Galaxy S21 Ultra 5G Vs iPhone XS

The Samsung Galaxy S21 Ultra 5G, released in January 2021, and the iPhone Xs, launched in September 2018, represent flagship smartphones from their respective manufacturers. While both devices offered premium experiences at their release, they cater to different ecosystems and user preferences. The Galaxy S21 Ultra 5G runs on Android, offering extensive customization, while the iPhone Xs operates on Apple's iOS, known for its streamlined user experience. Key differentiators include their display technologies, camera systems, and the duration of software support.

When considering the longevity of these devices, their release timelines and subsequent software support are crucial factors.

• Software Updates: The Galaxy S21 Ultra 5G, launched with Android 11, received four major Android OS updates, concluding with Android 15 (One UI 7.0) in early 2025. Security updates for the S21 series ended in February 2026. The iPhone Xs, released with iOS 12, received major iOS updates up to iOS 16. While it did not receive iOS 17, it continued to receive security updates for iOS 18.7.x as of March 2026, though iOS 26 (released in 2025) dropped major feature support for the device.
• Practical Lifespan: Users of the Galaxy S21 Ultra 5G can expect a device that has recently concluded its official software support, meaning new Android features will not be available, but it remains functional for everyday tasks. The iPhone Xs, being an older device, has also reached the end of its major iOS update cycle, with security updates continuing for a period. This means both devices will continue to function, but newer applications or features requiring the latest operating system versions may eventually become incompatible.
• Repairability and Materials: Both phones feature glass front and back panels, with the S21 Ultra 5G utilizing Gorilla Glass Victus for enhanced durability and an aluminum frame, while the iPhone Xs uses a durable glass and a stainless steel frame. Both devices carry an IP68 rating for dust and water resistance, indicating a similar level of protection against environmental elements.

The performance of a smartphone impacts daily responsiveness, app handling, and multitasking capabilities.

• Processing Power: The Galaxy S21 Ultra 5G is equipped with a powerful processor that, at its release, was designed to handle demanding applications and intensive multitasking with ease. The iPhone Xs features a capable processor that provided smooth performance for its time, adept at managing daily tasks and many applications.
• Multitasking and Storage: The Galaxy S21 Ultra 5G typically offers higher RAM configurations, which can contribute to smoother multitasking with numerous applications open simultaneously. Both devices were available with various storage options, up to 512GB, catering to users with extensive media and app libraries.
• Real-world Usage: Users of the S21 Ultra 5G often praise its snappy performance and ability to run graphically intensive games and complex applications without significant slowdowns. The iPhone Xs, while still performing well for general use, may show its age with the most demanding modern applications or heavy multitasking compared to newer devices.

The display is a primary interface for smartphone interaction, influencing everything from media consumption to daily browsing.

• Display Technology and Size: The Galaxy S21 Ultra 5G features a larger 6.8-inch Dynamic AMOLED 2X display, offering a more expansive viewing area. The iPhone Xs has a 5.8-inch Super Retina OLED display, providing a more compact form factor. Both utilize OLED technology, known for deep blacks and vibrant colors.
• Resolution and Refresh Rate: The S21 Ultra 5G boasts a QHD+ resolution (3200x1440 pixels) and an adaptive 120Hz refresh rate, resulting in exceptionally sharp images and fluid scrolling. The iPhone Xs offers a resolution of 1125 x 2436 pixels and a standard 60Hz refresh rate, which provides clear visuals but a less fluid motion experience compared to higher refresh rate displays.
• Brightness and Clarity: The Galaxy S21 Ultra 5G can reach a peak brightness of 1500 nits, making it highly visible even in bright outdoor conditions. The iPhone Xs has a maximum brightness of 625 nits, which is sufficient for most indoor and outdoor scenarios but may struggle more in direct sunlight.

Camera capabilities are a significant consideration for many users, impacting the quality of photos and videos captured.

• Rear Camera System: The Galaxy S21 Ultra 5G features a versatile quad-camera setup, including a 108MP main sensor, a 12MP ultrawide lens, and two 10MP telephoto lenses offering 3x and 10x optical zoom. This configuration allows for extensive photographic flexibility, including impressive zoom capabilities. The iPhone Xs has a dual 12MP rear camera system, comprising a wide-angle and a 2x telephoto lens.
• Photography Performance: The S21 Ultra 5G excels in detail capture, especially with its high-resolution main sensor and advanced zoom features, making it suitable for a wide range of photographic situations, including distant subjects. The iPhone Xs delivers consistent and natural-looking photos in good lighting conditions, with its telephoto lens providing optical zoom for portraits and closer shots.
• Video Recording and Front Camera: Both devices support 4K video recording, with the S21 Ultra 5G also capable of 8K video capture. The S21 Ultra 5G has a 40MP front camera, offering high-resolution selfies, while the iPhone Xs features a 7MP front camera with Face ID capabilities.