Galaxy S10+ Vs Galaxy S21 5G

Galaxy S10+
Galaxy S10+
Starting at

Refurbished price:£115.32

Versus £330.00 new

See options
Galaxy S21 5G
Galaxy S21 5G
Starting at

Refurbished price:£133.00

Versus £829.00 new

See options

Ratings

The Samsung Galaxy S10 Plus, released in 2019, and the Galaxy S21 5G, launched in 2021, represent two distinct eras of Samsung's flagship smartphone development. While the S10 Plus was the pinnacle of the traditional flagship design with its curved glass and legacy ports, the S21 5G moved toward a more streamlined, performance-oriented approach. Both devices run on the Android operating system, though they sit at very different stages of their software lifecycles.

The primary differences between these two models lie in their display technology, network connectivity, and the inclusion of hardware features like expandable storage and headphone jacks. This comparison explores how these two generations handle modern tasks and which user profiles are best served by each device's specific strengths.

Scores

Durability

When evaluating how long these devices will remain functional and secure, the two-year age gap creates a significant divide in software longevity and hardware resilience.

  • Software Update Cycle: The Galaxy S21 5G benefits from a much longer support window, receiving several more years of Android operating system updates and security patches compared to the S10 Plus, which has reached the end of its major update programme.
  • Physical Build and Materials: The S10 Plus features a traditional glass-and-metal construction that feels substantial, while the S21 5G uses a reinforced polycarbonate back designed to be more resistant to cracks from accidental drops.
  • Long-term Maintenance: As a newer device, the S21 5G generally has better availability for official replacement parts like batteries and screens, making it slightly easier to maintain through a professional repair service over the coming years.

Year of Release

2019

2021

Compatible with latest Update

No

Yes

OS

Android

Android

Foldable

No

No

Performance

Performance differences are most noticeable when running demanding applications or multitasking between several heavy tools, where the newer internal hardware of the S21 5G takes the lead.

  • System Responsiveness: The S21 5G provides a noticeably smoother experience when opening apps and navigating the interface, thanks to a more efficient processor that handles modern software demands with less heat and lag.
  • Storage and Memory: The S10 Plus offers the flexibility of a microSD card slot for expanding storage, a feature removed from the S21 5G, which relies solely on its internal capacity for photos, videos, and apps.
  • Battery Efficiency: While both devices have similar battery capacities, the S21 5G utilises more advanced power management technology to ensure the device lasts through a full day of typical use more consistently than the older S10 Plus.

Memory (GB)

8 GB

8 GB

Screen quality

The viewing experience on these devices involves a trade-off between the absolute sharpness of the older model and the fluid motion of the newer one.

  • Motion Smoothness: The S21 5G features a high refresh rate display that updates 120 times per second, making scrolling through social media and system animations appear much more fluid than the standard 60Hz screen on the S10 Plus.
  • Display Resolution: Interestingly, the S10 Plus features a higher maximum resolution (QHD+), providing slightly more detail for high-definition video content, whereas the S21 5G uses a standard high-definition (FHD+) panel.
  • Outdoor Visibility: The S21 5G screen is capable of reaching higher peak brightness levels, which makes it significantly easier to read and use when standing in direct sunlight compared to the S10 Plus.

Resolution

1440 x 3040

1080 x 2400

Screen type

Dynamic AMOLED

Dynamic AMOLED 2X

Audiovisual

Both smartphones feature versatile triple-lens camera systems, but the S21 5G introduces several software and hardware refinements for better photography and video.

  • Zoom and Detail: The S21 5G employs a high-resolution 64-megapixel sensor for its telephoto lens, allowing users to crop into photos or zoom in with much greater clarity and less digital noise than the S10 Plus.
  • Video Capabilities: Users who record a lot of video will find the S21 5G more capable, as it supports 8K recording and features improved electronic stabilisation for smoother handheld footage.
  • Front-Facing Photography: The S10 Plus is unique for its dual front-facing camera setup, which includes a dedicated depth sensor for more natural-looking background blur in selfies, a task the S21 5G handles through software alone.

Main camera

12 megapixels

12 megapixels

Front camera

10 megapixels

10 megapixels

Miscellaneous

Practical daily usage is often determined by connectivity standards and the physical ports available on the device, where these two models differ greatly.

  • Network Connectivity: The S21 5G is built for modern mobile networks, supporting 5G for faster download speeds and better performance in crowded areas, while the S10 Plus is limited to 4G LTE networks.
  • Hardware Ports: The S10 Plus is one of the last flagship devices to include a 3.5mm headphone jack, allowing for the use of wired headphones without an adapter, a feature absent on the S21 5G.
  • Biometric Security: Both devices use ultrasonic fingerprint sensors hidden under the display, but the S21 5G features a larger and more responsive sensor area, leading to fewer failed unlock attempts during daily use.

Weight

175 g

169 g

Screen size (in)

6.4

6.2

Mobile network

4G

5G

SIM card

Dual Physical SIM

Dual Physical SIM + eSIM

Carrier compatibility

Unlocked

Unlocked

In summary, the choice between the Galaxy S10 Plus and the Galaxy S21 5G depends largely on whether a user prioritises legacy hardware features or modern performance standards. Based on user discussions on platforms like Reddit, the S10 Plus remains a favourite for those who value the headphone jack, expandable storage, and the higher-resolution curved display. However, many users note that the S10 Plus battery life and software speed have begun to show their age in recent years.

Conversely, the Galaxy S21 5G is frequently praised for its 120Hz refresh rate, which makes the entire phone feel significantly faster, and its 5G capabilities which ensure it remains compatible with the latest network speeds. Some users do express disappointment over the move to a plastic back and the removal of the SD card slot, but generally agree that the improved camera and longer software support make it a more practical choice for the future.

Users who still rely on wired accessories and need vast amounts of local storage for media may find the S10 Plus better suited to their specific needs. Meanwhile, professionals and students who require a fast, reliable device for the next several years will likely prefer the S21 5G. Choosing a quality-assured refurbished option for either model is a sustainable choice that helps reduce electronic waste while providing a reliable mobile experience. Ultimately, the S21 5G offers a more current experience, while the S10 Plus serves as a capable alternative for those with specific hardware preferences.

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