Galaxy S21 5G vs Galaxy S24 Ultra

The longevity of a smartphone is influenced by its physical durability and the duration of software support it receives.

• Release Timeline: The Galaxy S21 5G was released in January 2021, making it a device from an earlier generation. The Galaxy S24 Ultra, launched in January 2024, benefits from being a much newer model.
• Software Longevity: The Galaxy S21 5G received approximately four years of major Android OS updates and five years of security updates, aligning with Samsung's policy for devices from its era. In contrast, the Galaxy S24 Ultra is part of a new commitment from Samsung, guaranteeing seven generations of Android OS updates and seven years of security updates, extending its software support significantly further, potentially until 2031.
• Physical Durability: Both devices feature an IP68 rating for dust and water resistance. The S21 5G uses Corning Gorilla Glass Victus for screen protection and has a plastic back with an aluminum frame. The S24 Ultra elevates this with Corning Gorilla Armor on its display and a titanium frame, offering enhanced scratch resistance and overall robustness.

Performance is a key differentiator, impacting how smoothly applications run and how efficiently the device handles demanding tasks.

• Processing Power: The Galaxy S21 5G is equipped with a capable processor for its time, allowing for smooth navigation and handling of most everyday applications. The Galaxy S24 Ultra features a significantly more advanced current-generation processor, optimized for demanding applications, high-resolution gaming, and advanced on-device artificial intelligence features. This results in faster app loading, more fluid multitasking, and superior performance in graphically intensive games.
• Multitasking and Storage: The S21 5G typically comes with 8GB of RAM and storage options up to 256GB. The S24 Ultra offers 12GB of RAM and storage options up to 1TB, providing more headroom for multitasking and ample space for files and applications. Neither device offers expandable storage via a microSD card.
• Battery Behavior: The Galaxy S21 5G houses a 4000 mAh battery, supporting 25W wired and 15W wireless charging. The Galaxy S24 Ultra features a larger 5000 mAh battery and supports faster 45W wired charging, alongside 15W wireless charging. This larger capacity and faster charging on the S24 Ultra generally translate to longer usage times and quicker recharges.

The visual experience is largely defined by the quality and characteristics of the display.

• Display Technology and Size: Both devices feature Dynamic AMOLED 2X displays, known for vibrant colors and deep blacks. The Galaxy S21 5G has a 6.2-inch display, offering a more compact form factor. The Galaxy S24 Ultra features a larger 6.8-inch display, providing a more expansive viewing area.
• Resolution and Brightness: The S21 5G offers a Full HD+ resolution (2400 x 1080 pixels) with a peak brightness of 1300 nits. The S24 Ultra steps up to a Quad HD+ resolution (3120 x 1440 pixels) and a significantly higher peak brightness of 2600 nits, which enhances clarity and visibility, especially in bright outdoor conditions.
• Refresh Rate and Protection: Both models feature an adaptive 120Hz refresh rate for smooth scrolling and responsiveness. The S24 Ultra's display is protected by Corning Gorilla Armor, offering advanced durability, while the S21 5G uses Corning Gorilla Glass Victus. The S24 Ultra also features a flat display, which some users find easier for screen protector application and S Pen use.

Camera systems have evolved significantly, offering different capabilities for capturing photos and videos.

• Rear Camera System: The Galaxy S21 5G features a triple camera setup: a 12MP wide-angle lens, a 64MP telephoto lens with 3x hybrid optic zoom, and a 12MP ultrawide lens. The Galaxy S24 Ultra boasts a more versatile quad-camera system: a 200MP wide-angle main sensor, a 12MP ultrawide, a 10MP telephoto with 3x optical zoom, and a 50MP periscope telephoto with 5x optical zoom. This provides greater flexibility for various photographic scenarios, particularly with enhanced zoom capabilities.
• Photography Performance: The S21 5G delivered strong image quality for its release period, with good dynamic range and consistent results across its lenses. The S24 Ultra offers higher resolution and improved low-light performance, especially with its larger sensors and advanced image processing. Users have noted the S24 Ultra's ability to produce detailed and vibrant images, with continuous improvements through software updates.
• Video Recording: Both devices are capable of recording 8K video. The S24 Ultra offers more advanced video features, including 4K recording at up to 120fps on some lenses and improved stabilization, making it well-suited for high-quality video capture.

Beyond core specifications, several practical features contribute to the overall user experience.

• Connectivity: Both phones support 5G connectivity. The Galaxy S21 5G includes Wi-Fi 6 and Bluetooth 5.0. The Galaxy S24 Ultra features newer standards like Wi-Fi 6E/7 and Bluetooth 5.3, offering potentially faster and more stable wireless connections. The S24 Ultra also includes Ultra Wideband (UWB) support and Emergency SOS via satellite.
• Ports and Biometrics: Both devices utilize a USB-C port for charging and data transfer. Neither includes a traditional headphone jack. For security, both feature an in-display ultrasonic fingerprint sensor.
• Design and Handling: The Galaxy S21 5G is more compact and lighter, weighing 169g with dimensions of 151.7 x 71.2 x 7.9 mm, making it easier for one-handed use. The Galaxy S24 Ultra is a larger and heavier device at 232g and 162.3 x 79.0 x 8.6 mm, reflecting its expansive display and larger battery. The S24 Ultra also integrates the S Pen, offering additional functionality for note-taking and navigation.