The Galaxy S21Plus 5G is Samsung's mid-tier flagship smartphone released in January 2021, featuring 5G network support, a 6.8-inch Changing AMOLED 2X display, and a triple rear camera system with 10x digital zoom. It runs on Samsung's Exynos 2100 (global) or Snapdragon 888 (US) chipset, offering high-performance mobile computing and smooth 5G connectivity.
Designed for users seeking premium features without the highest price tag, the Galaxy S21Plus 5G sits between the base S21 and the top-tier S21 Ultra. It delivers flagship-level hardware, including IP68 dust and water resistance, 120Hz adaptive refresh rate, and 128GB internal storage. The device supports wireless charging and reverse wireless charging, enabling power sharing with compatible accessories.
As a 5G-capable device, it connects to faster mobile networks, reducing download times and improving streaming quality. It uses a 4,800mAh battery with fast charging (25W wired, 15W wireless) and supports USB-C. The phone runs Android 12 with One UI 4.0, offering a clean interface with customizable settings and enhanced privacy controls.
The Galaxy S21Plus 5G operates through a combination of hardware and software optimized for speed, efficiency, and multimedia performance. Its 6.8-inch Changing AMOLED 2X screen adjusts brightness and color based on ambient light, using HDR10+ support for deeper blacks and brighter highlights. The 120Hz refresh rate ensures smooth scrolling and responsive touch input, especially during gaming or video playback.
Under the hood, the Exynos 2100 (used in most global markets) and Snapdragon 888 (available in the US and select regions) provide consistent performance across demanding tasks. Benchmarks show the device scoring around 780,000 on AnTuTu v9, placing it among the top-performing smartphones of its generation. The GPU handles complex graphics rendering, making it suitable for mobile gaming and AR applications.
5G connectivity enables faster downloads and lower latency. For example, a 1.2GB movie file downloads in under 3 minutes on a 5G network, compared to 10-15 minutes on 4G. This speed advantage is noticeable in cloud-based apps, live video conferencing, and real-time multiplayer games.
The Galaxy S21Plus 5G comes in multiple configurations based on region and carrier. The primary differences lie in the processor, supported 5G bands, and available color options. It is offered in Phantom Black, Cosmic Gray, and White, with a matte glass back and aluminum frame.
| Feature | Global Model (Exynos 2100) | US Model (Snapdragon 888) |
|---|---|---|
| Processor | Exynos 2100 | Snapdragon 888 |
| RAM | 12GB | 12GB |
| Storage | 128GB (non-expandable) | 128GB (non-expandable) |
| 5G Bands | Sub-6GHz and mmWave (varies by region) | Sub-6GHz and mmWave (AT&T/Verizon-specific) |
| Battery Life | Up to 18 hours video playback | Up to 18 hours video playback |
A common misconception is that the Exynos 2100 model performs worse than the Snapdragon 888 version. While benchmarks show slightly lower GPU scores, real-world usage shows minimal difference in daily tasks. A 2021 test by GSMArena found both variants delivered similar app launch times and sustained performance during gaming sessions.
One non-obvious detail: the S21Plus 5G lacks a microSD card slot. Storage expansion is not supported, unlike some mid-range Samsung devices such as the Galaxy A32 5G. This limits flexibility for users who store large media libraries. The Galaxy A32 5G, released in June 2021, includes a microSD slot and costs less than half the price, but lacks the S21Plus's camera quality and build materials.
The Galaxy S21Plus 5G excels in photography, video recording, and productivity. Its 64MP main sensor captures sharp images with good changing range. The 12MP ultra-wide lens records 4K video at 30fps, while the 10MP telephoto lens offers 10x digital zoom. A real-world example: a user in Seattle took photos of Mount Rainier during golden hour-the telephoto lens captured distant mountain details, with minimal noise.
Users often confuse the S21Plus 5G with the older Galaxy S10 FE 5G. The S10 FE 5G, released in 2020, uses a Snapdragon 855 chip and lacks 120Hz refresh rate. It has a smaller 6.7-inch display and a 3,900mAh battery. While the S10 FE 5G is still functional, it cannot match the S21Plus 5G in processing power, display quality, or camera versatility.
Another confusion arises around battery life. Some assume the larger screen and 5G radio drain the battery quickly. However, real-world testing by CNET showed the S21Plus 5G lasted 14 hours on mixed usage (web browsing, social media, video streaming) with 5G enabled. Turning off 5G extended battery life to 16 hours. This demonstrates efficient power management despite high-performance components.
I used the Galaxy S21Plus 5G for six months while traveling across the US. On a trip from Chicago to Denver, I relied on 5G for navigation and real-time traffic updates. The phone maintained stable signal strength throughout the process, even in remote areas with spotty coverage. The 120Hz display made map interactions fluid, and the 12GB RAM ensured apps loaded instantly.
For users considering upgrading from older models, the S21Plus 5G offers significant improvements in display, camera, and network speed. If you're currently using a Galaxy S10 FE 5G, switching to the S21Plus 5G gives you better photo quality, faster app performance, and improved battery efficiency due to newer power-saving algorithms.
The Galaxy S21Plus 5G combines useful hardware, refined software, and modern design into a single device. It's not just a phone-it's a tool for communication, creativity, and connection in a high-speed world.