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Samsung Galaxy S21 5G Review

The Samsung Galaxy S21 5G is a compact premium-leaning Android smartphone with standout strengths in camera quality, display quality, speed, and connectivity. It appears best suited to buyers who want a capable unlocked 5G phone for photography, video, and fast everyday use. Its main limitation is less convincing battery performance, alongside some mixed feedback around software features and fingerprint reliability.
Expert reviewed
79
Overall score
Data-driven scoring Expert reviewed Updated analysis

Why we ranked it highly

The Samsung Galaxy S21 5G is a factory unlocked Android smartphone aimed at users who want strong flagship-style features in a more manageable 6.2-inch form factor. Based on the supplied data, its most convincing areas are camera quality, display quality, speed, and connectivity. It offers a 64MP camera, 8K video capture, a 120Hz AMOLED display, 5G support, dual SIM capability, USB-C, NFC, and wireless charging features, making it a broadly capable everyday phone. The review and score profile suggests it is especially well suited to people who care about mobile photography, smooth performance, and a compact design that is easier to carry than very large phones. Battery life is more mixed, and some owners mention software and feature frustrations, so it does not look like the most trouble-free option in every area. Overall, it comes across as a well-rounded but slightly uneven premium smartphone.
90-day review Expert reviewed User feedback Data scoring

Key specs

Additional details

Operating System
Android
RAM Memory Installed
128 GB
Processor Series
A-Series
Memory Storage Capacity
128 GB
Color
Phantom Gray
SIM Card Slot Count
Dual SIM
Connector Type
USB Type C
Form Factor
Smartphone
Biometric Security Feature
Fingerprint Recognition
Human-Interface Input
Touchscreen
Sim Card Size
Nano
Water Resistance Level
Waterproof
Headphones Jack
3.5 mm
Compatible Devices
Smartphone, Tablet, Laptop, Accessories
Specific Absorption Rate
1.6 Watts per Kilogram
Additional Features
Bluetooth Enabled, Expandable Memory, LTE, Water Resistant, Wireless Charging
Material Features
Premium, Smooth Finish

Camera

Rear Facing Camera Photo Sensor Resolution
64 MP
Camera Description
Front, Rear
Camera Flash
LED
Shooting Modes
Automatic
Optical Sensor Resolution
64 MP
Number of Rear Facing Cameras
1
Number of Front Cameras
3

Battery

Battery Capacity
4000 Milliamp Hours
Battery Description
Lithium-Ion
Battery Charge Time
12 Hours
Battery Power
4000

Battery Life

Battery Average Life
9.53 Hours
Phone Talk Time
25 Hours
Average Battery Life Talk Time
10 Hours

Navigation

GPS Geotagging Functionality
True
Supported Satellite Navigation System
GPS

Display

Screen Size
6.2 Inches
Resolution
3200 x 1440
Refresh Rate
120
Display Type
AMOLED
Aspect Ratio
16:9
Display Resolution Maximum
3200 x 1440 Pixels

Connectivity

Wireless Provider
Unlocked
Cellular Technology
5G
Connectivity Technology
Wi-Fi Connectivity 802.11 a/b/g/n/ac/ax 2.4G+5GHz, HE80, MIMO, 1024-QAM USB USB 3.2 Gen 1 Bluetooth Bluetooth v5.0 Location Technology GPS,Glonass,Galileo Earjack USB Type-C Wi-Fi Direct Yes NFC Yes PC Sync. Smart Switch (PC version) USB Interface USB Type-C OS OS Android
Wireless Network Technology
LTE

Item details

Brand
Samsung
Model Year
2021
Built-In Media
Handset, Travel Adapter, Data Cable, Ejection Pin, USB Connector
Manufacturer
Samsung
Model Series
S21 5G
Specific Uses For Product
Videography
UPC
887276503738 887276473468
Item Type Name
Smartphone
Unit Count
1.0 Count
External Testing Certification
Não Aplicável

Measurements

Item Weight
171 Grams
Item Dimensions
0.3 x 2.8 x 5.9 inches

Video

Effective Video Resolution
1 Pixels
Video Capture Resolution
8k
Frame Rate
24 FPS, 25 FPS, 30 FPS

Scores breakdown

86 /100

Performance

85 /100

Features

80 /100

Usability

82 /100

Design

66 /100

App experience

90 /100

Display quality

77 /100

Audio quality

92 /100

Camera quality

Strengths

  • Strong camera performance supported by a 92 camera score, 64MP sensor, 8K video capture, and consistently positive review feedback.
  • High-quality 6.2-inch AMOLED display with 3200 x 1440 resolution and 120Hz refresh rate, backed by a 90 display score.
  • Fast everyday responsiveness, reflected in an 89 speed score and customer praise for smooth performance.
  • Broad connectivity support including 5G, Wi-Fi 6, Bluetooth 5.0, NFC, GPS, USB-C, and dual SIM.
  • Compact and relatively light smartphone design at 171g, making it easier to carry than many larger flagship phones.
  • Useful premium features such as wireless charging, reverse charging support mentioned in reviews, water resistance, and fingerprint security.

Limitations

  • Battery life is a weaker area in the scoring profile, with a 68 battery score and mixed owner feedback on endurance.
  • No charger brick is included in the box according to reviews, which adds to total ownership cost.
  • App and software experience appears inconsistent in some cases, reflected in the 66 app experience score and review complaints about voicemail and RCS support.
  • Fingerprint recognition receives mixed feedback, with some users finding it fast and others calling it unreliable.
  • Value is not the phone's strongest point at the listed price, with a 73 value score and several reviews describing it as expensive for what is included.
  • Some listing and variant clarity issues appear in reviews, including complaints about receiving a different version than expected.

Ideal user profiles

  • Users who want a compact flagship-style Android phone with strong cameras and a high-quality display.
  • Mobile photographers and casual video creators who will use the 64MP camera, zoom tools, and 8K video features.
  • Buyers who need an unlocked 5G phone with broad carrier flexibility and dual-SIM support.
  • People upgrading from older Android phones who want noticeably faster performance and smoother scrolling.

Use cases

  • Everyday smartphone use including messaging, browsing, streaming, and social media.
  • Travel and daily photography with a compact phone that still offers advanced camera features.
  • Recording high-resolution video clips and share-ready content on the go.
  • 5G mobile data use for faster downloads, app refreshes, and hotspot-style connectivity needs.
  • Navigation and location-based tasks using GPS support.
  • Portable entertainment thanks to the sharp AMOLED display and stereo speaker praise in reviews.

Fit and positioning

Who this works for

Category positioning

The Galaxy S21 5G sits in the premium Android smartphone tier, but its scoring profile suggests it is strongest as a compact performance-focused option rather than an all-round leader. Its camera, display, speed, and connectivity scores are all high, which gives it a flagship-style feel. At the same time, battery life, app experience, and value are less dominant, so it looks better suited to buyers prioritising screen quality and imaging than those shopping mainly for endurance or best-value pricing.

Best for

This phone is best for buyers who want a smaller high-end Android handset with strong camera performance, a sharp AMOLED display, and quick everyday responsiveness. The 92 camera score, 90 display score, 89 speed score, and 88 connectivity score all support that use case. It is also a sensible fit for users who want an unlocked 5G phone with dual SIM support and premium extras such as wireless charging and water resistance.

Not best for

The Galaxy S21 5G is less suitable for buyers who prioritise long battery life, the best value in the category, or a cleaner software and app experience. Its 68 battery score and 66 app experience score point to some compromises, and reviews mention issues around voicemail, RCS support, and inconsistent fingerprint satisfaction. If you expect a charger in the box or want fewer setup and ecosystem caveats, this may feel less complete than expected.

Performance analysis

How it performs in practice

Each scoring dimension is separated into a compact card so the strengths and tradeoffs are easier to compare without reading one long block.

Performance analysis

The Galaxy S21 5G performs well in the areas most buyers notice day to day. Its 86 performance score and 89 speed score suggest strong general responsiveness, and reviews repeatedly describe it as fast, smooth, and capable of handling demanding apps without feeling sluggish. For a smartphone, the main performance highlights are image capture, interface fluidity, and mobile data responsiveness rather than pure benchmark claims. The 120Hz display also helps the phone feel quicker in use. Performance does not appear to be a weak point here, although battery endurance under heavy workloads is more mixed.

Feature analysis

The feature set is competitive and clearly above average, reflected in an 85 feature score. Notable features include a 64MP camera, 8K video, 30x Space Zoom, 120Hz AMOLED display, 5G, dual SIM, water resistance, fingerprint security, wireless charging, and expandable-memory support as listed. Reviews also mention reverse wireless charging and HDMI display output. The main issue is not a lack of features, but that some software functions and bundled accessories feel incomplete for the price.

Usability analysis

With an 80 usability score, the phone appears generally easy to live with. Its compact dimensions help one-handed use more than many larger premium phones, and reviews describe the interface as smooth and setup as straightforward. Fingerprint unlocking is a mixed point: some users found it fast and accurate, while others were less satisfied. Usability also depends partly on Samsung's software layer, which some owners appreciate for its control options, while others found frustrating for specific carrier-linked functions.

Design

The Galaxy S21 5G balances premium styling with practical size. At 171 grams and with a 6.2-inch display, it appears easier to carry and use than many oversized flagship phones. Reviews specifically praise its manageable size and solid feel, which supports its 82 design score. The in-display fingerprint reader keeps the exterior clean, though not everyone likes its placement. Overall, the design looks well judged for users who want a modern smartphone without moving to the largest screen class.

How it compares

Within the premium smartphone category, the Galaxy S21 5G stands out more for balance and portability than for domination in every area. It compares well on camera quality, screen quality, responsiveness, and mobile connectivity, which are some of the most visible day-to-day factors. Its more modest battery and app experience scores mean it may not be the best fit for users who want maximum endurance or the least software friction. Compared with many large-screen flagships, its smaller size is a meaningful advantage. Overall, it looks like a well-rounded premium Android phone with clear strengths and a few compromises that stop it from being class-leading across the board.

Ranking summary

The Galaxy S21 5G ranks as a strong upper-tier option rather than an all-round category leader. Its overall score of 79 is driven by excellent camera quality at 92, display quality at 90, speed at 89, and connectivity at 88. Those strengths make it especially competitive for users who want a compact Android phone focused on imaging, screen quality, and responsive everyday use. It ranks lower than the very best options because battery life is less convincing at 68, app experience is weaker at 66, and reliability is only moderate at 72. In short, it scores best where the phone feels premium, but not in every part of ownership.

Buying advice

Consider the Galaxy S21 5G if you want an unlocked Android phone with a strong camera, excellent display, fast performance, and a more compact body than many flagship rivals. It makes most sense for buyers who value photography, smooth daily use, and flexible connectivity more than battery longevity. Before buying, check exactly which regional or chipset version you are getting, confirm carrier feature support if you rely on services like visual voicemail or RCS, and budget for a charger if one is not included. If long battery life, flawless software integration, or maximum value are your top priorities, compare alternatives carefully.
79
Overall score

Final verdict

The Samsung Galaxy S21 5G is a strong smartphone choice in its category, especially for buyers who want premium camera performance and an excellent display in a compact unlocked Android phone. Its biggest strength is the combination of imaging quality, screen quality, speed, and connectivity, all of which score well and are backed by positive customer feedback. Its biggest limitation is that ownership is not as polished as the best phones in the segment, with mixed battery life, some software and feature frustrations, and only fair value at the asking price. Even so, it remains a capable and appealing option for the right buyer.
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Key topics

Samsung Galaxy S21 5G review, Samsung Galaxy S21 5G smartphone review, Galaxy S21 5G ranking, best unlocked Android smartphone, Samsung phone camera review, Galaxy S21 5G comparison, Samsung Galaxy S21 battery life, Samsung Galaxy S21 display quality

Frequently asked questions

Is the Samsung Galaxy S21 5G worth it?
The Galaxy S21 5G looks worthwhile for buyers who prioritise camera quality, display quality, speed, and strong connectivity in a relatively compact phone. Its overall score of 79 suggests a solid but not flawless option. The main trade-offs are mixed battery feedback, software feature complaints from some users, and weaker value once you factor in the missing charger.
Is the Samsung Galaxy S21 5G good for photography and video?
Yes, camera performance is one of its clearest strengths. It has a 92 camera score, a 64MP rear camera specification, and support for 8K video recording. Customer feedback repeatedly praises photo quality and versatility, although any advanced claims around AI or zoom performance should still be viewed as feature descriptions rather than guaranteed results in every situation.
How good is the Samsung Galaxy S21 5G display?
The display is one of the phone's strongest areas. It carries a 90 display quality score and includes a 6.2-inch AMOLED panel with up to 3200 x 1440 resolution and a 120Hz refresh rate. Reviews also mention sharp visuals, smooth feel, and good visibility, making it well suited to media use and general daily interaction.
Does the Samsung Galaxy S21 5G have good battery life?
Battery life appears acceptable rather than outstanding. The phone has a 4000mAh battery, but its battery life score is only 68 and customer feedback is mixed. Some owners say it lasts all day, while others report shorter endurance under heavier use. If battery life is your top priority, this is a point to check carefully.
Is the Samsung Galaxy S21 5G easy to set up?
Setup looks generally straightforward. The phone has an 82 setup score, and at least one detailed review described the process as easy and natural. As with many Android phones, setup quality may depend on carrier features, app preferences, and transfer needs, but the available evidence points to a mostly smooth initial experience.
Is the Samsung Galaxy S21 5G compatible with US carriers and other networks?
It is sold here as a factory unlocked US version, which should make it more flexible than carrier-locked alternatives. The listing also notes 5G, LTE, dual SIM, GPS, NFC, Wi-Fi, and Bluetooth support. Reviews mention successful use with networks such as Mint Mobile, Telcel, and Mexican carriers, though buyers should still verify band and feature support for their own network.
What are the main drawbacks of the Samsung Galaxy S21 5G?
The main drawbacks are mixed battery-life impressions, the lack of an included charger brick, and some software-related complaints in reviews. A few users also reported issues with fingerprint reliability and missing functions such as visual voicemail or RCS behaviour depending on carrier and app setup. Value for money is decent but not class-leading based on the 73 value score.
How does the Samsung Galaxy S21 5G compare within the smartphone category?
Its scoring profile suggests it competes well on camera quality, screen quality, speed, portability, and connectivity. It is less convincing in battery life, app experience, and support clarity. That makes it more appealing to buyers who want a compact premium-style Android phone than to those focused mainly on long endurance or the smoothest software ecosystem experience.

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