Revisiting the Samsung Galaxy S21 Ultra The Ultimate Mid-Range 5G Smartphone In 2025

The Samsung Galaxy S21 Ultra was a groundbreaking smartphone upon its release in early 2021. With cutting-edge features and incredible camera technology, it set new benchmarks in the flagship category. Now, in 2025, we revisit this classic to explore its legacy, value as a used device, and how it holds up in today’s rapidly evolving tech landscape.

A Legacy of Specifications (2021)

Processor: Exynos 2100/Snapdragon 888 (region-dependent)
Display: 6.8-inch Dynamic AMOLED 2X, QHD+ resolution, 120Hz refresh rate
Cameras: Quad-camera setup (108MP main, 12MP ultra-wide, 10MP telephoto, 10MP periscope telephoto)
Battery: 5000mAh with 25W fast charging
Storage & RAM: Up to 16GB RAM, 512GB storage
Software: One UI 3.1 on Android 11 (upgradable to Android 13; limited updates in 2025)

Note: These specifications provide a historical context and highlight how advanced the S21 Ultra was at its launch.

Design and Build Quality: A Classic That Holds Its Own

The Galaxy S21 Ultra still feels premium in 2025 with its robust aluminum frame and Gorilla Glass Victus back. Despite its large size (165.1 x 75.6 x 8.9 mm) and weight (228g), the phone remains an excellent example of elegant design and thoughtful ergonomics.

Pros:

Aged gracefully with a smooth matte finish.
Robust durability thanks to Gorilla Glass Victus.

Cons:

Slippery without a case.
Large camera bump affects flat-surface stability.

Verdict: A design that reflects classic cues of its time while offering a robust and premium feel. However, newer design trends like flatter edges and compact builds might appeal more to modern users.

Display: A Visual Benchmark of Its Era

The 6.8-inch Dynamic AMOLED 2X display with QHD+ resolution (3200 x 1440 pixels) was ahead of its time in 2021. In 2025, it still offers an enjoyable viewing experience but is outclassed by newer technologies such as LTPO 2.0 and higher peak brightness levels.

Key Features:

QHD+ and 120Hz: Rare for its release year, this combination offers smooth scrolling and sharp visuals.
Brightness: Peak brightness levels of 1500 nits ensure good outdoor visibility.

Drawbacks:

Battery drain when using QHD+ at 120Hz.
Newer displays offer even better efficiency and color accuracy.

Verdict: While surpassed by modern innovations, the S21 Ultra’s display remains vibrant and pleasing for most tasks.

Performance: Still Capable for Everyday Use

Powered by the Exynos 2100 or Snapdragon 888, the Galaxy S21 Ultra can handle general tasks and light gaming in 2025. However, demanding applications and multitasking reveal its age compared to newer processors.

Real-World Performance:

Sufficient for browsing, streaming, and casual gaming.
Noticeable slowdowns with resource-heavy apps or multitasking.

Verdict: Suitable for light to moderate users, but not ideal for power users seeking cutting-edge speed.

Camera: Pioneering Features That Still Impress

The S21 Ultra’s quad-camera setup, particularly its 108MP main sensor and 100x Space Zoom, remains a standout feature even today. Its innovations paved the way for periscope zoom lenses and advanced image processing in later smartphones.

Key Features:

108MP Main Sensor: Produces detailed and vibrant images.
Periscope Zoom: A groundbreaking feature that became a standard for flagships.
Night Mode: Effective for low-light photography, though newer phones handle noise better.

Drawbacks:

Slower image processing compared to newer phones.
Limited AI advancements for post-processing.

Verdict: A capable camera system that highlights its influence on smartphone photography trends.

Battery Life and Software: Challenges of Time

With a 5000mAh battery, the S21 Ultra was designed for endurance. However, battery degradation is inevitable after four years, and software updates have reached their end.

Challenges:

Battery Health: Likely diminished capacity; replacement may be necessary.
Software Updates: Limited security patches after 2025 pose potential risks.

Environmental Note: Extending the life of devices like the S21 Ultra contributes positively to reducing e-waste.

Verdict: Manageable for basic use, but long-term reliability may require maintenance.

The S21 Ultra in 2025: A Practical Value Proposition

For those seeking a used or refurbished smartphone, the Galaxy S21 Ultra offers solid features at a significantly reduced cost. Its premium design and strong camera performance make it an attractive option for budget-conscious buyers.

Considerations:

Battery Replacement: Check the device’s battery health.
Security Updates: Be cautious of outdated software vulnerabilities.
Pricing: Ensure fair market value on used marketplaces.

Verdict: A valuable option for those prioritizing build quality and legacy features over cutting-edge performance.

FAQs: What to Know About the S21 Ultra in 2025

Where can I buy a used S21 Ultra?

Refurbished models are available on platforms like Amazon Renewed, Swappa, and eBay.

What should I look for when buying a used S21 Ultra?

Check for:

Battery health and replacement history.
Screen condition and functionality.
Camera performance and lens clarity.
Device compatibility with your carrier.

What about replacement parts?

Replacement parts like batteries and screens are available through authorized repair centers and online retailers. Ensure compatibility before purchasing.

Is the S21 Ultra still worth it?

Yes, for users seeking a high-quality device at a lower cost. However, alternatives should be considered for those requiring advanced performance or extended software support.

Conclusion: Revisiting a Milestone

The Samsung Galaxy S21 Ultra remains a testament to Samsung’s innovation. In 2025, it offers a glimpse into past flagship excellence, with its standout design, camera, and display still holding appeal. While it faces challenges due to age, its value as a used device cannot be overlooked.

Explore used and refurbished Samsung Galaxy S21 Ultra options today and rediscover this milestone in smartphone history!