Get unlimited data and £100 cashback with these cheap Samsung Galaxy S21 deals

Samsung Galaxy 21 deals
(Image credit: Future)

Samsung Galaxy S21 deals have come down in price considerably since they first launched back in January this year. However, out of all of the contracts we've seen on this device, iD Mobile's latest offer is easily one of the best.

iD Mobile is offering the Samsung Galaxy S21 for just £34.99 a month. That's one of the cheapest prices on the market right now for this device. Despite that low price point, iD is supplying a completely unlimited data, calls and texts plan.

Reducing that price even further, Samsung is currently offering £100 in cashback when you purchase this device. That effectively brings the cost of this device down to around £30.82 a month. 

Samsung Galaxy S21 deals + £100 cashback

Samsung Galaxy S21: at iD mobile | FREE upfront | unlimited data, calls and texts | £34.99pm

Samsung Galaxy S21: at iD mobile | FREE upfront | unlimited data, calls and texts | £34.99pm
Right now this is easily the best price available for the Samsung Galaxy S21. With nothing to pay upfront and only £34.99 a month bills, this stands out as one of the cheapest prices for the handset. And yet, iD Mobile is getting you a completely unlimited data, calls and texts plan on a 5G network. On top of all of that, Samsung is offering £100 in cashback on this handset right now, effectively bringing your monthly bills down to around £30.82 a month.

What's the Samsung Galaxy S21 range like?

Samsung Galaxy S21:
The cheapest of the three handsets in Samsung's flagship series, the S21 is a 5G handset at a price that rivals the iPhone 12 and is much cheaper than the S20 was on launch.

Despite that lower price tag, you're getting Samsung's new Exynos 2100 processor. That's a super-powerful chip powering Samsung's already impressive camera software and operating system.

The camera is an incremental upgrade on what the S20 provided, boosting the 8K video software, super steady video, and an improved 60fps 'Director's View'. Thanks to the new processor, the camera's AI software is working better than ever.

However, Samsung hasn't managed to improve the battery capacity which could prove a problem with all of this new software.

Is iD Mobile a good network?

iD Mobile doesn't quite have the name recognition of Three or EE, but it's actually Carphone Warehouse's very own network. It specialises in affordable plans and while it normally offers smaller data plans for low costs, it has gone all out for this unlimited data offer.

iD piggybacks off the Three network. This means you'll get exactly the same speeds, coverage and reach that is offered by Three.

On top of this, there is the obvious benefits of the 1-month rolling contracts on certain plans, use of tethering, unlimited calls and texts and roaming in 50 destinations across the world.

Alex Hughes

Alex is a journalist who has written extensively about all things broadband, SIMs and phone contracts, as well as scouring the internet to land you the best prices on the very latest in gadgets and tech. Whether that be with the latest iPhones and Android handsets, breaking down how broadband works or revealing the cheapest SIM plans, he's in the know, and will help you land a bargain.

Read more
Samsung Galaxy S25 Ultra on grey background with big savings text overlay
Samsung's Galaxy S25 preorder deal has exceeded my expectations - it's not just a trade-in rebate
Samsung Galaxy S25 ultra
Score the excellent Galaxy S25 Ultra for just $399 with Samsung's exclusive deal
Samsung Galaxy S25 Ultra on orange background with don't miss text overlay
This could be last call for Samsung's incredible Galaxy S25 Ultra deal - get $900 off plus $300 store credit on the house
Samsung Galaxy S23 on purple background
The best Samsung Galaxy S23 deals for February 2025: free devices, cheap plans
Samsung Galaxy S24 Ultra and Galaxy S24 on grey background
The best Samsung Galaxy S24 deals for March 2024: free devices, plans, and more
Samsung Galaxy S25 blueblack online exclusive color on pink background with lowest price text
Get a huge $500 off the Galaxy S25 with this limited-time trade-in deal at Samsung
Latest in Samsung Galaxy Phones
The Samsung Galaxy S25 Edge on display the January 22, 2025 Galaxy Unpacked event.
Samsung Galaxy S25 Edge colors seemingly revealed in new video, and there’s another sign of an imminent launch
Samsung Galaxy S25 on a blue deals background
Bored with your iPhone? The ‘incredible’ Samsung Galaxy S25 just hit a record-low price in the Amazon Spring Sale
Samsung Galaxy Z Flip 6 in blue
5 things I want from the Samsung Galaxy Z Flip 7
Samsung Galaxy S25 from the front
The Now Bar on Samsung One UI 7 is about to get a lot more useful – and could soon match Live Activities on iOS
The Samsung Galaxy S25 Edge on display the January 22, 2025 Galaxy Unpacked event.
A fresh Samsung Galaxy S25 Edge leak hints at a 2K display and a titanium frame
Samsung Galaxy Z Fold 6 in Paris in front of the Louvre pyramid
I switched to a Samsung Galaxy Z Fold 6 five months ago and I haven’t looked back – here are five things you need to know before buying a foldable phone
Latest in News
Buzz Lightyear Space Ranger Spin Rennovations
Disney’s giving a classic Buzz Lightyear ride a tech overhaul – here's everything you need to know
Hisense U8 series TV on wall in living room
Hisense announces 2025 mini-LED TV lineup, with screen sizes up to 100 inches – and a surprising smart TV switch
Nintendo Music teaser art
Nintendo Music expands its library with songs from Kirby and the Forgotten Land and Tetris
Opera AI Tabs
Opera's new AI feature brings order to your browser tab chaos
An image of Pro-Ject's Flatten it closed and opened
Pro-Ject’s new vinyl flattener will fix any warped LPs you inadvertently buy on Record Store Day
The iPhone 16 Pro on a grey background
iPhone 17 Pro tipped to get 8K video recording – but I want these 3 video features instead