Galaxy S21 Ultra 5G • Unlocked vs iPhone 15 • Locked AT&T

The Samsung Galaxy S21 Ultra 5G, released in January 2021, and the iPhone 15, launched in September 2023, represent distinct approaches to premium smartphone design and functionality. While both offer advanced mobile experiences, they differ significantly in their operating systems, display characteristics, and camera philosophies. The Galaxy S21 Ultra 5G runs on Android, providing a highly customizable interface, whereas the iPhone 15 operates on Apple's iOS, known for its streamlined user experience.

When considering the long-term usability of these devices, their release timelines and software support play a significant role.

• Software Longevity: The iPhone 15, being a newer device, is expected to receive major iOS updates for a longer period, typically 5-6 years from its release in September 2023. The Galaxy S21 Ultra 5G, released in January 2021, launched with Android 11 and has received updates up to Android 14, which is likely its last major OS upgrade, meaning its software support window is closing sooner.
• Physical Durability: Both devices feature robust builds with IP68 ratings for water and dust resistance, indicating they can withstand submersion in up to 6 meters of water for 30 minutes. The iPhone 15 incorporates Ceramic Shield on the front and a color-infused glass back, while the Galaxy S21 Ultra 5G uses Gorilla Glass Victus on both its front and back.
• Repairability: The iPhone 15 initially received a lower repairability score but was later promoted to a 7/10 due to software updates that allow for easier part calibration, making repairs more accessible. Information regarding the specific repairability score for the Galaxy S21 Ultra 5G is less consistently available, but generally, Android devices can vary widely in ease of repair.

The performance of a smartphone is crucial for daily tasks, from browsing to demanding applications and gaming. Both devices offer capable performance, but with different underlying architectures.

• System Responsiveness: The iPhone 15, powered by a current-generation processor, delivers smooth and efficient performance for everyday use, app loading, and multitasking. The Galaxy S21 Ultra 5G, featuring a powerful processor from its release year, also handles demanding applications and multitasking effectively, though its performance profile is from an earlier generation.
• Battery Behavior: The Galaxy S21 Ultra 5G is equipped with a larger 5000 mAh battery, which typically translates to extended usage times for many users. The iPhone 15 has a smaller battery capacity (3349 mAh), but its optimized software and efficient processor contribute to reliable all-day power for most users.
• Storage and Multitasking: Both devices offer various internal storage options, including 128GB, 256GB, and 512GB, providing ample space for apps and media. The Galaxy S21 Ultra 5G typically comes with more RAM (12GB or 16GB) compared to the iPhone 15's 6GB, which can be beneficial for heavy multitasking and keeping many applications open simultaneously.

The visual experience is a key aspect of any smartphone, and both the Galaxy S21 Ultra 5G and iPhone 15 offer high-quality displays with distinct characteristics.

• Display Technology and Clarity: The Galaxy S21 Ultra 5G features a 6.8-inch Dynamic AMOLED 2X display with a QHD+ resolution (3200 x 1440 pixels), resulting in a very sharp image with 515 pixels per inch. The iPhone 15 has a 6.1-inch Super Retina XDR OLED display with a resolution of 2556 x 1179 pixels, offering excellent clarity at 460 pixels per inch. Both OLED technologies provide deep blacks and vibrant colors.
• Brightness and Refresh Rate: The iPhone 15 boasts a higher peak outdoor brightness of up to 2000 nits, making it highly visible in direct sunlight. The Galaxy S21 Ultra 5G reaches up to 1500 nits peak brightness. A significant difference lies in the refresh rate: the Galaxy S21 Ultra 5G offers an adaptive 120Hz refresh rate for smoother scrolling and animations, while the iPhone 15 maintains a standard 60Hz refresh rate.
• Screen Size and Features: The Galaxy S21 Ultra 5G provides a larger screen, which can enhance media consumption and productivity. The iPhone 15, while smaller, introduces the Dynamic Island, an interactive area around the front camera cutout that displays alerts and background activities.

Both smartphones offer advanced camera systems designed to capture high-quality photos and videos, though they approach imaging with different strengths.

• 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, allowing for significant zoom capabilities. The iPhone 15 has a dual-camera system with a 48MP main sensor and a 12MP ultrawide lens, utilizing its main sensor to also provide a 2x telephoto option.
• Photography Performance: The Galaxy S21 Ultra 5G is praised for its detailed 108MP shots and impressive optical zoom range, performing well in various lighting conditions. The iPhone 15's 48MP main camera delivers sharp, detailed images with improved low-light performance and enhanced portrait capabilities.
• Video Recording and Front Camera: Both devices are capable of recording high-quality video, with the Galaxy S21 Ultra 5G supporting up to 8K resolution at 24fps, and the iPhone 15 offering 4K video recording at up to 60fps. For selfies, the Galaxy S21 Ultra 5G has a 40MP front camera, while the iPhone 15 features a 12MP front camera with autofocus.