Samsung Galaxy S26 Ultra: explore UK contract deals

No upfront costs

We've looked at all of the Samsung Galaxy S26 Ultra contracts available this April with no upfront costs and whittled them down to a choice of the best options for a variety of data needs. Here's what we've come up with:

We think this deal from Tesco Mobile offers the best value for no upfront cost with a small amount of data:

Unlimited minutes + Unlimited texts +  3GB data (5G) =  £51.99 a month, £0 up front (36‑month contract)
See full deal

🛈 Increased to: £55.63 on April 1 2027

Or you can get a chunkier 60GB of data for your Samsung Galaxy S26 Ultra by taking VOXI's plan here, which still has nothing to pay up front:

Unlimited minutes + Unlimited texts +  60GB data (5G) =  £54.30 a month, £0 up front (36‑month contract)
See full deal

🛈 VOXI reserve the right to increase the cost of this airtime plan annually with one month's notice

This Tesco Mobile deal with 100GB gives you plenty of data to get on with, without costing anything today:

Unlimited minutes + Unlimited texts +  100GB data (5G) =  £64.49 a month, £0 up front (36‑month contract)
See full deal

🛈 Increased to: £69.00 on April 1 2027

This is the most-competitive of the largest data plans available with the Galaxy S26 Ultra this month:

Unlimited minutes + Unlimited texts +  250GB data (5G) =  £66.99 a month, £0 up front (36‑month contract)
See full deal

🛈 Increased to: £71.68 on April 1 2027

Or for full-on unlimited data without paying anything up front, we think this Samsung Galaxy S26 Ultra deal on Tesco Mobile is the most competitive option this April:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) =  £69.49 a month, £0 up front (36‑month contract)
See full deal

🛈 Increased to: £74.35 on April 1 2027

Useful link: Compare all no upfront cost deals above

Unlimited data

We've searched through all the networks that offer unlimited data with their Galaxy S26 Ultra contracts this April. Below, we pick through the best-value option from each provider:

Our first pick would be this £44.99 a month deal from iD Mobile with £129 to pay up front:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) =  £44.99 a month, £129 up front (24‑month contract)
See full deal

🛈 Increased to: £46.49 on April 1 2028.
Increased to: £47.99 on April 1 2029

Or for a next best alternative, take a look at O2's unlimited data deal below at £52.40 a month:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) =  £52.40 a month, £30 up front (48‑month contract)
See full deal

🛈 Monthly airtime plan price will increase each April by the Retail Price Index rate of inflation published in February + 3.9%

While here's the best option on Vodafone to get the Samsung Galaxy S26 Ultra with unlimited data:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) =  £49 a month, £169 up front (24‑month contract)
See full deal

🛈 Increased to: £50.80 on April 1 2027.
Increased to: £52.60 on April 1 2028

Then it's giffgaff's unlimited data plan here:

Unlimited minutes + Unlimited texts +  Always On data (5G) =  £61.78 a month, £25 up front (36‑month contract)
See full deal

🛈 giffgaff reserve the right to increase the cost of this phone's airtime plan annually with one month's notice

Next is this from Three:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) =  £66.50 a month, £50 up front (36‑month contract)
See full deal

🛈 Increased to: £68.00 on April 1 2028.
Increased to: £69.50 on April 1 2029

And finally, it's Tesco Mobile, whose £69.49 a month unlimited data contract below we find the least competitive:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) =  £69.49 a month, £0 up front (36‑month contract)
See full deal

🛈 Increased to: £74.35 on April 1 2027

And that's it for networks offering the Samsung Galaxy S26 Ultra with unlimited data. There may be more combos of data speed, contract length and upfront costs though, so use our comparison tool further at the top.

Useful link: Compare all unlimited data deals above

giffgaff's Galaxy S26 Ultra deals start from £41.92 a month

From our most recent check, the Samsung Galaxy S26 Ultra is currently available in Black, Sky Blue, Cobalt Violet and White on giffgaff. They have it in two choices of memory: 256GB and 1TB.

giffgaff offer the Galaxy S26 Ultra on 36 or 24‑month contracts but it's only possible to get it directly with them - none of the re-sellers like Carphone Warehouse offer giffgaff deals for it.

giffgaff's best Samsung Galaxy S26 Ultra deals

✔ Best overall deal

Here's the giffgaff deal we think is the best value at the moment for the Galaxy S26 Ultra:

Unlimited minutes + Unlimited texts +  75GB data (5G) =  £46.78 a month, £25 up front (36‑month contract)
See full deal

🛈 giffgaff reserve the right to increase the cost of this phone's airtime plan annually with one month's notice

✔ Unlimited data

You can get the Samsung Galaxy S26 Ultra with unlimited data on giffgaff. Here's their current best deal for that:

Unlimited minutes + Unlimited texts +  Always On data (5G) =  £61.78 a month, £25 up front (36‑month contract)
See full deal

🛈 giffgaff reserve the right to increase the cost of this phone's airtime plan annually with one month's notice

On a pay monthly deal, you're looking at prices between £41.92 - £108.50 per month on giffgaff, depending on the minutes, texts and data you want. And that's with £25 - £200 upfront costs.

Useful link: Compare all giffgaff's Galaxy S26 Ultra deals

iD Mobile offer 505x Galaxy S26 Ultra deals starting from £29.99

On iD Mobile, our latest search of all their deals found that the Samsung Galaxy S26 Ultra is available in Black, Cobalt Violet, Sky Blue and White at the moment. Memory-wise, they've got the 256GB, 512GB and 1TB versions.

The Galaxy S26 Ultra only comes on one length of contract with iD Mobile (24 months) but you can get it on their network by joining direct or via the Carphone Warehouse re-sellers.

iD Mobile's best Samsung Galaxy S26 Ultra deals

✔ Best overall deal

The deal below is iD Mobile's current most competitive plan for the Galaxy S26 Ultra:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) =  £44.99 a month, £129 up front (24‑month contract)
See full deal

🛈 Increased to: £46.49 on April 1 2028.
Increased to: £47.99 on April 1 2029

✔ Unlimited data

iD Mobile's best unlimited data plan for the Samsung Galaxy S26 Ultra is the same as our overall favourite deal above.

Depending on the amount of minutes, texts and data you want in your deal, monthly costs on iD Mobile range between £29.99 - £68.99 (with £9 - £849 upfront costs).

Useful link: Compare all iD Mobile's Galaxy S26 Ultra deals

O2's Galaxy S26 Ultra deals start at £48.40 a month

Looking at their latest deals in April, if you want the Samsung Galaxy S26 Ultra from O2, they've currently got it in Black, Sky Blue, Cobalt Violet and White. And they've got it in the 256GB, 512GB and 1TB memory versions.

O2 sell the Samsung Galaxy S26 Ultra on four contract lengths: 48, 36, 24 or 12 months but you can't get it on a contract with them via re-sellers like Carphone Warehouse, you have to join directly.

O2's best Samsung Galaxy S26 Ultra deals

✔ Best overall deal

This is O2's current most-competitive plan for the Galaxy S26 Ultra, from our most recent comparison:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) =  £52.40 a month, £30 up front (48‑month contract)
See full deal

🛈 Monthly airtime plan price will increase each April by the Retail Price Index rate of inflation published in February + 3.9%

✔ Unlimited data

If you want unlimited data with your Samsung Galaxy S26 Ultra, our top-pick on O2 is the same as our overall best deal above.

The monthly costs on O2 range between £48.40 - £166.74 according to the amount of minutes, texts and data you want. You're looking at paying £30 too.

Useful link: Compare all O2's Galaxy S26 Ultra deals

Tesco Mobile: get the Galaxy S26 Ultra from £46.99 a month

Our latest search of their deals finds that Tesco Mobile currently have the Samsung Galaxy S26 Ultra in Black, Sky Blue, Cobalt Violet and White. And there's only a choice of one memory variant: 512GB.

There's five choices of contract length for the Galaxy S26 Ultra on Tesco Mobile: 36, 30, 24, 18 or 12 months but you can only get it from them directly, they don't offer contracts via Carphone Warehouse or similar re-sellers.

Tesco Mobile's best Samsung Galaxy S26 Ultra deals

✔ Best overall deal

We think this is currently Tesco Mobile's most competitive plan for the Galaxy S26 Ultra:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) =  £77.39 a month, £0 up front (30‑month contract)
See full deal

🛈 Increased to: £82.81 on April 1 2027

✔ Unlimited data

The best Samsung Galaxy S26 Ultra plan with unlimited data from Tesco Mobile is the same as the one we've chosen as their best overall deal above.

Price-wise, Tesco Mobile have contracts priced ranging between £46.99 - £148.47 a month (with £0 - £180 upfront), depending on the minutes, texts and data you want.

Useful link: Compare all Tesco Mobile's Galaxy S26 Ultra deals

Three's Galaxy S26 Ultra contracts currently start at £30.42 a month

Looking at Three's current pay monthly contracts for April, they have the Samsung Galaxy S26 Ultra in Black, Sky Blue, Cobalt Violet and White. And they stock the 256GB and 512GB versions of it.

You've only got one contract length choice of 36 months for the Galaxy S26 Ultra on Three and they don't sell contracts for it via any re-sellers like Carphone Warehouse, you can only join directly.

Three's best Samsung Galaxy S26 Ultra deals

✔ Best overall deal

Here's the Three Galaxy S26 Ultra deal that stacks up best against other providers:

Unlimited minutes + Unlimited texts +  150GB data (5G) =  £47.50 a month, £50 up front (36‑month contract)
See full deal

🛈 Increased to: £49.00 on April 1 2028.
Increased to: £50.50 on April 1 2029

✔ Unlimited data

For unlimited data with your Samsung Galaxy S26 Ultra plan on Three, this is the deal we think is the best value this April:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) =  £66.50 a month, £50 up front (36‑month contract)
See full deal

🛈 Increased to: £68.00 on April 1 2028.
Increased to: £69.50 on April 1 2029

Their contracts are priced between £30.42 - £86.50 a month, depending on amount of minutes, texts and data in the plan. And you'll pay from £50 - £850 up front too.

Useful link: Compare all Three's Galaxy S26 Ultra deals

Vodafone have 460 deals for the Galaxy S26 Ultra

From our most recent check, the Samsung Galaxy S26 Ultra is currently available in Black, Sky Blue, Cobalt Violet and White on Vodafone. They have it in three choices of memory: 256GB, 512GB and 1TB.

Vodafone offer the Galaxy S26 Ultra on 24 or 36‑month contracts and it's possible to get it either directly with them, or via the re-sellers Carphone Warehouse and Mobiles.co.uk.

Vodafone's best Samsung Galaxy S26 Ultra deals

✔ Best overall deal

This is the most competitive Vodafone plan for the Galaxy S26 Ultra, compared against other networks:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) =  £53 a month, £105 up front (24‑month contract)
See full deal

🛈 Increased to: £55.50 on April 1 2027.
Increased to: £58.00 on April 1 2028

✔ Unlimited data

Our favourite unlimited data deal for the Samsung Galaxy S26 Ultra on Vodafone is the one above in the best overall deal section.

On a pay monthly deal, you're looking at prices between £29 - £113.58 per month on Vodafone, depending on the minutes, texts and data you want. And that's with £9 - £820 upfront costs.

Useful link: Compare all Vodafone's Galaxy S26 Ultra deals

VOXI's Galaxy S26 Ultra deals start from £54.30 a month

On VOXI, our latest search of all their deals found that the Samsung Galaxy S26 Ultra is available in Black and Cobalt Violet at the moment. Memory-wise, they've only got the 512GB version.

The Galaxy S26 Ultra only comes on one length of contract with VOXI (36 months) and the only way to get it on their network is by joining direct, there's no option to join via any re-sellers.

VOXI's best Samsung Galaxy S26 Ultra deals

✔ Best overall deal

Here's the VOXI deal we think is the best value at the moment for the Galaxy S26 Ultra:

Unlimited minutes + Unlimited texts +  60GB data (5G) =  £54.30 a month, £0 up front (36‑month contract)
See full deal

🛈 VOXI reserve the right to increase the cost of this airtime plan annually with one month's notice

✖ Unlimited data

VOXI don't offer the Samsung Galaxy S26 Ultra on an unlimited data plan.

Depending on the amount of minutes, texts and data you want in your deal, monthly costs on VOXI range £54.30 (all with no upfront costs).

Useful link: Compare all VOXI's Galaxy S26 Ultra deals