Galaxy S21 Ultra 5G Vs Galaxy S21+ 5G

The Samsung Galaxy S21 Ultra 5G and the Samsung Galaxy S21+ 5G, both released in January 2021, are flagship smartphones from the same generation. While they share a common operating system foundation with Android 11 and Samsung's One UI 3.1, they cater to slightly different user needs. The S21 Ultra distinguishes itself with a more advanced camera system, a higher-resolution display, and S Pen compatibility, whereas the S21+ offers a slightly more compact form factor and a streamlined feature set.

Both the Galaxy S21 Ultra 5G and the Galaxy S21+ 5G were launched in January 2021, placing them on the same timeline for software support and overall longevity. Samsung initially committed to providing four major Android operating system updates and five years of security updates for the S21 series.

• Software Updates: Both devices received their final major Android OS update, Android 15-based One UI 7.0, in May 2025. As of February 2026, regular software updates, including security patches, have been terminated for both models.
• Repairability: The Galaxy S21 Ultra received a repairability score of 3 out of 10 from iFixit, indicating a challenging repair process. This is largely due to the extensive use of adhesive for components like the battery, display, and rear panel, as well as a non-modular display cable. The S21+ also features a glass back and similar construction methods, suggesting a comparable level of repair difficulty.
• Practical Lifespan: Given that software and security updates have concluded as of early 2026, the practical lifespan for users who prioritize the latest features and security patches has largely ended. However, both devices are built with durable materials, including Gorilla Glass Victus on the front and glass backs, and feature IP68 dust and water resistance, contributing to their physical resilience.

Both the Galaxy S21 Ultra 5G and the Galaxy S21+ 5G are equipped with the same generation of powerful processors, ensuring a consistent baseline for handling various tasks, from everyday applications to more demanding operations.

• Processing Power: Both devices deliver smooth performance for daily use, including app loading, web browsing, and general navigation. They handle multitasking efficiently, allowing users to switch between applications without significant slowdowns. For mobile gaming and intensive applications, both phones provide a responsive experience.
• Memory Options: The Galaxy S21 Ultra 5G offers more generous memory configurations, with options for 12GB or 16GB of RAM. The Galaxy S21+ 5G comes with 8GB of RAM. This difference means the Ultra model may maintain more applications in active memory simultaneously, potentially offering a smoother experience for users who frequently juggle many demanding apps.
• Storage Capacity: Both models are available with 128GB and 256GB of internal storage. The Galaxy S21 Ultra 5G also provides an additional 512GB storage option, catering to users with extensive storage needs for photos, videos, and large applications. Neither device supports expandable storage via a microSD card.

The display is a key area where the Galaxy S21 Ultra 5G offers a more advanced visual experience compared to the Galaxy S21+ 5G, particularly in terms of resolution and adaptive refresh rate range.

• Display Technology and Size: Both phones feature vibrant Dynamic AMOLED 2X displays, known for deep blacks and rich colors. The Galaxy S21 Ultra 5G has a larger 6.8-inch display, while the Galaxy S21+ 5G features a 6.7-inch display. The Ultra's display also has subtly curved edges, whereas the Plus model has a flat screen.
• Resolution and Clarity: The S21 Ultra 5G boasts a higher resolution of 3200 x 1440 pixels (WQHD+), resulting in a sharper image with 515 pixels per inch (ppi). The S21+ 5G has a resolution of 2400 x 1080 pixels (FHD+), with 394 ppi. While both offer clear visuals, the Ultra provides noticeably finer detail, especially when viewing high-resolution content or small text.
• Brightness and Refresh Rate: Both displays offer an adaptive refresh rate of up to 120Hz, providing smooth scrolling and fluid animations. The S21 Ultra's display can dynamically adjust its refresh rate down to 10Hz to conserve power, while the S21+ goes down to 48Hz. The S21 Ultra also achieves a higher peak brightness of 1500 nits, making it more visible in bright outdoor conditions compared to the S21+.

The camera systems are a significant differentiator between these two devices, with the Galaxy S21 Ultra 5G featuring a more versatile and advanced setup designed for photography enthusiasts.

• Rear Camera Configuration: The Galaxy S21 Ultra 5G is equipped with a quad-camera system, including a high-resolution 108MP main sensor, a 12MP ultrawide lens, and two 10MP telephoto lenses (one with 3x optical zoom and another with 10x optical zoom). This dual-telephoto setup allows for superior long-range photography, supporting up to 100x digital 'Space Zoom'. The Galaxy S21+ 5G features a triple-camera system with a 12MP main sensor, a 12MP ultrawide lens, and a 64MP telephoto lens that offers 3x hybrid optic zoom.
• Photography Performance: The S21 Ultra's 108MP main sensor captures highly detailed images, especially in good lighting, and its advanced processing contributes to better low-light performance. The dual telephoto lenses provide clearer and more usable zoomed-in shots. While the S21+ delivers good everyday photos and video, its zoom capabilities are more limited, and its low-light performance is generally good but can struggle more in very dim conditions compared to the Ultra.
• Front Camera and Video: For selfies and video calls, the Galaxy S21 Ultra 5G features a 40MP front camera, offering higher resolution and detail. The Galaxy S21+ 5G has a 10MP front camera. Both devices are capable of recording video at up to 8K resolution at 24 frames per second, as well as 4K at 30 or 60 frames per second, providing high-quality video capture for various needs. Both also feature stereo speakers for an immersive media consumption experience.