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Samsung Galaxy S21 Ultra – UK Price, Specs and Deals

Jack Harry Clarke Harrison • 2026-04-20 • Reviewed by Daniel Mercer

Samsung’s Galaxy S21 Ultra 5G arrived on UK shelves in January 2021 as the company’s flagship offering for that year. More than four years later, the device has transitioned from premium status to an accessible option for budget-conscious buyers seeking high-end features without flagship pricing. Current market data shows significant price reductions across SIM-free, contract, and refurbished channels, making now an opportune time to consider this former top-tier smartphone.

The device distinguished itself upon release with a sophisticated camera system headlined by a 108-megapixel main sensor, support for Samsung’s S Pen stylus previously reserved for the Galaxy Note series, and an expansive 6.8-inch display. Understanding the current pricing landscape, storage configurations, and available deals requires examining multiple retail sources to identify the best value options across the UK market.

This guide compiles verified pricing data, technical specifications, and retailer availability to help prospective buyers make informed decisions about purchasing a Galaxy S21 Ultra in 2026.

Samsung Galaxy S21 Ultra Price

UK pricing for the Galaxy S21 Ultra has settled considerably since the device launched at over £1,000. Current SIM-free prices start from approximately £179.95 for entry-level configurations, according to price tracking data from Smartphone Checker. The most commonly available 128GB models in Phantom Black are listed between £234.99 and £239.99 depending on retailer and colour variant, with Titanium finishing commanding a slight premium.

Price Range
From £179.95 (SIM-free)
Screen
6.8-inch Dynamic AMOLED 2X
Camera
108MP quad setup
Storage
128GB / 256GB / 512GB

Key Insights on Samsung Galaxy S21 Ultra

  • The Galaxy S21 Ultra represents strong value as a former flagship now available at mid-range pricing across UK retailers
  • Significant price depreciation since 2021 makes this an attractive option for 5G connectivity without premium costs
  • Contract deals start from as low as £10 per month through various providers
  • SIM-free purchase combined with a budget SIM-only plan can save approximately £97 compared to the cheapest contract over 24 months
  • Refurbished units in excellent condition are widely available between £400-600
  • Samsung no longer sells new units directly, though promotional financing at 0% APR may appear on their official website
  • Best SIM-free prices are currently tracked through comparison platforms including Smartphone Checker and PriceSpy

Samsung Galaxy S21 Ultra Price Snapshot

Storage / Colour SIM-Free Price Contract Example
128GB Phantom Black £234.99 £16/month + £39 upfront (O2, 50GB)
128GB Titanium £239.99
256GB Dual SIM £359.90
Refurbished (varies) £400–600
Contract Savings Tip

Buying SIM-free at £179.95 plus a £8/month 50GB SIM-only plan costs £371.95 over 24 months. This represents a £96.70 saving compared to the cheapest contract deal, though it requires paying the full device cost upfront.

Samsung Galaxy S21 Ultra 256GB

The 256GB storage variant appeals to users requiring additional space for media, applications, and files without relying on cloud storage solutions. Current listings show the 256GB Dual SIM model with 12GB RAM priced at approximately £359.90 through PriceSpy, making it roughly £125 more expensive than the entry-level 128GB option.

Unlocked pristine-condition units in both Phantom Black and Navy finishes are available through specialist refurbished retailers. The 256GB configuration remains relevant for power users who capture substantial photo and video content or maintain large offline music and application libraries. Samsung’s official specifications confirm that expandable storage via microSD card is not supported on this model, making the internal storage capacity a permanent consideration at purchase time.

Storage Options Available

  • 128GB — Entry-level option suitable for light to moderate users
  • 256GB — Mid-range choice for power users and media collectors
  • 512GB — Upper-tier configuration with premium pricing
  • RAM configurations range from 12GB to 16GB depending on storage tier

Samsung Galaxy S21 Ultra Camera

The camera system on the Galaxy S21 Ultra represented Samsung’s most advanced mobile photography setup at launch. A 108-megapixel wide-angle main sensor serves as the primary capture device, complemented by a 12-megapixel ultrawide lens for landscape and architectural shots. Two separate 10-megapixel telephoto lenses provide optical zoom capabilities at different focal lengths, enabling users to capture distant subjects without quality degradation.

The device supports 100x Space Zoom, combining optical and digital processing, though image quality at maximum zoom remains best-effort rather than comparable to lower zoom levels. Video recording extends to 8K resolution at 24 frames per second, with 4K recording available at 60fps for smoother footage. According to GSMArena’s specifications database, the front-facing camera delivers 40 megapixels for high-resolution selfies and video calls.

Camera Capabilities

The quad-lens rear system offers versatility across shooting scenarios: ultrawide for expansive scenes, standard for everyday photography, and dual telephoto options for portraits and distant subjects. The 108MP sensor uses pixel binning to produce detailed 12MP images in default mode while retaining the option to capture full-resolution shots.

Samsung Galaxy S21 Ultra Screen Size

Measuring 6.8 inches diagonally, the Galaxy S21 Ultra display ranks among the largest flagship smartphone screens available at launch. The Dynamic AMOLED 2X panel delivers a resolution of 3200 by 1440 pixels, though the default setting may render at lower resolution to conserve battery. Refresh rates reach 120Hz, providing smooth scrolling and responsive touch interaction, with the display capable of adjusting this rate dynamically based on content.

The screen earned praise for its brightness levels, colour accuracy, and outdoor visibility. Samsung’s official specifications page notes that peak brightness enables comfortable viewing even in direct sunlight. The curved edge design, while visually striking, represents a departure from the flatter displays found on the standard Galaxy S21 and S21 Plus models.

Display Specifications Summary

  • Size: 6.8 inches (approximately 171mm)
  • Technology: Dynamic AMOLED 2X
  • Resolution: 3200 x 1440 pixels
  • Refresh rate: Up to 120Hz with adaptive adjustment
  • Peak brightness: High output for outdoor visibility

Samsung Galaxy S21 Ultra Phone Case

While specific case bundle deals are not prominently featured in current retailer promotions, third-party case manufacturers produce extensive accessory options for the Galaxy S21 Ultra. Cases range from slim protective covers to rugged drop-tested designs, with prices varying based on brand, materials, and protection level.

Samsung’s official store offers branded cases, though direct promotional bundles linking phone purchases with discounted cases have become less common as the device ages. For buyers purchasing through contract deals, case inclusion varies by retailer and promotional period. Specialist refurbished sellers like Smart Cellular list unlocked pristine-condition units but do not bundle cases with their device offerings.

Availability Note

Argos and CeX do not feature prominently in current Galaxy S21 Ultra listings. General refurbished and SIM-free options are more readily available through dedicated electronics comparison platforms and specialist retailers. Buyers seeking in-store purchasing options should check local availability directly with these retailers.

Samsung Galaxy S21 Ultra Timeline

Understanding the device’s market position requires examining its release trajectory and how it has aged since launch. The Galaxy S21 Ultra followed Samsung’s established annual flagship release pattern while introducing features previously exclusive to the Galaxy Note series.

  1. January 2021 — Samsung announced the Galaxy S21 Ultra alongside the standard S21 and S21 Plus models during its virtual Galaxy Unpacked event
  2. January 29, 2021 — Official UK release date, with retail availability across carriers, Samsung stores, and electronics retailers
  3. Early 2022 — Successor Galaxy S22 Ultra launched, beginning the gradual shift in flagship attention toward newer models
  4. 2024–2026 — Device transitions to renewed and refurbished market focus, with new unit supplies exhausted and pricing stabilising at budget-to-mid-range levels

Price and Availability Notes

Certain aspects of the Galaxy S21 Ultra market remain clearer than others. Prices and specifications sourced from official Samsung channels and established comparison platforms reflect verified data, while specific availability at individual retailers requires direct checking.

What We Know vs What Remains Unclear

Established: SIM-free pricing from major comparison platforms, contract deals from major UK carriers, refurbished ranges from specialist sellers. Unclear: Current stock levels at Argos and CeX specifically, real-time pricing fluctuations, availability of specific colour variants in specific regions.

Established Information Information Requiring Verification
SIM-free prices from comparison platforms Live stock at specific retailers
Official Samsung specifications Argos and CeX current listings
Contract pricing from major carriers Regional colour availability
Refurbished price ranges Real-time deal promotions

Why Consider S21 Ultra in 2026

The Galaxy S21 Ultra presents a compelling proposition for buyers prioritising flagship features at reduced cost. The device delivered premium specifications at launch, and while subsequent generations have improved in processor efficiency and computational photography, the S21 Ultra remains capable for most contemporary use cases including streaming, photography, gaming, and productivity tasks.

Key differentiators from newer budget options include the telephoto camera system, S Pen support, and build quality associated with flagship positioning. Against newer mid-range devices, the S21 Ultra may offer superior camera versatility despite its age, though processor performance will show differences in benchmark testing and intensive applications.

For buyers weighing the S21 Ultra against more recent options like the Galaxy S24 series, the price differential remains substantial. The older flagship provides an accessible entry point to Samsung’s ecosystem while newer models command premium pricing for incremental improvements.

Sources and Key Information

Samsung described the camera system upon launch as providing “epic camera right out of the box,” emphasising the hardware capabilities alongside computational photography features.

— Samsung UK product marketing materials, January 2021

Technical specifications referenced throughout this guide draw from Samsung’s official UK product pages and GSMArena’s comprehensive device database. Pricing data reflects market monitoring from comparison platforms including Smartphone Checker and PriceSpy. Contract pricing information comes from uSwitch, which aggregates carrier offerings across the UK market.

Summary

The Samsung Galaxy S21 Ultra has aged into an accessible mid-range option while retaining flagship-level features including a sophisticated 108-megapixel camera system, 6.8-inch high-refresh display, and S Pen compatibility. UK buyers can find SIM-free units starting around £180, with 128GB models typically priced between £235 and £240. Contract deals begin from approximately £10 per month, while refurbished units in excellent condition range from £400 to £600. Storage configurations span 128GB, 256GB, and 512GB options. For those comparing smartphone options, the device remains relevant as a cost-effective entry point to Samsung’s premium ecosystem. For related purchasing guides, see our McDonald’s Menu with Prices in Ireland: Full List & Deals for other consumer price comparisons, or explore Pepe Coin Price Prediction – 2026-2050 Forecasts and Analysis for additional market analysis coverage.

Frequently Asked Questions

What is the Samsung Galaxy S21 Ultra price in the UK?

SIM-free prices start from approximately £179.95 for entry-level models, with 128GB variants typically priced between £234.99 and £239.99. Contract deals begin from around £10 per month through various providers.

Where can I buy a Samsung Galaxy S21 Ultra 256GB?

Current listings for the 256GB model appear on price comparison platforms including PriceSpy and Smartphone Checker. Specialist refurbished retailers also stock unlocked units in pristine condition.

What is the screen size of the Samsung Galaxy S21 Ultra?

The device features a 6.8-inch Dynamic AMOLED 2X display with up to 120Hz refresh rate and 3200 x 1440 pixel resolution.

Does the Samsung Galaxy S21 Ultra support 5G?

Yes, the Galaxy S21 Ultra supports 5G connectivity along with Wi-Fi 6, Bluetooth 5.1, and uses a Nano SIM card.

Is the Samsung Galaxy S21 Ultra still worth buying in 2026?

For buyers prioritising flagship camera capabilities and premium build quality at reduced prices, the S21 Ultra remains relevant. While newer models offer improved processors, the price reduction makes the older flagship competitive against current mid-range options.

Can I use S Pen with Samsung Galaxy S21 Ultra?

Yes, the Galaxy S21 Ultra was the first Galaxy S series device to support Samsung’s S Pen stylus, previously exclusive to the Galaxy Note line.

Does the Galaxy S21 Ultra have expandable storage?

No, the Galaxy S21 Ultra does not support microSD card expansion. Storage capacity is limited to the internal storage option selected at purchase (128GB, 256GB, or 512GB).

Jack Harry Clarke Harrison

About the author

Jack Harry Clarke Harrison

Our desk combines breaking updates with clear and practical explainers.