When the Samsung Galaxy S21 first hit the market in early 2021, it was hailed as a powerful and versatile smartphone with a sleek design, top-tier performance, and an array of innovative features. Fast forward to 2025, and the smartphone market has evolved rapidly, with newer devices boasting advanced processors, superior cameras, and cutting-edge display technologies. So, the question arises: is this four-year-old flagship still a viable choice for buyers today, or should you invest in a more recent model?

Design and Build Quality

One of the standout features of the device is its design. Even in 2025, the S21’s contour-cut rear camera module, combined with its matte finish, offers a premium feel that rivals many modern phones. Its lightweight polycarbonate back, although not as luxurious as glass, ensures durability and reduces the overall weight of the device. With dimensions that make it comfortable to hold in one hand, the S21 remains an ergonomic option for those who prefer a phone that doesn’t feel bulky.

While newer smartphones have embraced under-display fingerprint sensors and thinner bezels, the S21’s 6.2-inch display continues to feel substantial without being cumbersome. Its flat display design, compared to curved alternatives in more recent models, may appeal to users who dislike accidental touches or prefer a classic screen layout.

Display Performance

The Samsung Galaxy S21 features a Dynamic AMOLED 2X panel with Full HD+ resolution and a 120Hz refresh rate. In 2025, flagship displays have seen improvements in peak brightness, HDR support, and color accuracy, yet the S21’s screen remains remarkably vibrant and sharp. Streaming videos, gaming, or scrolling through social media feels fluid thanks to its high refresh rate, and the color reproduction still impresses with deep blacks and vivid tones.

While the maximum resolution is lower than some of today’s premium devices that offer QHD+ panels, the difference is barely noticeable in everyday use. Additionally, the adaptive refresh rate feature, which dynamically adjusts the display refresh based on content, helps conserve battery life—a feature that remains relevant for modern smartphone users.

Performance and Software

Equipped with either the Exynos 2100 or Snapdragon 888, depending on the region, the S21 was built for speed and efficiency. In 2025, these processors are no longer cutting-edge, yet the device handles daily tasks like messaging, browsing, and streaming with ease. Light gaming is smooth, though high-end 3D games at maximum settings may experience occasional frame drops compared to newer chipsets.

Software-wise, the S21 launched with Android 11 and Samsung’s One UI skin. As of now, it still receives security updates, although major OS updates may no longer be guaranteed. For users who prioritize a stable and intuitive interface, the One UI experience remains one of the best in the Android ecosystem. Features like split-screen multitasking, Samsung DeX compatibility, and enhanced customization options still offer a modern user experience.

Camera Capabilities

The S21 sports a triple-camera setup: a 12MP main sensor, a 12MP ultra-wide lens, and a 64MP telephoto sensor. While flagship cameras in 2025 may feature higher megapixels, improved AI processing, and advanced computational photography, the S21 continues to deliver excellent results. Daylight photography is sharp and vibrant, with accurate color reproduction. Low-light performance, while not as impressive as newer models with enhanced night modes, still captures usable images without excessive noise.

Video recording on the S21 remains competitive. The device supports 8K video at 24fps and 4K at 60fps, which was revolutionary at its release. In practical use, 4K video recording is smooth, with solid stabilization and good dynamic range. Social media enthusiasts and content creators will find the camera system adequate, though power users may notice limitations in ultra-low-light scenarios.

Battery Life and Charging

Battery longevity is always a concern with older smartphones. The S21 comes with a 4000mAh battery, capable of comfortably lasting a full day with moderate use. In 2025, battery capacities in new devices have increased slightly, but the S21 remains competitive, especially when paired with its efficient processors and adaptive display features.

Charging speeds are adequate but not groundbreaking. Wired charging supports up to 25W, while wireless charging maxes out at 15W. Though some modern phones can recharge fully in 30–40 minutes, the S21’s charging times are reasonable for users who plan their daily usage efficiently. For those who don’t mind slightly slower charging, it’s a minor compromise considering the device’s overall reliability.

Connectivity and Extras

The S21 offers 5G support, Wi-Fi 6, and Bluetooth 5.0, ensuring that it remains future-proof for most connectivity needs. It also features an IP68 rating for water and dust resistance, a feature that enhances its durability. While some contemporary smartphones have introduced under-display fingerprint sensors and improved biometric options, the S21’s side-mounted sensor remains fast and accurate.

One notable omission is the lack of expandable storage. With internal storage options ranging from 128GB to 256GB, users must carefully consider their storage needs. Cloud solutions can mitigate this limitation, but those who prefer physical storage expansion might find this inconvenient.

Price and Value

In 2025, the price of the Samsung Galaxy S21 has dropped significantly, making it an attractive choice for budget-conscious buyers seeking a reliable flagship experience without paying for the latest premium devices. Compared to newer models that may cost double, the S21 offers a balanced mix of performance, camera quality, and design at a fraction of the cost.

For buyers who want a solid smartphone for everyday use—browsing, social media, streaming, casual gaming—the S21 delivers strong value. It may not compete with the latest high-end devices in raw performance or camera innovation, but it remains a dependable option that avoids the rapid depreciation of newer models.

Should You Buy It in 2025?

Deciding whether to purchase the Samsung Galaxy S21 today depends largely on your priorities. If having the latest features, highest resolution camera, and cutting-edge performance is crucial, you may want to consider newer devices. However, if you value reliability, a high-quality display, good battery life, and a capable camera system at a lower price point, this device still stands as a strong contender.

The S21’s design remains stylish, its performance adequate for most tasks, and its software experience continues to be polished. For users upgrading from older models like the S10 or S20, the jump in performance and camera quality is noticeable and satisfying. Moreover, the reduced cost compared to newer devices makes it a smart choice for those who want flagship quality without breaking the bank.

Conclusion

The Samsung Galaxy S21 may no longer be the newest or most powerful smartphone on the market, but it continues to deliver a well-rounded experience even in 2025. Its solid design, vibrant display, capable camera system, and dependable software make it a viable option for buyers seeking value and reliability. While it won’t match the performance of the latest flagship devices, it offers enough features to meet the needs of most users without the premium price tag.

In summary, for anyone looking for a balance of quality, performance, and affordability, the Samsung Galaxy S21 remains a commendable choice. Its legacy as a top-tier smartphone is evident, and even four years after its initial release, it proves that a well-designed device can stand the test of time.