Galaxy S21 Ultra 5G Vs Xiaomi 12T Pro

The Samsung Galaxy S21 Ultra 5G, released in January 2021, and the Xiaomi 12T Pro, launched in October 2022, are both high-performance smartphones designed to offer advanced features. While the Galaxy S21 Ultra 5G represents Samsung's premium offering from its release year with a focus on a versatile camera system and a high-resolution display, the Xiaomi 12T Pro emphasizes a high-megapixel main camera and rapid charging capabilities. Both devices operate on the Android platform, providing users with a wide ecosystem of applications and services.

When considering the long-term usability of these devices, their release timelines and software support policies are key factors. The Galaxy S21 Ultra 5G, released in January 2021, received its final major Android OS update, Android 15, in May 2025, with security updates largely terminated as of February 2026, except for critical vulnerabilities. In contrast, the Xiaomi 12T Pro, launched in October 2022, is expected to receive three major Android OS updates, also reaching Android 15, and four years of security patches from its release date.

• Software Longevity: The Xiaomi 12T Pro offers a longer period of guaranteed software updates and security patches compared to the Galaxy S21 Ultra 5G, which has already reached the end of its major software support cycle.
• Repairability: The Xiaomi 12T Pro generally presents a more favorable repairability profile with a score of 7.6 out of 10, indicating a design that is relatively easier to service. The Galaxy S21 Ultra 5G, however, received a lower repairability score of 3 out of 10, primarily due to the extensive use of adhesive and a non-modular display cable, making repairs more challenging.
• Physical Durability: The Galaxy S21 Ultra 5G features an IP68 rating for dust and water resistance, offering robust protection against environmental elements. The Xiaomi 12T Pro has an IP53 rating, providing protection against dust and splashes, but not full water immersion. Both devices utilize Gorilla Glass for screen protection, with the S21 Ultra 5G featuring Gorilla Glass Victus and the 12T Pro using Gorilla Glass 5 on the front.

Both smartphones deliver strong performance for everyday tasks and demanding applications, though they achieve this with different underlying hardware. The Galaxy S21 Ultra 5G is powered by a processor that handles multitasking and graphically intensive games smoothly, providing a responsive user experience. The Xiaomi 12T Pro features a newer generation processor, which offers enhanced performance for CPU and GPU tasks, contributing to fluid app loading and efficient handling of complex operations.

• Processing Power: The Xiaomi 12T Pro's newer processor generally provides a performance advantage, resulting in quicker app launches and more seamless transitions during heavy usage. Users engaging in intensive mobile gaming or video editing may notice the benefits of this updated hardware.
• Multitasking Capabilities: Both devices offer ample RAM configurations, with the Galaxy S21 Ultra 5G available with up to 16GB and the Xiaomi 12T Pro with up to 12GB, ensuring efficient multitasking and smooth operation even with multiple applications open simultaneously.
• Storage Options: The Galaxy S21 Ultra 5G provides storage options up to 512GB, offering extensive space for apps, media, and files. The Xiaomi 12T Pro is available with up to 256GB of internal storage. Neither device supports expandable storage via a microSD card.

The display is a central feature for both the Galaxy S21 Ultra 5G and the Xiaomi 12T Pro, each offering a vibrant and immersive viewing experience with distinct characteristics.

• Display Technology and Resolution: The Galaxy S21 Ultra 5G features a 6.8-inch Dynamic AMOLED 2X display with a high resolution of 3200 x 1440 pixels, resulting in a pixel density of 515 pixels per inch (PPI). This provides exceptionally sharp and detailed visuals. The Xiaomi 12T Pro comes with a 6.67-inch AMOLED display, offering a resolution of 1220x2712 pixels, or 1.5K, with a pixel density of 446 PPI.
• Refresh Rate and Smoothness: Both smartphones boast a 120Hz adaptive refresh rate, which dynamically adjusts based on the content being viewed. This contributes to smoother scrolling, more fluid animations, and a more responsive touch experience. The Xiaomi 12T Pro also supports Dolby Vision and HDR10+, enhancing color accuracy and contrast.
• Brightness and Outdoor Visibility: Both displays offer high brightness levels, ensuring good visibility even in bright outdoor conditions. The Galaxy S21 Ultra 5G's display is HDR10+ certified, contributing to excellent contrast and color reproduction. The Xiaomi 12T Pro's display also supports HDR10+ and has a typical brightness of 500 nits and a peak brightness of 900 nits.

Both devices offer advanced camera systems, though they approach photography with different primary strengths and sensor configurations. The Galaxy S21 Ultra 5G provides a highly versatile quad-camera setup, while the Xiaomi 12T Pro focuses on a high-resolution main sensor.

• Rear Camera System: The Galaxy S21 Ultra 5G features a quad-camera array, including a 108-megapixel wide-angle lens, a 12-megapixel ultrawide lens, a 10-megapixel telephoto lens with 3x optical zoom, and another 10-megapixel telephoto lens with 10x optical zoom. This setup offers extensive zoom capabilities. The Xiaomi 12T Pro is equipped with a triple-camera system, highlighted by a 200-megapixel main sensor with optical image stabilization (OIS), an 8-megapixel ultrawide lens, and a 2-megapixel macro lens.
• Photography Performance: The Galaxy S21 Ultra 5G is praised for its versatile camera system, delivering detailed photos across various focal lengths and strong low-light performance. Its dual telephoto lenses provide significant optical zoom flexibility. The Xiaomi 12T Pro's 200-megapixel main camera excels in capturing highly detailed images, especially in good lighting conditions, allowing for significant cropping without major loss of detail. However, its secondary ultrawide and macro cameras are noted to be less capable.
• Video Recording and Audio: Both phones are capable of recording video at up to 8K resolution at 24 frames per second. The Galaxy S21 Ultra 5G also offers 4K recording at 30 or 60 frames per second. The Xiaomi 12T Pro supports 4K at 30 or 60 frames per second. For audio, the Xiaomi 12T Pro features stereo speakers tuned by Harman Kardon with Dolby Atmos support, providing a rich media consumption experience. The Galaxy S21 Ultra 5G also includes stereo speakers.