback
- Tools used: Geekbench 6, Geekbench ML, 3DMark, native Android stats, Xiaomi 120W charger
Xiaomi sent me the 15 Ultra just ahead of its Chinese and international launch events. I used the phone as my daily driver over a couple of weeks; taking it to social events for camera testing, gaming and other general smartphone use; from smart home control to social media and web browsing.
Benchmarks were carried out in both Balanced and Performance modes, although most of the time Balanced mode results were actually high. As often happens, Xiaomi devices block access to servers for graphical benchmarking apps, so I was only able to quantify CPU performance, while graphical testing was anecdotal, based on gaming usage and the like.
Having reviewed smartphones for nearly 15 years, including numerous Xiaomi smartphones, as well as devices from the company's key competition, I felt equipped to review this flagship, assessing its strengths and abilities against the market it's competing in.
First reviewed February 2025
