Samsung Galaxy S21 5G G991B 256GB Dual Sim GSM Unlocked Android Smartphone (International Variant/US Compatible LTE) - Phantom White
Samsung Galaxy S21 5G G991B 256GB Dual Sim GSM Unlocked Android Smartphone (International Variant/US Compatible LTE) - Phantom White
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Samsung Galaxy S21 5G G991B 256GB Dual Sim GSM Unlocked Android Smartphone (International Variant/US Compatible LTE) - Phantom White

4.1 stars out of 603 reviews
(4.1)|
603 ratings

Key item features

  • Vibrant Display: Features a 6.2-inch Dynamic AMOLED 2X display with Corning Gorilla Glass Victus and a resolution of 1080 x 2400 pixels.
  • Robust Performance: Powered by Android 11 with One UI 3.1, an Exynos 2100 octa-core processor, and Mali-G78 MP14 GPU, alongside 8GB RAM and 256GB storage.
  • Versatile Cameras: Equipped with a triple main camera system (64 MP + 12 MP + 12 MP) with LED flash and auto-HDR, plus a 10 MP selfie camera with dual video call and auto-HDR.
  • Efficient Battery: Includes a non-removable 4000 mAh Li-Ion battery with 25W fast charging, 15W fast Qi/PMA wireless charging, and 4.5W reverse wireless charging.
  • Integrated Security: Incorporates a defense-grade security platform with Samsung Knox, Knox Vault for protecting sensitive data, and biometric authentication.
  • Business Connectivity: Supports secure collaboration with Samsung DeX for mobile-to-desktop transitions and seamless integration with Microsoft Office, OneDrive, and Teams.
  • Compact Design: Measures 5.97 x 2.80 x 0.31 inches and weighs 5.96 ounces, offering a portable form factor.
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Current price is $599.00
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Customer ratings & reviews

4.1 out of 5 stars
stars603 ratings554 reviews
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Reviews summary

Neutral
  • : Captures high-quality images, but struggles in low-light conditions.
  • : Can be fast, but inconsistent across users and chargers.
Cons
  • : Battery drains faster than expected, requiring frequent recharging.
  • : Sensor may not work consistently.
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Showing 1-3 of 554 reviews

Sep 24, 2025
21phone
5 out of 5 stars review

Great phone

Really like this phone. Some great tools e.g. the sleep mode with alarm

International review
Review from Samsung UK
Helpful?4ZV3YIQCDFSP917743436
reply from CX

We’re thrilled to read your thoughts and feedback. Thanks for sharing with us and giving us top marks! ^KF at Samsung Support

Mar 1, 2021
BondC
5 out of 5 stars review

Fantastic upgrade, amazing Camera

I've upgraded from the S8, so was a bit hesitant at losing the curved edge but honestly its not detracted at all. The screen quality is still fantastic, and watching films look incredibly bright and vivid. Camera is superb, and 4k video recording is great. The image stabilisation feature is a new addition but really brings your videos to life. Can see this being super helpful for those that do content creation. I'm so happy I took the plunge and bought it outright, was about time! If your thinking of buying, make use of the 14 day cooling off period and keep all boxes, packaging etc.

International review
Review from Samsung UK
Helpful?4ZV3YIQCDFSP917743436
Jun 28, 2025
Belin
5 out of 5 stars review

Samsung Galaxy S21

I love my Samsung galaxy 21, it's everything I wanted

International review
Review from Samsung UK
Helpful?4ZV3YIQCDFSP917743436