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Samsung S21 5G reviews
Brand: Samsung More Samsung mobile phones reviews →
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Compare Samsung S21 5G reviews, specifications and available UK retailer offers. Check the details for this exact model and follow the original critics’ findings.
Manufacturer codeSM-G991BZIDEUA
The product, explained
About the Samsung S21 5G
Samsung SM-G991BZIDEUA is listed in the smartphones category. The recorded specifications include display diagonal: 15.8 cm (6.2"); internal storage capacity: 128 GB; mobile network generation: 5G; operating system installed: Android 11. This entry covers manufacturer code SM-G991BZIDEUA. Specifications relate to this exact source record; other editions or packages may differ.
The 15.8 cm (6.2") display is specified at 2400 x 1080 pixels. Consider these together: a larger screen provides more physical space, while resolution determines the number of pixels available. Neither specification establishes brightness, colour accuracy or motion quality.
The listed maximum refresh rate is 120 Hz. A higher refresh rate can make scrolling and supported games look smoother. The rate used depends on the app and display settings, and can affect battery life.
- Screen size
- 15.8 cm (6.2")
- Screen resolution
- 2400 x 1080 pixels
- Maximum refresh rate
- 120 Hz
- Memory (RAM)
- 8 GB
- Storage capacity
- 128 GB
- Mobile network generation
- 5G
Make it work for you
Before choosing the Samsung S21 5G
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Independent perspectives
Expert reviews 2
Independent ratings, converted to the same five-point scale. Each card links to the original review and identifies the available evidence.
IT Pro
4.00 / 5Original rating: 4 / 5
Reviewed model: Samsung Galaxy S21 5G. Storage, colour and included accessories may differ from this listing.
Read the full review ↗Checked 10 Oct 2026
T3
4.00 / 5Original rating: 4 / 5
Reviewed model: Samsung Galaxy S21 5G. Storage, colour and included accessories may differ from this listing.
Read the full review ↗Checked 3 Nov 2026
More expert reviews
HotHardware
Samsung Galaxy S21 5G Review: Packed With Features And Value
By Dave Altavilla. Read the publisher’s assessment of this model.
Read the full review ↗Review link · Not included in the COR Score
TechnikNews
Samsung Galaxy S21 5G review: Great device, but that certain something is missing
By Nils Ahrensmeier. Read the publisher’s assessment of this model.
Read the full review ↗Review link · Not included in the COR Score
The GATE
Samsung Galaxy S21 5G review | Sharp cameras, Director’s View & smart features
By W. Andrew Powell. Read the publisher’s assessment of this model.
Read the full review ↗Review link · Not included in the COR Score
Independent reviews, made comparable
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8/ 104.00/ 5
An illustration of conversion, not this product’s rating.
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Know exactly what you’re buying
Samsung S21 5G specifications
Manufacturer code: SM-G991BZIDEUA · Icecat product 87714539 · Checked 24 Sep 2026. Specifications belong to this exact model.
Key specifications
The main features to compare for this exact model. Missing details are not assumed.
| Screen size | 15.8 cm (6.2") |
|---|---|
| Screen resolution | 2400 x 1080 pixels |
| Maximum refresh rate | 120 Hz |
| Memory (RAM) | 8 GB |
| Storage capacity | 128 GB |
| Mobile network generation | 5G |
| Rear camera resolution | 12 MP |
| Battery capacity | 4000 mAh |
| Operating system installed | Android 11 |
| NFC | Yes |
More product specifications
Open a section for the details that matter to you.
Audio & listening4 details
| Speakerphone | Yes |
|---|---|
| Speakers | stereo |
| Audio system | Dolby Atmos |
| Audio formats supported | 3GA, AAC, AMR, APE, AWB, DFF, DSF, FLAC, IMY, M4A, Mid, MIDI, MP3, MXMF, OGA, OGG, OTA, RTTTL, RTX, WAV, WMA, XMF |
Display9 details
| Screen shape | Flat |
|---|---|
| Display technology marketing name | Dynamic AMOLED 2X |
| Panel type | OLED |
| Display number of colours | 16 million colours |
| High Dynamic Range (HDR) supported | Yes |
| High Dynamic Range (HDR) technology | High Dynamic Range 10+ (HDR10 Plus) |
| Touchscreen type | Capacitive |
| Rounded display corners | Yes |
| Touchscreen | Yes |
Processor, memory & storage4 details
| Processor cores | 8 |
|---|---|
| Processor frequency | 2.9 GHz |
| RAM type | LPDDR5 |
| Compatible memory cards | Not supported |
Camera, image & video26 details
| Second rear camera resolution (numeric) | 12 MP |
|---|---|
| Third rear camera resolution (numeric) | 64 MP |
| Rear camera aperture number | 2.2 |
| Second rear camera aperture number | 1.8 |
| Third rear camera aperture number | 2 |
| Rear camera pixel size | 1.4 µm |
| Second rear camera pixel size | 1.8 µm |
| Third rear camera pixel size | 0.8 µm |
| Rear camera field of view (FOV) angle | 120° |
| Second rear camera field of view (FOV) angle | 79° |
| Third rear camera field of view (FOV) angle | 76° |
| Optical zoom | 3x |
| Digital zoom | 30x |
| Front camera type | Single camera |
| Front camera resolution (numeric) | 10 MP |
| Rear camera flash | Yes |
| Video capture resolution (max) | 7680 x 4320 pixels |
| Resolution at capture speed | 1280x720@30fps, 1280x720@960fps, 1920x1080@240fps, 1920x1080@30fps, 1920x1080@60fps, 3840x2160@30fps, 3840x2160@60fps |
| Video recording modes | 720p, 1080p, 2160p |
| Rear camera type | Triple camera |
| Auto focus | Yes |
| Video stabilizer | Yes |
| Image stabilizer | Yes |
| Video call | Yes |
| Supported video modes | 720p, 1080p, 2160p, 4320p |
| Video formats supported | 3G2, 3GP, ASF, AVI, FLV, M4V, MKV, MP4, WEBM, WMV |
Connections & wireless16 details
| USB mass storage | Yes |
|---|---|
| SIM card capability | Dual SIM |
| SIM card type | NanoSIM + eSIM |
| Wi-Fi | Yes |
| Wi-Fi standards | 802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac), Wi-Fi 6 (802.11ax) |
| Bluetooth | Yes |
| Bluetooth version | 5.0 |
| Wi-Fi Direct | Yes |
| USB port | Yes |
| USB connector type | USB Type-C |
| USB version | 3.2 Gen 1 (3.1 Gen 1) |
| Headphone connectivity | USB Type-C |
| Wi-Fi positioning | Yes |
| USB On-The-Go support | Yes |
| Wireless Power Share | Yes |
| SIM card ejector pin | Yes |
Power & battery3 details
| Fast charging | Yes |
|---|---|
| Wireless charging | Yes |
| Removable battery | No |
Controls & features8 details
| Voice over LTE (VoLTE) supported | Yes |
|---|---|
| Fingerprint reader | Yes |
| Virtual assistant | Samsung Bixby |
| Proximity sensor | Yes |
| Ambient light sensor | Yes |
| Orientation sensor | Yes |
| Geomagnetic sensor | Yes |
| Hall sensor | Yes |
Design & dimensions9 details
| Form factor | Bar |
|---|---|
| Product colour | Pink |
| Colour name | Phantom Pink |
| Protection features | Dust resistant, Water resistant |
| Water and dust resistance (IP rating) | IP68 |
| Width | 71.2 mm |
| Depth | 7.9 mm |
| Height | 151.7 mm |
| Weight | 171 g |
Further product details31 details
| Pixel density | 421 ppi |
|---|---|
| User memory | 110 GB |
| Geotagging | Yes |
| Multi-shot | Yes |
| Self-timer | Yes |
| Night mode | Yes |
| 3G standards | HSDPA, HSPA+, HSUPA, UMTS |
| 4G standard | LTE |
| Tethering (modem-mode) | Yes |
| Subscription type | No subscription |
| Short Message Service (SMS) | Yes |
| Multimedia Messaging Service (MMS) | Yes |
| Yes | |
| GPS (satellite) | Yes |
| GLONASS | Yes |
| BeiDou | Yes |
| Galileo | Yes |
| Position location | Yes |
| Iris recognition | No |
| Face recognition | Yes |
| Vibrating alert | Yes |
| Platform | Android |
| App distribution platform | Google Play |
| Google applications | Google Maps, Google Play |
| Accelerometer | Yes |
| Gyroscope | Yes |
| Barometer | Yes |
| Repairability index | 8.2 |
| Quick start guide | Yes |
| Head SAR (EU) | 0.456 W/kg |
| Body SAR (EU) | 1.509 W/kg |
Packaging & supplied accessories1 detail
| Cables included | USB Type-C |
|---|
Specifications describe the supplied product data, not measured review results. Battery life, range and performance figures are source claims and can vary with use.
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Your questions, answered
Samsung S21 5G FAQs
How many expert reviews are available for Samsung S21 5G?
This page currently includes 2 scored critic reviews. Each publisher counts once. Follow the review cards for the original verdict and the version that was tested.
What is the COR Score for Samsung S21 5G?
The COR Score is tbd. We publish a combined score only after at least three distinct critics have usable ratings. Any individual reviews already available remain visible.
Which exact version does this page cover?
This page identifies Samsung S21 5G using manufacturer code SM-G991BZIDEUA. Check that reference, configuration and supplied accessories against the retailer listing. Related-version reviews are labelled separately and do not contribute to this version’s score.
What is the listed display diagonal for Samsung S21 5G?
The source specification records display diagonal as 15.8 cm (6.2"). This is a specification, not an independent performance measurement. Check the exact model and the original critic reviews for real-world results.
What is the listed display resolution for Samsung S21 5G?
The source specification records display resolution as 2400 x 1080 pixels. This is a specification, not an independent performance measurement. Check the exact model and the original critic reviews for real-world results.
Where can I compare prices for Samsung S21 5G?
Use the retailer-offer section on this page for available matched offers. If no offer is shown, we do not currently have a verified price. Confirm model, stock, delivery and the final total at the retailer; coverage does not include every seller.
Will 5G work on every network?
Compatibility depends on the exact handset variant, local coverage and provider. Confirm with the network before purchase.
Are more megapixels always better?
No. Lens, sensor, processing and conditions matter. Use full reviews and sample use cases.
How long should a phone receive updates?
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How should I use the specifications alongside reviews?
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Mobile phone buying guides
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Start with the complete buying guide →Phone screen sizes: choosing comfort over the diagonalA large diagonal can come from a tall, narrow display, so it does not describe grip width or pocket fit. Chassis dimensions, weight distribution and case thickness are better clues to everyday comfort.How much phone storage do you need?Choose storage from offline media, photo and video habits, large apps and how long the phone will be kept.Phone camera specifications that matter beyond megapixelsCompare main, ultrawide and telephoto results in real light, including focus, stabilisation and processing.Phone battery life, charging speed and long-term healthCompare tested endurance, charging time, heat and software limits rather than battery capacity alone.