Xiaomi 12S Ultra 12GB RAM Smartphone Best Review

The Xiaomi 12S Ultra 12GB RAM Smartphone is an ultimate flagship mobile phone with an extra focus on imaging. The Xiaomi 12S Ultra is a premium-level smartphone that will help individuals engage in multitasking projects and work efficiently.

The available specifications of the 12GB RAM Smartphone also offer a complete entertainment unit to users. Along with that, the smartphone has also provided a featureful camera setup. For gaming and movie, Xiaomi 12S Ultra’s AMOLED display offers splendid visuals for every task. Its size is 6.67-inches, pixel density is 395ppi, and resolution is 2400 x 1080 pixels.

To protect Xiaomi 12S Ultra from scratches and physical damage, the mobile phone manufacturer has also layered it with a Corning Gorilla Glass v5.

Xiaomi 12S Ultra 12GB RAM Smartphone Best Review

For optics sections, Xiaomi 12S Ultra 12GB RAM Smartphone holds a Quad-camera system installed on its rear end. It comprises a

  • Primary Lens of 108MP resolution
  • Wide Angle Lens with 16MP resolution
  • 8MP Lens and a 5MP Lens

Smartphone users can capture beautiful images using the main characteristics like HDR mode, Digital Zoom, Phase Detection autofocus, and more. The front side of the Xiaomi 12S Ultra is loaded with a 32MP Lens.

Xiaomi 12S Ultra 12GB RAM Smartphone Specifications

  • Body: 163.2×75.0x9.1mm, 225g; Glass front (Gorilla Glass Victus), eco-leather back, aluminium frame; IP68 dust/water resistant (up to 1.5m for 30 mins).
  • Display: 6.73″ LTPO2 AMOLED, 1B colors, 120Hz, Dolby Vision, HDR10+, 1000 nits (HBM), 1500 nits (peak), 1440x3200px resolution, 20:9 aspect ratio, 522ppi.
  • Chipset: Qualcomm SM8475 Snapdragon 8+ Gen 1 (4 nm): Octa-core (1×3.19 GHz Cortex-X2 & 3×2.75 GHz Cortex-A710 & 4×1.80 GHz Cortex-A510); Adreno 730.
  • Memory: 256GB 8GB RAM, 256GB 12GB RAM, 512GB 12GB RAM; UFS 3.1.
  • OS/Software: Android 12, MIUI 13.
  • Rear camera: Wide (main): 50.3 MP, f/1.9, 23mm, 1.0″, 1.6µm, multi-directional PDAF, Laser AF, OIS; Ultra wide angle: 48 MP, f/2.2, 13mm, 1/2.0″, 0.8µm, Dual-Pixel PDAF; Telephoto: 48 MP, f/4.1, 120mm, 1/2.0″, 0.8µm, PDAF, OIS, 5x optical zoom; Depth: TOF 3D.
  • Front camera: 32 MP, f/2.4, 25mm (wide), 0.7µm.
  • Video capture: Rear camera: 8K@24fps, 4K@30/60fps, 1080p@30/60/120/240fps, 720p@3840fps, gyro-EIS, Dolby Vision HDR 10-bit rec. (4K, 1080p); Front camera: 1080p@30.
  • Battery: 4860mAh; Fast charging 67W, Fast wireless charging 50W, 100% in 52 min (advertised), Reverse wireless charging 10W, Quick Charge 4, Power Delivery 3.0.
  • Misc: Fingerprint reader (under display, optical); NFC; Infrared port; stereo speakers.

Xiaomi 12S Ultra 12GB RAM Smartphone arrives in a black box to set it apart from lesser twelves – a distinction. From GSM Arena observations, the smartphone is not the one-off specially designed package in which the Xiaomi 10 Ultra showed up, but it’s still somewhat of a statement.

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Users can get a soft transparent case for protection, though Xiaomi 12S Ultra doesn’t feel right to slap a piece of silicone worth pennies on a phone as premium as this one. And it does turn head heads, the Xiaomi 12S Ultra.

Xiaomi 12GB RAM Smartphone Display

The 12GB RAM Smartphone comes with a bit of a surprise development in that it’s using a different, slightly smaller display than last year’s model. At 6.73 inches in diagonal, it’s not tiny, of course, and the 0.08″ difference is only in the numbers – it’s not like you’d notice it.

Xiaomi 12S Ultra 12GB RAM Smartphone Best Review

The new display size, together with the relocated selfie camera, suggests it’s the same panel as on the 12 Pro, in turn, the same as the 12S Pro – it does make sense to have the same board across more devices in the lineup.

The 12GB RAM Smartphone resolution is 1440x3200px (20:9 ratio, 522ppi pixel density), and the LTPO2 AMOLED panel should allow dynamic refresh rate switching between 1 and 120Hz. As is customary for Xiaomi, the 12S Ultra’s display has all sorts of HDR support, including DolbyVision, and it’s a 10-bit panel, so it’s capable of rendering 1 billion colour gradations.

For brightness testing, the 12GB RAM Smartphone posted excellent numbers, as expected. 120nits brighter than the predecessor with the auto boost in bright ambient conditions, the 12S Ultra is virtually the same as the 12 Pro and on par with the iPhone 13 Pro Max and Vivo X80 Pro.

Only Samsung’s own S22 Ultra can put out more nits, some 200. Meanwhile, the 500ish nits in manual operation are the norm on a modern-day flagship, with only the iPhone allowing significantly higher brightness at the top end of its slider.

Xiaomi 12S Ultra 12GB RAM Smartphone Full Specifications

  • Body
    • Dimensions: 163.2 x 75 x 9.1 mm (6.43 x 2.95 x 0.36 in)
    • Weight: 225 g (7.94 oz)
    • Build: Glass front (Gorilla Glass Victus), eco-leather back, aluminium frame
    • SIM: Dual SIM (Nano-SIM, dual stand-by)
    • IP68 dust/water resistant (up to 1.5m for 30 mins)
  • Display
    • Type: LTPO2 AMOLED
      • 1B colours
      • 120Hz
      • Dolby Vision
      • HDR10+
      • 1000 nits (HBM)
      • 1500 nits (peak)
    • Size: 6.73 inches, 108.9 cm2 (~89.0% screen-to-body ratio)
    • Resolution: 1440 x 3200 pixels, 20:9 ratio (~522 PPI density)
    • Protection: Corning Gorilla Glass Victus
  • Platform
    • Operating System: Android 12, MIUI 13
    • Chipset: Qualcomm SM8475 Snapdragon 8+ Gen 1 (4 nm)
    • CPU: Octa-core (1×3.19 GHz Cortex-X2 & 3×2.75 GHz Cortex-A710 & 4×1.80 GHz Cortex-A510)
    • GPU: Adreno 730
  • Memory
    • Card slot: No
    • Internal: 256GB 8GB RAM, 256GB 12GB RAM, 512GB 12GB RAM
    • UFS 3.1
  • Main Camera
    • Quad: 50.3 MP, f/1.9, 23mm (wide), 1.0″, 1.6µm, Dual Pixel PDAF, Laser AF, OIS
    • 48 MP, f/4.1, 120mm (periscope telephoto), 1/2.0″, 0.8µm, PDAF, OIS, 5x optical zoom
    • 48 MP, f/2.2, 13mm, 128˚ (ultrawide), 1/2.0″, 0.8µm, Dual-Pixel PDAF
    • TOF 3D, (depth)
    • Features: Leica lenses
      • Dual-LED flash
      • HDR, panorama
    • Video: 8K@24fps
      • 4K@30/60fps
      • 1080p@30/60/120/240fps
      • 720p@3840fps
      • gyro-EIS
      • Dolby Vision HDR 10-bit rec.
      • (4K, 1080p)
  • Selfie camera
    • Single: 32 MP, f/2.4, 25mm (wide), 0.7µm
    • Features: HDR, panorama
    • Video: Yes
  • Sound
    • Loudspeaker: Yes, with stereo speakers
    • 3.5mm jack: No
    • 24-bit/192kHz audio
    • Tuned by Harman Kardon
  • Comms
    • WLAN: WiFi 802.11 a/b/g/n/ac/6e
      • dual-band
      • WiFi Direct
      • DLNA, hotspot
    • Bluetooth: 5.2, A2DP, LE, aptX HD, aptX Adaptive
    • GPS: Yes, with A-GPS. Up to tri-band: GLONASS (1), BDS (3), GALILEO (2), QZSS (2), NavIC
    • NFC: Yes
    • Infrared port: Yes
    • Radio: No
    • USB: USB Type-C 2.0, USB On-The-Go
  • Features
    • Sensors: Fingerprint (under display, optical)
      • accelerometer
      • gyro
      • compass
      • colour spectrum
      • barometer
    • Virtual proximity sensing
  • Battery
    • Type: Li-Po 4860 mAh, non-removable
    • Charging: Fast charging 67W, 100% in 41 min (advertised)
    • Fast wireless charging 50W, 100% in 52 min (advertised)
    • Reverse wireless charging 10W
    • Quick Charge 4
    • Power Delivery 3.0
  • Misc
    • Colours: Black
      • Dark Green
  • Tests
    • Performance: AnTuTu: 1039412 (v9)
    • GeekBench: 4300 (v5.1)
    • GFXBench: 51fps (ES 3.1 onscreen)
    • Display: Contrast ratio: Infinite (nominal)
    • Camera: Photo / Video
    • Loudspeaker: -25.6 LUFS (Very good)
    • Battery life: Endurance rating 93h
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Xiaomi 12S Ultra Camera Review

The 12GB RAM Smartphone borrowed clue of camera design from its predecessor and took things in a whole different direction. What used to be a rectangle on the former model had some moderately other goals – Xiaomi had to fit a display in there, and it was almost a game of Tetris arranging the two wide cameras, the periscope telephoto, and the additional hardware – the rectangular block of a camera island worked perfectly.

Xiaomi 12S smartphone has a pretty sizeable circle, 53-ish mm in diameter. That number is oddly close to the physical diameter of the Summicron-M 50 f/2, a staple of Leica’s lineup – coincidence.

The golden accent on the outside of the camera ring is also reminiscent of the colour Leica uses for its lens markings. The back panel of the 12GB RAM Smartphone is an absolute joy to handle, and it’s the softest’ leather-like finish on a phone we’ve fondled. Naturally, it doesn’t pick up fingerprints one bit.


For all the character and personality on the back, the Xiaomi 12S Ultra 12GB RAM Smartphone can be any other smartphone when seen from the display side. That’s not meant to be an offence; it’s just how it is with modern-day smartphones.

One slight difference coming from the 11 gen is the relocation of the selfie camera from the left corner to the middle. Users reckon that has something to do with this year’s Ultra adopting the same display panel as the Pro, while the Mi 11 Ultra used a different display from the rest of the lineup.

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It is still a curved edge display with minimal bezels all around, so the convinced supporters of ‘flat handle better’ and ‘thicker chin is better for grip’ may need to look for another smartphone with a 1″ camera. Technically, the Xperia Pro-I does fit that description.

This reviewer had no issue with misinterpreted touch input on the 12S Ultra, nor does he have complaints after driving a similarly curvy Mi 11 Ultra daily. The layout of the controls and features around the aluminium frame of the Xiaomi 12S Ultra 12GB RAM Smartphone remains unchanged primarily from the previous generation.

A power button and volume rocker are placed on the phone’s right side, which is more extensive this time around – a welcome development after the somewhat unfittingly small power button on the old model. There’s still nothing on the left other than an antenna line.

The Xiaomi 12S Ultra 12GB RAM Smartphone measures 163.2x75x9.1mm, some 0.7mm thicker than the 11 Ultra – we’d point the finger at the soft leather-like finish. The other dimensions are practically unchanged.

You could say that about the weight as well – at 225g, the new model is marginally lighter than the old one, but at this level, we’d say that 9g isn’t tangible. The 12S Ultra is a large phone, but by no means an unwieldy one and its curves help make it feel slightly more compact than a simple squarish block of the same size and proportions.

The Xiaomi 12S Ultra 12GB RAM Smartphone doesn’t quite deliver in real life for all supposed HDR display capabilities. Netflix, in particular, is only suitable for SD quality and no HDR – understandable since the app reports a basic L3 Widevine certification.

But DRM Info lists the highest L1 level, and sure enough, Amazon Prime Video does allow FullHD streaming, though that isn’t HDR. YouTube, for one, is more cooperative and does stream in HDR.

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Xiaomi 12S Ultra 12GB RAM Smartphone Best Review

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