Samsung Galaxy S21 128GB 8GB RAM SM-G991U GSM Fully Unlocked World Smartphone

Samsung Galaxy S21 128GB 8GB RAM Price: $239.99  

The Samsung Galaxy S21 SM-G991U is an exceptional smartphone that perfectly balances cutting-edge technology with sleek design. For those seeking the freedom and flexibility that come with a fully unlocked device, the Galaxy S21 at Instawireless is an unparalleled choice. Available for just $239.99, reduced from its original price of $699.99, this deal offers incredible value for a high-end smartphone. This comprehensive article delves into the features, benefits, and reasons why the Samsung Galaxy S21 is an outstanding purchase, especially from Instawireless, the online unlocked smartphone marketplace.

Samsung Galaxy S21 128GB 8GB RAM SM-G991U GSM Fully Unlocked World Smartphone

Overview of Samsung Galaxy S21 SM-G991U

The Samsung Galaxy S21 SM-G991U is part of Samsung’s flagship lineup, known for its powerful performance, advanced camera capabilities, and seamless user experience.

  • Display:2-inch Dynamic AMOLED 2X, Full HD+ (2400 x 1080), 120Hz refresh rate.
  • Processor: Snapdragon 888 (USA) Exynos 2100 (International).


Storage 128GB

  • Camera: 10MP front camera Triple rear camera setup –64MP (Telephoto) 12MP (Wide) 12MP (Ultra-Wide).
  • Battery:, 15W wireless charging, 4000mAh with 25W fast charging and reverse wireless charging.
  • Operating System: upgradable to later versions Android 11.
  • Connectivity: 5G, LTE, Wi-Fi 6, Bluetooth 5.0.
  • Build: aluminum frame Gorilla Glass Victus front and back,.
  • Other Features: In-display fingerprint sensor, IP68 water and dust resistance, Samsung DeX support.

Stunning Display and Design

Dynamic AMOLED 2X Display

The Samsung Galaxy S21 boasts a 6.2-inch Dynamic AMOLED 2X display that offers vibrant colors, deep blacks, and stunning clarity. With a Full HD+ resolution of 2400 x 1080 pixels and a pixel density of approximately 421 PPI, the visuals are sharp and crisp. The 120Hz refresh rate ensures smooth scrolling and an enhanced gaming experience, making it perfect for both work and play.

Sleek and Durable Design

The Galaxy S21 is designed to withstand the rigors of daily use Constructed with a Gorilla Glass Victus front and back. The aluminum frame adds a touch of elegance and robustness, ensuring the phone feels premium in hand. Allowing users to choose one that best suits their style The device is available in several attractive colors.

Performance Powerhouse

Advanced Processor

The Galaxy S21 is powered by the Exynos 2100 chipset for international versions and the Snapdragon 888 for the USA market. Both processors are built on a 5nm process, ensuring efficient performance and power consumption. Whether you’re multitasking, gaming, or streaming, the Galaxy S21 handles it all with ease.

Ample RAM and Storage

Responsive performance With 8GB of RAM, the Galaxy S21 provides smooth. The 128GB of internal storage ensures you have ample space for apps, photos, videos, and more. While there is no microSD card slot, the built-in storage should suffice for most users.

Exceptional Camera System

Triple Rear Camera Setup

The Samsung Galaxy S21 features a versatile triple camera setup on the rear

  • 12MP Wide Camera: With a large f/1.8 aperture, Dual Pixel autofocus, and optical image stabilization (OIS), this primary camera captures stunning photos in various lighting conditions.
  • 64MP Telephoto Camera: Offers 3x hybrid optical zoom and up to 30x digital zoom, allowing you to get closer to your subject without losing detail.
  • 12MP Ultra-Wide Camera: With a 120-degree field of view, this camera is perfect for capturing expansive landscapes and group photos.

Pro-Grade Features

The camera system supports 8K video recording, ensuring you can capture every moment in the highest resolution available on a smartphone. The Super Steady mode provides gimbal-like stability for video recording, making it ideal for action shots.

Advanced Selfie Camera

The 10MP front-facing camera, , ensures your selfies are always on point with an f/2.2 aperture. Features like portrait mode, AI enhancements, and 4K video recording make it perfect for vlogging and video calls.

Long-Lasting Battery Life

Efficient Power Management

The 4000mAh battery in the Galaxy S21 ensures you get through your day without constantly searching for a charger. Extending battery life even further the adaptive power-saving mode optimizes battery usage based on your usage patterns.

Fast and Wireless Charging

With 25W fast charging, you can quickly top up your phone’s battery, minimizing downtime. The 15W wireless charging provides a convenient way to charge without dealing with cables, and the reverse wireless charging feature lets you charge other devices, such as earbuds or a smartwatch, directly from your phone.

User-Friendly Software Experience

One UI 3.1

Running on Samsung’s One UI 3.1, based on Android 11, the Galaxy S21 offers a clean and intuitive user interface. One UI is designed to enhance usability and productivity, with features like

  • Dark Mode: Conserves battery life Reduces eye strain.
  • Digital Wellbeing: Helps you monitor and manage your smartphone usage.
  • Samsung DeX: TV for a desktop-like experience Allows you to connect your phone to a monitor.

Regular Updates

Samsung provides regular software updates, ensuring your device stays secure and up-to-date with the latest features and improvements. The Galaxy S21 is also part of Samsung’s commitment to offering extended software support, giving you peace of mind for years to come.

Connectivity and Network Capabilities

5G Connectivity

The Samsung Galaxy S21 is equipped with 5G capabilities, ensuring you’re ready for the next generation of mobile networks. Experience lightning-fast download and upload speeds, low latency, and enhanced connectivity, making it perfect for streaming, gaming, and video calls.

Wi-Fi 6 and Bluetooth 5.0

Wi-Fi 6 ensures faster and more stable internet connections, even in crowded networks. Bluetooth 5.0 offers improved range and connectivity, making it easier to pair with wireless headphones, speakers, and other accessories.

Security and Privacy

In-Display Fingerprint Sensor

The Galaxy S21 features an ultrasonic in-display fingerprint sensor, providing a secure and convenient way to unlock your phone. The sensor is fast and accurate, ensuring your phone is accessible only to you.

Samsung Knox

Samsung Knox provides multi-layered security, protecting your data from malware and malicious threats. With features like Secure Folder and Samsung Pass, you can store sensitive information securely and log into apps and websites quickly and safely.

Why Buy from Instawireless?

Unbeatable Pricing

At $239.99, down from $699.99, the Samsung Galaxy S21 SM-G991U offers incredible value for money. This significant discount makes high-end technology accessible to a broader audience.

Quality Assurance

Instawireless ensures that all their unlocked smartphones meet high standards of quality and performance. Each device undergoes thorough testing and inspection to ensure it is in excellent working condition, providing you with a reliable and satisfying user experience.

Warranty and Support

When you buy from Instawireless, that covers any potential issues with your device you benefit from a warranty. Additionally, their customer support team is available to assist you with any questions or concerns, ensuring a smooth and hassle-free buying experience.

Fast and Secure Shipping

Instawireless offers fast and secure shipping, start enjoying its features right away so you can receive your new smartphone promptly. To ensure your device arrives safely and on time They use reliable shipping partners.

Advantages of Owning a Fully Unlocked Smartphone

Carrier Flexibility

A fully unlocked smartphone is not tied to any specific carrier, giving you the freedom to choose and switch between carriers as needed. This flexibility allows you to find the best plans and coverage that suit your needs.

Travel Convenience

For frequent travelers, an unlocked phone is invaluable. You can easily use local SIM cards in different countries, avoiding expensive international roaming charges while staying connected wherever you go.

Higher Resale Value

Compared to carrier-locked devices Unlocked phones generally have a higher resale value. This is because they are more versatile and appealing to a broader audience, making them easier to sell or trade-in when you’re ready for an upgrade.

No Bloatware

Unlocked phones typically come with less carrier-installed bloatware, giving you more storage space and a cleaner, faster user experience. You have more control over the apps installed on your device, ensuring it runs smoothly and efficiently.


The Samsung Galaxy S21 SM-G991U 128GB 8GB RAM GSM Fully Unlocked World Smartphone is a powerhouse of innovation and technology. From its stunning Dynamic AMOLED display and powerful processor to its versatile camera system and long-lasting battery, the Galaxy S21 delivers an exceptional user experience.

Buying from Instawireless at the reduced price of $239.99 offers unbeatable value, making it an ideal choice for anyone looking to upgrade their smartphone. The advantages of owning a fully unlocked device, combined with the quality assurance and customer support provided by Instawireless, ensure you get the best possible experience with your new phone. Don’t miss out on this incredible deal. Order your Samsung Galaxy S21 from Instawireless today and unlock a world of possibilities with this exceptional device.

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