Galaxy S21 Ultra 5G • Unlocked vs Galaxy S23 • Unlocked

The Samsung Galaxy S21 Ultra 5G, released in January 2021, and the Samsung Galaxy S23, launched in February 2023, represent different generations within Samsung's flagship smartphone lineup. While both operate on the Android platform, the S21 Ultra 5G is a larger, more feature-rich device from its era, whereas the S23 offers a more compact form factor with advancements in processing efficiency and camera technology. These differences cater to varying user preferences, from those seeking a comprehensive, larger-screen experience to those prioritizing a modern, streamlined device.

When considering the long-term usability of these devices, their release timelines and software support are key factors.

• Release Timeline: The Galaxy S21 Ultra 5G was released in January 2021, making it an older model compared to the Galaxy S23, which launched in February 2023. This two-year difference impacts the duration of future software support.
• Software Longevity: The Galaxy S21 Ultra 5G is eligible for four years of Android operating system updates, meaning its major OS support will likely conclude around early 2025, having launched with Android 11. The Galaxy S23, launching with Android 13, is also promised four years of OS updates, extending its major software support until approximately early 2027, and five years of security updates. This means the S23 will receive software and security updates for a longer period.
• Repairability: The Galaxy S21 Ultra 5G received a repairability score of 3 out of 10 from iFixit, indicating challenges in disassembly due to the use of strong adhesives and non-modular components. The Galaxy S23 series generally shows improved repairability, with the S23 Ultra receiving a score of 4 out of 10, suggesting a slightly more repair-friendly design for the newer generation.

The performance of a smartphone is largely determined by its internal components, influencing how smoothly apps run and how efficiently power is managed.

• Storage Options: Both devices offer a range of internal storage capacities, typically starting from 128GB and extending to 512GB, providing ample space for applications, media, and documents. The Galaxy S21 Ultra 5G also had a 16GB RAM option, while the Galaxy S23 typically comes with 8GB of RAM.
• Everyday Responsiveness: The Galaxy S23 benefits from a newer, more efficient processor, which translates to faster app loading times, smoother multitasking, and enhanced performance in demanding applications and games. Users transitioning from older devices will likely notice a more fluid and responsive experience with the S23.
• Battery Behavior: The Galaxy S21 Ultra 5G features a larger 5000 mAh battery. In contrast, the more compact Galaxy S23 has a 3900 mAh battery. Despite the S23's smaller capacity, its newer, more power-efficient processor often results in comparable or even better real-world battery life for many users, allowing it to comfortably last a full day with moderate usage.

The display is a primary interface for smartphone interaction, and both models offer high-quality viewing experiences with distinct characteristics.

• Display Technology and Size: Both phones feature Dynamic AMOLED 2X displays, known for vibrant colors and deep blacks. The Galaxy S21 Ultra 5G has a larger 6.8-inch display, offering an expansive viewing area. The Galaxy S23 features a more compact 6.1-inch display, which is preferred by users seeking a smaller, more manageable device.
• Resolution and Clarity: The S21 Ultra 5G boasts a higher QHD+ resolution (3200 x 1440 pixels), providing exceptional sharpness and detail. The S23 has a Full HD+ resolution (2340 x 1080 pixels), which still delivers clear and crisp visuals for everyday use.
• Brightness and Refresh Rate: Both devices offer a 120Hz adaptive refresh rate for smooth scrolling and responsive interactions. The S23 features a higher peak brightness of 1750 nits, improving visibility in bright outdoor conditions, compared to the S21 Ultra 5G's 1500 nits peak brightness.

Both the Galaxy S21 Ultra 5G and the Galaxy S23 offer advanced camera systems, though with different approaches to imaging.

• Main Camera System: The Galaxy S21 Ultra 5G features a versatile quad-camera setup, including a 108 MP main sensor, a 12 MP ultrawide lens, and two 10 MP telephoto lenses (one with 3x optical zoom and another with 10x optical zoom). The Galaxy S23 comes with a triple-camera system, featuring a 50 MP main sensor, a 12 MP ultrawide, and a 10 MP telephoto lens with 3x optical zoom.
• Photography Performance: The S21 Ultra 5G is recognized for its impressive zoom capabilities due to its dual telephoto lenses, offering up to 100x digital zoom. The S23, while having fewer megapixels on its main sensor, benefits from newer sensor technology and improved image processing, leading to enhanced low-light performance and better dynamic range in many scenarios.
• Video Recording and Selfie Camera: Both phones are capable of recording 8K video at 24fps, with the S23 also supporting 8K at 30fps. The S21 Ultra 5G has a high-resolution 40 MP front camera, while the S23 features a 12 MP front camera that often delivers more natural tones and improved clarity.