Galaxy S21 5G • Unlocked vs Galaxy Z Flip6 • Unlocked

The Samsung Galaxy S21 5G, released in January 2021, and the Samsung Galaxy Z Flip6, launched in July 2024, represent distinct approaches to smartphone design and technology. While the S21 5G offers a traditional slab form factor, the Z Flip6 introduces a foldable clamshell design. These devices operate on the Android platform, with the Z Flip6 benefiting from a more recent operating system and a longer software support commitment from Samsung.

The expected lifespan and software support differ significantly between these two models due to their respective release dates and Samsung's updated support policies.

• Software Longevity: The Galaxy S21 5G, released in early 2021, typically received 4-5 years of major Android operating system updates and 5 years of security updates. In contrast, the Galaxy Z Flip6, launched in mid-2024, benefits from Samsung's extended commitment, promising 7 generations of Android OS updates and 7 years of security updates. This means the Z Flip6 will receive software support for a considerably longer period.
• Physical Durability: The Galaxy S21 5G features a traditional design with a glass front protected by Gorilla Glass Victus, a plastic back, and an aluminum frame, offering IP68 water and dust resistance. The Galaxy Z Flip6, with its foldable design, incorporates an Armor Aluminum frame and Gorilla Glass Victus 2 on its cover screen and back panel. It carries an IP48 rating, providing protection against dust and water immersion. While the Z Flip6's main foldable screen is covered by a PET plastic screen protector that can scratch at lower Mohs levels, its overall repairability score has shown improvements over previous foldable generations, particularly for screen replacement.

Performance capabilities are a key differentiator, largely influenced by the three-year gap in their release cycles.

• Processing Power: The Galaxy S21 5G is equipped with a high-end processor from its release year, enabling smooth handling of everyday applications and multitasking. The Galaxy Z Flip6, featuring a more recent generation processor, delivers enhanced performance for demanding applications, intensive gaming, and complex AI-driven tasks. Users engaging in heavy computational workloads or advanced mobile gaming will likely experience more fluid operation on the Z Flip6.
• Battery Behavior: Both devices feature a 4000 mAh battery capacity. However, the Z Flip6's more efficient processor and optimized software contribute to potentially better battery endurance for typical daily use. The Z Flip6 also includes a vapor chamber cooling system, which helps maintain performance during sustained heavy use by managing heat more effectively.
• Storage and Responsiveness: Both models offer various internal storage options, typically ranging from 128GB to 256GB for the S21 5G and 256GB to 512GB for the Z Flip6. The Z Flip6 generally comes with 12GB of RAM, compared to the S21 5G's 8GB, which can contribute to smoother multitasking and app retention in memory.

The display experience varies significantly, primarily due to the Z Flip6's unique foldable form factor and its more advanced display technology.

• Display Technology and Size: The Galaxy S21 5G features a 6.2-inch Dynamic AMOLED 2X flat display, offering vibrant colors and deep blacks. The Galaxy Z Flip6 boasts a 6.7-inch Foldable Dynamic LTPO AMOLED 2X main display, which can be folded in half. Additionally, the Z Flip6 includes a 3.4-inch Super AMOLED cover display, allowing users to interact with notifications and widgets without unfolding the device.
• Resolution and Refresh Rate: Both devices offer Full HD+ resolution on their main screens, providing clear and sharp visuals for everyday content. Both also feature an adaptive 120Hz refresh rate on their main displays, ensuring smooth scrolling and fluid animations. The Z Flip6's cover screen operates at a 60Hz refresh rate.
• Brightness and Viewing Experience: The Z Flip6's main and cover displays offer higher peak brightness levels compared to the S21 5G, which can improve visibility in bright outdoor conditions. The foldable nature of the Z Flip6 offers a compact form factor when closed, while providing a large screen when unfolded, catering to different usage preferences.

Camera capabilities have seen notable advancements between the two generations, particularly in sensor technology and image processing.

• Rear Camera System: The Galaxy S21 5G features a versatile triple-camera setup with a 12MP wide, 12MP ultrawide, and a 64MP telephoto lens with 3x hybrid optical zoom. The Galaxy Z Flip6 comes with a dual-camera system, including a 50MP wide main sensor and a 12MP ultrawide lens. The Z Flip6's larger main sensor, similar to those found in more recent flagship phones, generally captures more detail and performs better in various lighting conditions.
• Photography Performance: The S21 5G is capable of capturing detailed photos and offers 8K video recording. The Z Flip6 provides improved low-light photography and enhanced image processing, leading to clearer and more vibrant images, especially from its main camera. Both devices feature a 10MP front-facing camera for selfies and video calls.
• Video Recording and Audio: Both phones support 4K video recording, with the S21 5G also offering 8K. The Z Flip6's camera system benefits from newer software enhancements, including AI features, which can optimize video quality and offer creative shooting modes. Both devices provide stereo speaker output for media consumption.