Galaxy S21 FE 5G vs Galaxy Z Fold4

The Samsung Galaxy S21 FE 5G and the Samsung Galaxy Z Fold4 represent distinct approaches to smartphone design and functionality. Released in January 2022, the Galaxy S21 FE 5G offers a traditional smartphone experience, while the Galaxy Z Fold4, launched in August 2022, introduces a foldable form factor that transforms from a compact phone into a larger tablet-like display. The primary difference lies in their physical design and the resulting user interaction, with the Z Fold4 prioritizing screen real estate and multitasking capabilities, and the S21 FE focusing on a conventional, streamlined experience. Both devices operate on the Android platform, offering a familiar software environment.

When considering the longevity of these devices, their release timelines and software support policies are key factors.

• Release Timeline & OS Support: The Galaxy S21 FE 5G was released in January 2022, while the Galaxy Z Fold4 followed in August 2022. Both devices are part of Samsung's commitment to providing four major Android OS updates and five years of security updates from their respective launch dates. This means the Z Fold4 will receive software support for approximately eight months longer than the S21 FE 5G.
• Software Longevity Expectations: As of early 2026, the Galaxy Z Fold4 is still receiving current security updates, with March 2026 updates rolling out. The S21 FE 5G has also received updates up to Android 14. Users can expect both devices to remain functional and secure for several years, though the Z Fold4 has a slight edge due to its later release.
• Repairability & Practical Lifespan: The Galaxy S21 FE 5G features an IP68 rating for dust and water resistance, offering robust protection against environmental elements. The Galaxy Z Fold4, while water-resistant with an IPX8 rating, does not carry an official dust resistance rating due to its folding mechanism. The complex hinge and foldable display of the Z Fold4 introduce unique durability considerations, with some user reports on forums mentioning concerns about inner screen protector longevity and potential issues with the folding mechanism over extended use. For those seeking a quality-assured refurbished option, understanding these design differences is important for long-term satisfaction.

The performance of these two devices is influenced by their internal components, impacting daily responsiveness and handling of demanding applications.

• Processor Capabilities: The Galaxy S21 FE 5G is equipped with a processor that handles everyday tasks and most applications smoothly, providing a responsive user experience for general navigation, social media, and moderate gaming. The Galaxy Z Fold4 features a newer generation processor, which offers enhanced processing power and improved efficiency. This translates to faster app loading times, smoother transitions during multitasking, and a more consistent performance during graphically intensive gaming sessions.
• Multitasking & Responsiveness: The Galaxy S21 FE 5G typically comes with 6GB or 8GB of RAM, which is sufficient for running multiple applications simultaneously without significant slowdowns. The Galaxy Z Fold4, with its 12GB of RAM, provides more headroom for extensive multitasking, particularly when utilizing its larger inner display for split-screen applications or running several demanding apps concurrently. This higher RAM capacity contributes to a more fluid and uninterrupted workflow.
• Storage Options & Battery Behavior: Both devices offer various internal storage configurations, ranging from 128GB to 256GB for the S21 FE 5G, and 256GB up to 1TB for the Z Fold4, without expandable storage via microSD cards. The Galaxy S21 FE 5G has a 4500mAh battery, generally providing a full day of use for average users, though heavy usage may require an evening charge. The Galaxy Z Fold4, with a 4400mAh battery, benefits from a more power-efficient processor and display technology, leading to generally good battery life, with some users reporting around 13 hours of usage.

The display experience is a significant differentiator, with the Galaxy Z Fold4 offering a unique dual-screen setup compared to the traditional single screen of the Galaxy S21 FE 5G.

• Display Technology & Clarity: Both devices feature Dynamic AMOLED 2X displays, known for vibrant colors, deep blacks, and excellent contrast. The Galaxy S21 FE 5G has a 6.4-inch display with a resolution of 2340 x 1080 pixels (FHD+), providing a clear and sharp viewing experience for typical smartphone use. The Galaxy Z Fold4 offers a 6.2-inch cover display and a larger 7.6-inch foldable inner display. The inner display boasts a higher resolution of 2176 x 1812 pixels (QXGA+), delivering exceptional clarity and detail, especially beneficial for content consumption and productivity.
• Brightness & Refresh Rate: Both phones support a 120Hz refresh rate, ensuring smooth scrolling and fluid animations. The Galaxy S21 FE 5G's display offers good brightness levels for outdoor visibility. The Galaxy Z Fold4's displays also provide high brightness, with the adaptive refresh rate on both screens contributing to power efficiency while maintaining visual smoothness.
• Screen Size & Viewing Experience: The Galaxy S21 FE 5G provides a comfortable and immersive viewing experience for a standard smartphone. The Galaxy Z Fold4's dual-screen setup offers versatility; the cover screen functions as a regular smartphone display, while unfolding reveals a much larger, tablet-like canvas. This larger screen is particularly advantageous for multitasking, reading, and media consumption, offering a more expansive and engaging visual experience.

Both devices offer capable camera systems, but the Galaxy Z Fold4 introduces notable enhancements and unique shooting modes.

• Camera System Capabilities: The Galaxy S21 FE 5G features a versatile triple-camera setup on the rear, including a 12MP wide, a 12MP ultrawide, and an 8MP telephoto lens with 3x optical zoom. The Galaxy Z Fold4 also has a triple-camera system, but with an upgraded 50MP wide main sensor, a 12MP ultrawide, and a 10MP telephoto lens with 3x optical zoom. The Z Fold4's main sensor is shared with other flagship devices, indicating a higher-tier imaging capability.
• Photography Performance: The S21 FE 5G delivers vibrant and detailed photos in good lighting conditions, with its main camera producing social media-ready images. Its telephoto lens offers up to 30x digital zoom. The Z Fold4 shows improved performance in both day and low-light conditions, with better detail and dynamic range, especially from its main 50MP sensor. The Z Fold4 also benefits from Samsung's AI-powered depth mapping for portrait modes.
• Video Recording & Selfie Cameras: Both devices can record 4K video at 60 frames per second from their main and front cameras. The Galaxy Z Fold4 further supports 8K video recording at 24 frames per second. For selfies, the S21 FE 5G has a 32MP front camera. The Z Fold4 has a 10MP camera on its cover display and a 4MP under-display camera on the inner screen, which is primarily intended for video calls rather than high-quality photography. The Z Fold4's foldable design also enables unique shooting angles and the use of the main cameras for high-quality selfies with the cover screen as a viewfinder.