Customer Service

Track your order, update your details and claim your cashback all in your account.

No need to call us.

My Account
Contact Us

Sales Team
0330 678 1450

Buy online for fast, free and no contact delivery

Monday - Friday 8.00am - 8.00pm

Saturday & Bank Holidays - 9.00am - 5.30pm

Customer Services Team
0114 452 9665

Monday - Friday 9.00am - 8.00pm

Saturday 9.00am - 6.00pm

Sunday 10.00am - 5.00pm

or

Speak to our customer service agents via Live Chat

Alternatively email our agents by login into your My Account

My Account

Samsung Galaxy S21 Ultra Deals

Colour: Phantom Black 2 Colours Available Size: 128GB 2 Sizes Available
Colour
Size
Out of Stock
With the Samsung Galaxy S21 Ultra you can take stunning, crystal clear pictures with its impressive 108MP triple-lens camera. TV & movies look breathtakingly stunning on the 6.8-inch Dynamic AMOLED display, and the 5,000mAh battery will keep you streaming all day. All our Samsung Galaxy S21 Ultra Deals are available on contract, SIM Free or upgrade with next day delivery a standard. ... Read More
Product Details
Best Samsung Galaxy S21 Ultra deal on iD Mobile
Unlimited Minutes & Texts
Unlimited Data
£49.99 Monthly Cost
Upfront Cost £99.99
Get £150 Cashback
£10 OFF with code ID10

Our best Samsung Galaxy S21 Ultra contract deals

  • Price Drop Deal
    Unlimited Data
    Unlimited Minutes & Texts
    £49.99 Monthly Cost
    £10 OFF with code ID10
    Get £150 Cashback
    £99.99 Upfront Cost
    £49.99 Monthly Cost
  • Price Drop Deal
    100GB Data (5G)
    Unlimited Minutes & Texts
    £47.00 Monthly Cost
    £20 OFF with code DROP20
    Get £150 Cashback
    £290.00 Upfront Cost
    £47.00 Monthly Cost
  • Price Drop Deal
    20GB Data
    Unlimited Minutes & Texts
    £42.99 Monthly Cost
    £10 OFF with code ID10
    Get £150 Cashback
    £99.99 Upfront Cost
    £42.99 Monthly Cost
  • Price Drop Deal
    50GB Data
    Unlimited Minutes & Texts
    £43.99 Monthly Cost
    £10 OFF with code ID10
    Get £150 Cashback
    £99.99 Upfront Cost
    £43.99 Monthly Cost
  • Price Drop Deal
    Unlimited Data
    Unlimited Minutes & Texts
    £44.99 Monthly Cost
    £10 OFF with code ID10
    Get £150 Cashback
    £99.99 Upfront Cost
    £44.99 Monthly Cost
  • Price Drop Deal
    20GB Data
    Unlimited Minutes & Texts
    £48.99 Monthly Cost
    £10 OFF with code ID10
    Get £150 Cashback
    £49.99 Upfront Cost
    £48.99 Monthly Cost
  • Price Drop Deal
    50GB Data
    Unlimited Minutes & Texts
    £49.99 Monthly Cost
    £10 OFF with code ID10
    Get £150 Cashback
    £49.99 Upfront Cost
    £49.99 Monthly Cost
  • Price Drop Deal
    Unlimited Data
    Unlimited Minutes & Texts
    £50.99 Monthly Cost
    £10 OFF with code ID10
    Get £150 Cashback
    £49.99 Upfront Cost
    £50.99 Monthly Cost
  • Unlimited Data
    Unlimited Minutes & Texts
    £53.99 Monthly Cost
    Rollover unused data to the next month FREE
    £10 OFF upfront with code ID10
    Samsung Buds Plus Black included
    £49.99 Upfront Cost
    £53.99 Monthly Cost
  • Unlimited Data
    Unlimited Minutes & Texts
    £51.99 Monthly Cost
    Rollover unused data to the next month FREE
    £10 OFF upfront with code ID10
    Get a FREE Instax Mini Link Printer
    £99.99 Upfront Cost
    £51.99 Monthly Cost
  • Unlimited Data
    Unlimited Minutes & Texts
    £54.99 Monthly Cost
    Rollover unused data to the next month FREE
    £10 OFF upfront with code ID10
    Samsung Buds Live Black included
    £99.99 Upfront Cost
    £54.99 Monthly Cost
  • Price Drop Deal
    2GB Data (5G)
    Unlimited Minutes & Texts
    £17.00 Monthly Cost
    £20 OFF with code DROP20
    Get £150 Cashback
    £759.99 Upfront Cost
    £17.00 Monthly Cost
  • Price Drop Deal
    18GB Data (5G)
    Unlimited Minutes & Texts
    £23.00 Monthly Cost
    £20 OFF with code DROP20
    Get £150 Cashback
    £650.00 Upfront Cost
    £23.00 Monthly Cost
  • Price Drop Deal
    18GB Data (5G)
    Unlimited Minutes & Texts
    £26.00 Monthly Cost
    £20 OFF with code DROP20
    Get £150 Cashback
    £599.00 Upfront Cost
    £26.00 Monthly Cost
  • Price Drop Deal
    4GB Data (5G)
    Unlimited Minutes & Texts
    £20.00 Monthly Cost
    £20 OFF with code DROP20
    Get £150 Cashback
    £750.00 Upfront Cost
    £20.00 Monthly Cost
More Deals
 Loading

Everything you need to know about the Samsung Galaxy S21 Ultra

Samsung Galaxy S21 Ultra 5G Display

Samsung Galaxy S21 Ultra 5G Display

Level up with the Samsung Galaxy S21 Ultra 5G, featuring Samsung’s brightest ever Dynamic AMOLED 2x display. This dazzling 6.8-inch screen not only brings content to life with striking colour, it also boasts a 120Hz refresh rate to guarantee smooth and responsive scrolling.

The handset is sure to turn heads thanks to its premium metal frame and frosted haze finish, which makes fingerprints and smudges a thing of the past. With Gorilla Glass Victus shielding the handset, alongside an IP68 water resistance rating, you can also be sure of its durability.

Samsung Galaxy S21 Ultra 5G Camera

Samsung Galaxy S21 Ultra 5G Camera

Showcasing the most advanced camera system of the S21 series, the Samsung Galaxy S21 Ultra 5G features an extraordinary new 108MP sensor. Letting you capture incredible results, even at night, you can experience up to 100x zoom and 10x optical zoom, to pick out incredible detail.

There’s also the option to shoot ultra-high definition movies, with 8k video ready to record all the action. You can also say goodbye to endless photo retakes, by pulling your favourite high-res stills from your video recordings, using 8K Video Snap.

Samsung Galaxy S21 Ultra 5G Power

Samsung Galaxy S21 Ultra 5G Power

Make the most of everything 5G has to offer, with amazing power and reliability from the Samsung Galaxy S21 Ultra 5G. Boasting a high-performance Exynos 2100 5nm processor, it’s ready to keep up with your every task, from gaming marathons, to 5G multitasking.

The handset is ready to see you through a day of activity, courtesy of the massive 5000mAh battery on board. It has the ability to recharge in less time, using 25W SuperFast Charging or 15W Wireless Charging, as well as Wireless PowerShare to allow you to share charge with other devices.

Samsung Galaxy S21 Ultra 5G Features

Samsung Galaxy S21 Ultra 5G Features

The Samsung Galaxy S21 Ultra 5G is built for 5G, so you can experience every benefit of the next-generation network at your fingertips. It’s also the first S Series handset to be compatible with Samsung’s iconic S Pen (sold separately), offering both stylus and clicker functionality.

Whatever you use your handset for, you can expect all your files, content and downloads to be kept safe, with vault-like security from Samsung. The in-screen Ultrasonic Fingerprint Scanner lets you access your device in seconds, and can also be used to safely authorise Samsung Pay transactions.

Compare Samsung Galaxy S Range

Samsung
Galaxy S21 Ultra 5G
Samsung
Galaxy S21+ 5G
6.8-inch display 6.7-inch display
108MP triple camera 64MP triple camera
40MP selfie camera 10MP selfie camera
5000mAh battery 4800mAh battery
12GB RAM 8GB RAM
5G connectivity 5G connectivity
View Deals View Deals
Samsung
Galaxy S21 5G
Samsung
Galaxy S20 FE 5G
6.2-inch display 6.5-inch display
64MP multi lens camera 12MP triple camera
10MP selfie camera 32MP selfie camera
4000mAh battery 4500mAh battery
8GB RAM 6GB RAM
5G connectivity 5G connectivity
View Deals View Deals

Claim up to £150 cashback on selected Samsung products

Samsung Electronics (UK) Limited. UK, Channel Islands, Isle of Man and Republic of Ireland residents aged 18+ or registered companies only. Participants who purchase Promotion Products between 02.06.21 – 07.07.21 from Mobiles.co.uk are eligible to claim a cash back reward paid via bank transfer. Participants who purchase at least one additional Promotion Product shall be entitled to claim a cashback bonus of £50. Only one cashback bonus of £50 may be claimed. Claims must be submitted within sixty (60) days from the date of purchase at samsungpromotions.claims/summercashback, the date of purchase counts as day 1. Claims must only be made by the end user customer. Maximum 4 Claims per household and 10 per registered business during the Promotion Period. See samsungpromotions.claims/summercashback for full T&Cs.

Promotion Product Cashback amount
S21 Ultra 5G (128GB, 256GB, 512GB) £150.00
S21+ (128GB, 256GB) £120.00
S21 (128GB, 256GB) £100.00
A52 5G £50.00
A42 £40.00
Galaxy Watch3 LTE 41mm £70.00
Galaxy Watch3 LTE 45mm £70.00
Galaxy Buds Live £40.00

Product Reviews

4.8/5

5 Reviews

We want to give our customers real advice from real customers. Highlighting the good as well as the not so good points. Our customers are kind enough to take a few minutes out of their busy day to share their experience and opinions of their new smartphone, helping new customers make the right choice for them.

Verified Buyer

Well i was extremely happy with the delivery process, well done Mobiles UK, received my phone the next morning.

Only a Cable in the box and its not a USB at one end, looks like Samsung are cutting corners a 5$ plug would have helped me charge it, but i had to order a Plug and a USB cable.

Good phone ...but i have marked Value down by 1 star for Samsung not MobilesUk.

Verified Buyer

I bought the Phantom Black, beautiful phone. The 5g service in my area is pretty good and have been getting crazy speeds. Phone feels great, nice to use and the screen is crisp - camera is brilliant but processing not so refined. Phone is a bit on the heavy side too - takes a bit of getting used to.

Verified Buyer

In essence, this is without doubt, the most sophisticated and feature rich device, that I have owned.
The whole smart phone culture, has been enriched with this last addition.
I am solo happy I chose Galaxy S21 Ultra.

Verified Buyer

Good phone but not happy as they removed memory card slot.

Verified Buyer

Its amazing. Worth the investment.

Loading...