9.2 / 10.0

Samsung Galaxy S21 Ultra 5G SM-G998U1 128GB 256GB 512GB Unlocked Very Good Review

Published October 16, 2025 • 8 min read • 4 views

Overview

The Samsung Galaxy S21 Ultra 5G is a premium smartphone that combines powerful performance, advanced camera features, and sleek design. This unlocked version offers flexibility across global networks, making it an excellent choice for those seeking top-tier mobile technology.

What's In The Box

  • Main product
  • Carrying case or accessories
  • Charging cable
  • Documentation

Technical Specifications

Operating System Android
Display Size 6.8 inches
Resolution 3200 x 1440 pixels
Processor Exynos/Qualcomm Snapdragon, depending on region
RAM 12GB or 16GB
Rear Cameras 108MP + 10MP + 10MP

Design & Build Quality

The Samsung Galaxy S21 Ultra 5G boasts a premium build quality with its glass back and metal frame, providing both durability and aesthetics. The phone's design is sleek, with curves that fit comfortably in the hand despite its large size. However, it can be prone to fingerprints due to its glass construction.

Performance

The S21 Ultra 5G delivers outstanding performance whether you're browsing social media or running demanding apps like games and video editing software. Its processor handles multitasking effortlessly, ensuring a smooth user experience throughout the day. One notable issue is the occasional touch screen unresponsiveness that requires restarting to fix.

Key Feature Analysis

The camera system in the S21 Ultra 5G is exceptional, with its multi-lens setup capable of capturing stunning photos and videos in various lighting conditions. The battery life holds up well but can be shortened by heavy usage of features like 4K video recording. Overall, it's a feature-rich device that caters to tech enthusiasts.

Durability

This phone is built to last with its glass and metal construction, though it may require protective cases due to the fragility of these materials. The battery life is solid but can be improved for users who demand extended usage without frequent charging sessions.

Pros & Cons

Pros

  • Top-notch camera quality
  • Powerful performance
  • Sleek design and build quality
  • Flexibility with unlocked version
  • Advanced features like S Pen support

Cons

  • Occasional touch screen unresponsiveness
  • Battery life can be better for heavy users
  • Cost is relatively high compared to competitors
  • Fingerprints are noticeable on the glass back and front
  • Bulkiness might not suit everyone

Final Verdict

The Samsung Galaxy S21 Ultra 5G is a powerful smartphone that excels in its camera performance, design quality, and overall features. Despite minor issues with touch responsiveness and battery life, it's still an excellent choice for those willing to pay premium prices.

Who should buy: Tech enthusiasts who value top-tier mobile technology and photography capabilities

Who should skip: Users looking for a budget-friendly option or those prioritizing long battery life over performance

9.2/10
Samsung Galaxy S21 Ultra 5G SM-G998U1 128GB 256GB 512GB Unlocked Very Good Review

Where To Buy

$234.99

Samsung Galaxy S21 Ultra 5G SM-G998U1 128GB 256GB 512GB Unlocked Very Good

Prices may vary

Ready to Buy?

$234.99

Prices may vary by retailer and configuration