Samsung Galaxy S21 SIM-Free 128GB Phantom Gray

Buy Samsung Galaxy S21 for Sale – Get the Best Price (UK)

Certified Refurbished Samsung Galaxy S21 (UK) with 85%+ battery health, 12-month warranty. Best online prices - limited-time deals.✅ SIM-Free & Unlocked – choose any UK network ✅ Fast, Free UK Delivery ✅ Trusted Since 1999

The Galaxy S21: Compact Power in Your Pocket

The Samsung S21 5G is built for speed, style, and ease. Powered by Exynos 2100 chip technology, this phone gives you smooth gaming, sharp photos, and reliable all-day use.

Unlike the Ultra models, the S21 has a lightweight plastic back—but don’t be fooled. It’s still packed with top features, including a triple-lens camera (12MP main, 12MP ultra-wide, and 64MP telephoto), a bright AMOLED screen with a cutting-edge display, and long battery life.

Available in 128 GB and 256 GB storage options, the Galaxy S21 has enough space for all your apps and videos.

Why Buy the Samsung S21 5G?

• Compact 6.2” AMOLED Display – sharp, colourful, and smooth with 120Hz refresh rate and high contrast

• Triple-Camera System – 64MP telephoto + 12MP wide + 12MP ultra-wide

• Night Mode + 30x Space Zoom – capture clear shots in any light with super resolution zoom

• 8K Video Recording – cinema-quality video in your pocket. Stereo sound recording is supported for high-quality audio

• Huge Battery – all-day power with fast + wireless charging. A battery charge that adapts to your usage

• Wireless PowerShare – charge other compatible devices

• Durable Build – Gorilla Glass Victus + reinforced aluminium

• Dual SIM Support – perfect for work and travel

Why Shop at The Big Phone Store for the best deals?

• Best UK prices – updated daily

• Fully tested & certified phones

• SIM-free & unlocked – total network freedom

• 12-month warranty on every device

• Eco-friendly packaging + recycling incentives

• UK-based customer support since 1999

• 4.7/5 Trustpilot rating from real buyers

What’s in the Box?

• Samsung Galaxy S21 5G handset

• USB-C charging cable

• SIM eject tool (if needed)

• Secure, eco-friendly packaging

(Charger sold separately – available at checkout.)

Design and Display

The 6.2-inch AMOLED 2X screen features high contrast colours and sharp detail. This advanced display technology adjusts brightness outdoors so you can see clearly even in bright light.

Made with Gorilla Glass Victus and reinforced materials, the S21 5G is tough enough for daily use.

Camera Power

The advanced rear camera system, featuring cutting-edge camera technology, is designed for fantastic photos.

• 64MP telephoto with 3x hybrid zoom and super resolution zoom for high-quality digital zoom up to 30x, allowing you to capture distant subjects.

• 12MP wide + 12MP ultra-wide for group shots and sweeping views

• 10MP selfie camera for sharp front shots

• 8K video recording + HDR so you can capture epic video moments with cinematic quality.

• Stereo sound recording for higher-quality audio

• Night Mode so shots stay clear even after dark.

Performance and Battery

The Exynos 2100 processor uses advanced processing technology to keep everything fast and smooth. Switch apps, play games, or stream—it handles it with ease.

The 4000mAh adaptive battery learns your habits to save power, and battery life may vary depending on usage. It supports fast charging, wireless charging, and PowerShare for charging other devices, with all these charging methods supported. Regular software updates improve performance and security.

Explore More S21 Deals

Prefer a bigger or more advanced model? Check out:

• Galaxy S21 Ultra 5G – Pro cameras + S Pen support. See the product page for full details, including current stock status. Expert reviews highlight its advanced features and performance.

• Galaxy S21 Plus 5G – Bigger screen + larger battery. Visit the product page for up-to-date stock information and specs. Certain storage or colours may be limited.

• Galaxy S21 FE 5G – Flagship feel for less. See the product page for availability and details.

The S21 series sets the stage for future Galaxy S models, introducing epic features and innovations that will continue in upcoming devices.

Want to save even more?

At The Big Phone Store, we don't believe in monthly payments and contracts that cost a fortune in the long run. That's why we offer outright purchases or interest-free monthly payments with Klarna and Clearpay to make your purchase more manageable.

Still not enough? You can trade in to save even more money. Our trade programs are available to help reduce your upgrade cost. Simply trade in your device with us and put the money towards your next device, reducing the bill even further!

Don't Delay!

The S21 5G is a compact flagship that doesn’t compromise. With its sharp display, pro-grade camera, 5G speeds, and all-day battery, it’s perfect for users who want power and then some!

Order now from The Big Phone Store and get the best UK deals, fast delivery, and a 12-month warranty.