Samsung Galaxy S21 5G Deals - April 2026
Compare 1 SIM-free offer for the Samsung Galaxy S21 5G from UK retailers.
Buy the Samsung Galaxy S21 5G SIM-free from £129.99 at The Big Phone Store.
Samsung Galaxy S21 5G SIM Free deals
Find the best SIM Free deal on the Samsung Galaxy S21 5G from 1 options.
Deals
SIM Free from £129.99
Color
All
Grey
Storage
All
128GB
Budget buyers who want a compact Samsung flagship experience with 5G and a capable triple camera, and are comfortable with a phone that has reached the end of its major software update cycle.
Samsung Galaxy S21 5G SIM Free (1 deals)
Filters
5G
Galaxy S21 5G (Grey)
Cost breakdown
Cashback:
£0.00
Upfront Cost:
£129.99
About the Samsung Galaxy S21 5G
The Samsung Galaxy S21 5G was Samsung's compact flagship for 2021, and while it is now several generations old, it still offers a solid experience for budget-conscious buyers seeking a premium Samsung phone. Powered by the Exynos 2100 (or Snapdragon 888 in some regions), the S21 5G handles everyday tasks, social media, and casual gaming without issue. The 6.2-inch Dynamic AMOLED 2X display with an adaptive 120Hz refresh rate remains sharp and fluid, delivering vibrant colours and deep blacks. The triple camera system features a 12MP main sensor with OIS, a 12MP ultrawide, and a 64MP telephoto capable of 3x hybrid zoom and 8K video recording. The 4,000mAh battery delivers a reliable full day of use with 25W wired fast charging and 15W wireless charging. Samsung introduced a distinctive Contour Cut camera housing design that became a signature of the S21 series. The phone launched at £769 but is now available at a fraction of that price. Software support has largely concluded, with the phone having received Android 15 as its final major update, but it remains a perfectly functional device for those who prioritise value.
Samsung Galaxy S21 5G vs Galaxy S22 5G — Key Differences
| Feature | Samsung Galaxy S21 5G | Samsung Galaxy S22 5G |
|---|---|---|
| Display | 6.2" FHD+ AMOLED, 120Hz, 1,300 nits | 6.1" FHD+ AMOLED, 120Hz, 1,300 nits |
| Chipset | Exynos 2100 (UK) | Exynos 2200 (UK) |
| Camera system | 12MP + 12MP UW + 64MP 3x hybrid | 50MP + 12MP UW + 10MP 3x optical |
| Battery | 4,000mAh, 25W wired | 3,700mAh, 25W wired |
| Build / Design | Glasstic back, 169g | Glass back, 167g |
| Storage options | 128GB / 256GB | 128GB / 256GB |
| SIM-free price | From £129.99 | Not available |
Frequently Asked Questions
Is the Samsung Galaxy S21 5G still worth buying?
The Galaxy S21 5G can still be a reasonable choice if you find it at a heavily discounted price and do not need the latest software updates. The Exynos 2100 handles everyday tasks well and the camera produces good photos. However, with software support nearing its end, most buyers would be better served by a newer mid-range phone like the Galaxy A55 unless the S21 5G is significantly cheaper.
How good is the Samsung Galaxy S21 5G camera?
The triple camera system with a 12MP main, 12MP ultrawide, and 64MP telephoto produces reliably good photos in most conditions. The main sensor with OIS handles low-light situations well, and the telephoto provides a useful 3x hybrid zoom. It also supports 8K video recording, though 4K at 60fps is the more practical option for everyday use.
Does the Samsung Galaxy S21 5G have a headphone jack?
No, the Galaxy S21 5G does not have a 3.5mm headphone jack. Samsung removed it starting with the S21 series. You can use USB-C wired earphones or Bluetooth headphones. The phone also does not include a charger in the box, only a USB-C cable.
Does the Samsung Galaxy S21 5G support expandable storage?
No, the Galaxy S21 5G removed the microSD card slot that was present in earlier S-series phones. It is available in 128GB and 256GB storage options. If you need expandable storage, you would need to look at mid-range options like the Galaxy A-series instead.
How long does the Samsung Galaxy S21 5G battery last?
The 4,000mAh battery comfortably lasts a full day with typical use. It supports 25W wired fast charging, 15W wireless charging, and 4.5W reverse wireless charging. The efficient Exynos 2100 chip helps with power management, though heavy gaming or camera use will drain the battery faster.
How does the Samsung Galaxy S21 5G compare to the Samsung Galaxy S22 5G?
The S22 5G improves on the S21 with a brighter display, a new 50MP main camera with better low-light performance, the Exynos 2200 chipset with an AMD GPU, and Gorilla Glass Victus+ protection. The S22 also received one additional year of software support. Both share the same 6.1-6.2 inch form factor and 4,000mAh battery with 25W charging. Compare Samsung Galaxy S22 5G deals.
Samsung Galaxy S21 5G Specifications
General
Dimensions
151.7 x 71.2 x 7.9
Weight
169 g
SIM
· Nano-SIM +
Operating System
Android 11, up to 4 major upgrades
Colours
Radio
FM radio (Snapdragon model only; market/operator dependent)
Body
Phantom Gray, Phantom White, Phantom Violet, Phantom Pink
Camera
Primary Camera Megapixels
64
Primary Camera
12 , f/1.8, 26mm (wide), 1/1.76", 1.8µm, dual pixel PDAF, OIS
Primary Camera Video
8K@24fs, 4K@30/60fs, 1080@30/60/120/240fs, HDR10+, stereo sound rec., gyro-EIS
Second Camera
12 , f/1.8, 26mm (wide), 1/1.76", 1.8µm, dual pixel PDAF, OIS
Third Camera
12 , f/1.8, 26mm (wide), 1/1.76", 1.8µm, dual pixel PDAF, OIS
Selfie Camera Features
HDR
Primary Selfie Camera
10 , f/2.2, 26mm (wide), 1/3.24", 1.22µm, dual pixel PDAF
Video Resolution
4320
Selfie Video Resolution
4K@30/60fs, 1080@30fs
Display
Type
Dynamic AMOLED 2X, 120Hz, HDR10+, 1300 nits (peak)
Display Size
6.2
Display Resolution
1080 x 2400 pixels, 20:9 ratio (~421 ppi density)
Display Protection
Corning Gorilla Glass Victus
CPU & Memory
Chipset
Exynos 2100
GPU
Mali-G78 MP14 - International
CPU
Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International
Memory Card Slot
No
Internal Storage
Sound
Loudspeaker
Yes, with stereo speakers
3.5mm Jack
No
Connectivity & Data
2G
GSM 850 / 900 / 1800 / 1900
3G
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G
1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 38, 39, 40, 41, 46, 48, 66, 71 - SM-G991U1
5G
2, 5, 25, 41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave - SM-G991U1
Network Speed
HSPA 42.2/5.76 Mbps, LTE (7CA) Cat20 2000/200 Mbps, 5G (5+ Gbps DL)
Network Technology
GSM / CDMA / HSPA / EVDO / LTE / 5G
Wi-Fi
Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct
Bluetooth
5.0, A2DP, LE
USB
USB Type-C 3.2, OTG
NFC
Yes
GPS
GPS, GLONASS, BDS, GALILEO
Battery
Battery
4000
Charging
25W wired, PD3.0 15W wireless (Qi) 4.5W reverse wireless
Other
Sensors
Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer