Galaxy S21 Ultra 5G Vs Galaxy S24 FE

The Samsung Galaxy S21 Ultra 5G, released in January 2021, and the Samsung Galaxy S24 FE, launched in October 2024, represent different segments and generations within Samsung's smartphone lineup. While the S21 Ultra was a top-tier flagship at its release, the S24 FE is positioned as a more accessible option, incorporating newer software support policies and design philosophies. Both devices run on the Android operating system with Samsung's One UI overlay, offering a consistent user experience.

The longevity of a smartphone is influenced by its release date, software support, and physical durability.

• Software Support: The Galaxy S21 Ultra 5G, released in 2021, received its final major Android OS update (Android 15) in May 2025, with security updates ceasing in February 2026. In contrast, the newer Galaxy S24 FE, launched with Android 14, is promised seven generations of OS upgrades and seven years of security updates, extending its software lifespan significantly until around 2031.
• Physical Durability: Both devices feature IP68 ratings for water and dust resistance, indicating protection against immersion in water. The S21 Ultra uses Gorilla Glass Victus for screen protection, while the S24 FE incorporates Gorilla Glass Victus+.
• Repairability: The Galaxy S21 Ultra 5G received a lower repairability score of 3 out of 10 from iFixit, largely due to extensive use of adhesive for internal components and a non-modular display cable. The Galaxy S24 FE, however, shows improved repairability with a score of 8.5 out of 10, featuring more accessible components like the battery, speakers, and cameras, though screen replacement can still be challenging.

Performance in smartphones is determined by the interplay of processing power, memory, and battery efficiency, impacting daily usage and demanding applications.

• Processing Power: The Galaxy S21 Ultra 5G is equipped with a powerful processor from its generation, enabling smooth handling of demanding applications and multitasking. The Galaxy S24 FE features a more recent generation processor, designed for efficient performance across various tasks, including gaming and video editing, though some users report heating during prolonged heavy gaming.
• Multitasking and Storage: The S21 Ultra 5G offers higher RAM configurations, up to 16GB, which can benefit users who frequently switch between many applications or engage in intensive tasks. The S24 FE typically comes with 8GB of RAM, which is sufficient for most everyday multitasking. Both devices offer various internal storage options, up to 512GB for the S21 Ultra and up to 256GB for the S24 FE, without expandable storage.
• Battery Behavior: The S21 Ultra 5G houses a 5000mAh battery, providing substantial power for a full day of moderate use, though heavy users might find themselves needing to recharge before the day ends. The S24 FE has a 4700mAh battery, which, combined with its efficient processor, aims to offer reliable battery life, with some users reporting it comfortably lasts a full day with normal usage. Both support 25W fast charging.

The visual experience on a smartphone is largely defined by its display technology, resolution, and responsiveness.

• 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 (QHD+), resulting in a very sharp and detailed image. The Galaxy S24 FE comes with a 6.7-inch AMOLED 2X display offering a 1080x2340 pixel (FHD+) resolution, which provides clear and vibrant visuals for general use.
• Brightness and Refresh Rate: Both devices offer a 120Hz adaptive refresh rate, contributing to smooth scrolling and fluid animations. The S21 Ultra's display is HDR10+ certified, enhancing contrast and color reproduction for compatible content. The S24 FE's display is noted for being bright and sharp, suitable for various viewing conditions.
• Viewing Experience: The S21 Ultra 5G's larger, higher-resolution display provides an expansive and immersive viewing experience, particularly beneficial for media consumption and detailed work. The S24 FE offers a slightly smaller screen with a lower resolution, but still delivers a vibrant and smooth visual experience, though some users have noted the presence of thicker bezels.

Camera capabilities are a significant factor for many users, encompassing hardware, software processing, and versatility.

• Rear Camera Systems: The Galaxy S21 Ultra 5G boasts a comprehensive quad-camera setup, including a 108MP main sensor, a 12MP ultrawide, a 10MP telephoto with 3x optical zoom, and a 10MP periscope telephoto with 10x optical zoom, offering extensive photographic flexibility. The Galaxy S24 FE features a triple-camera system with a 50MP primary camera, a 12MP ultrawide, and an 8MP telephoto lens with 3x optical zoom, providing a versatile range for everyday photography.
• Photography Performance: The S21 Ultra 5G is known for its detailed images, strong zoom capabilities, and good low-light performance. The S24 FE delivers detailed photos in most lighting conditions, with its camera quality generally praised for its segment.
• Video Recording and Front Camera: Both devices are capable of recording 8K video, with the S21 Ultra at 24fps and the S24 FE at 30fps. For selfies, the S21 Ultra 5G has a 40MP front camera, while the S24 FE features a 10MP front camera. Some users have noted that the S24 FE's front and ultrawide cameras have fixed focus, which can limit creative options.