Phones / Samsung / Galaxy S23 Ultra

Samsung Galaxy S23 Ultra
Cheapest right now: £35.67/mo on O2 from O2 with £30.00 upfront.

Buy outright from £449.99 (O2)

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Samsung Galaxy S23 Ultra

1 retailer · 1 network · 256GB / 512GB

At a glance. The Samsung Galaxy S23 Ultra is currently sold on contract by O2, on O2. It is available in 2 storage sizes (256GB, 512GB); larger sizes add to the price, so pick the smallest you can live with. The cheapest deal by effective monthly cost is £35.67 a month with £30.00 upfront over 36 months on O2, which works out at about £28.50 a month all in. If you would rather buy it outright, the lowest SIM-free price we track is £449.99 from O2 — worth comparing against the contracts above, paired with a SIM-only plan. 48 of the deals are for refurbished handsets, which are usually noticeably cheaper; use the condition filter to compare new and refurbished separately. Key specs: 6.8" dynamic amoled 2x, a Qualcomm SM8550-AC Snapdragon 8 Gen 2 (4 nm) chip, IP68 water resistance.

Key specs

Screen6.8"
DisplayDynamic AMOLED 2X
Resolution1440 x 3080
ChipsetQualcomm SM8550-AC Snapdragon 8 Gen 2 (4 nm)
Front camera12 Megapixels
Water resistanceIP68 - Dust and water resistant over 1.5 meter and 30 minutes
Weight233g
Dimensions163.4 x 78.1 x 8.9 mm

Every contract for the Galaxy S23 Ultra, ranked by true cost

Sort by True monthly cost Monthly price Upfront cost Total cost Most data

48 deals match. Prices last checked 29 October 2026.

O2O2
Samsung Galaxy S23 Ultra
256GB · White, Black
Data5GB
MinutesUnlimited
TextsUnlimited
Term36 mths
5G Pre-owned, Grade A 3 months Free Disney+ O2 Priority Unlocked Phones Charge to mobile

Device plan £11.67/mo for 36 months, airtime £24.00/mo for 24 months

The whole bill36 months
Upfront£30.00
Device £11.67×36£420.12
Airtime £24.00×24£576
True cost£1,026.12
£28.50/mo real
Headline is honest See deal at O2
O2O2
Samsung Galaxy S23 Ultra
512GB · Black, Purple, White
Data5GB
MinutesUnlimited
TextsUnlimited
Term36 mths
5G Pre-owned, Grade A 3 months Free Disney+ O2 Priority Unlocked Phones Charge to mobile

Device plan £13.06/mo for 36 months, airtime £24.00/mo for 24 months

The whole bill36 months
Upfront£30.00
Device £13.06×36£470.16
Airtime £24.00×24£576
True cost£1,076.16
£29.89/mo real
Headline is honest See deal at O2
O2O2
Samsung Galaxy S23 Ultra
256GB · White, Black
Data30GB
MinutesUnlimited
TextsUnlimited
Term36 mths
5G Pre-owned, Grade A 3 months Free Disney+ O2 Priority Unlocked Phones Charge to mobile

Device plan £11.67/mo for 36 months, airtime £27.00/mo for 24 months

The whole bill36 months
Upfront£30.00
Device £11.67×36£420.12
Airtime £27.00×24£648
True cost£1,098.12
£30.50/mo real
Headline is honest See deal at O2
O2O2
Samsung Galaxy S23 Ultra
512GB · White, Black, Purple
Data30GB
MinutesUnlimited
TextsUnlimited
Term36 mths
5G Pre-owned, Grade A 3 months Free Disney+ O2 Priority Unlocked Phones Charge to mobile

Device plan £13.06/mo for 36 months, airtime £27.00/mo for 24 months

The whole bill36 months
Upfront£30.00
Device £13.06×36£470.16
Airtime £27.00×24£648
True cost£1,148.16
£31.89/mo real
Headline is honest See deal at O2
O2O2
Samsung Galaxy S23 Ultra
256GB · White, Black
Data125GB
MinutesUnlimited
TextsUnlimited
Term36 mths
5G Pre-owned, Grade A 3 months Free Disney+ O2 Priority Unlocked Phones Charge to mobile

Device plan £11.67/mo for 36 months, airtime £32.00/mo for 24 months

The whole bill36 months
Upfront£30.00
Device £11.67×36£420.12
Airtime £32.00×24£768
True cost£1,218.12
£33.84/mo real
Headline is honest See deal at O2
O2O2
Samsung Galaxy S23 Ultra
256GB · White, Black
Data5GB
MinutesUnlimited
TextsUnlimited
Term36 mths
5G Pre-owned, Grade A 6 months Free Disney+ O2 Priority Unlocked Phones Charge to mobile

Device plan £11.67/mo for 36 months, airtime £32.99/mo for 24 months

The whole bill36 months
Upfront£30.00
Device £11.67×36£420.12
Airtime £32.99×24£791.76
True cost£1,241.88
£34.50/mo real
Headline is honest See deal at O2
O2O2
Samsung Galaxy S23 Ultra
512GB · Black, Purple, White
Data125GB
MinutesUnlimited
TextsUnlimited
Term36 mths
5G Pre-owned, Grade A 3 months Free Disney+ O2 Priority Unlocked Phones Charge to mobile

Device plan £13.06/mo for 36 months, airtime £32.00/mo for 24 months

The whole bill36 months
Upfront£30.00
Device £13.06×36£470.16
Airtime £32.00×24£768
True cost£1,268.16
£35.23/mo real
Headline is honest See deal at O2
O2O2
Samsung Galaxy S23 Ultra
512GB · Black, Purple
Data5GB
MinutesUnlimited
TextsUnlimited
Term36 mths
5G Pre-owned, Grade A 6 months Free Disney+ O2 Priority Unlocked Phones Charge to mobile

Device plan £13.06/mo for 36 months, airtime £32.99/mo for 24 months

The whole bill36 months
Upfront£30.00
Device £13.06×36£470.16
Airtime £32.99×24£791.76
True cost£1,291.92
£35.89/mo real
Headline is honest See deal at O2
O2O2
Samsung Galaxy S23 Ultra
256GB · White, Black
Data30GB
MinutesUnlimited
TextsUnlimited
Term36 mths
5G Pre-owned, Grade A 6 months Free Disney+ O2 Priority Unlocked Phones Charge to mobile

Device plan £11.67/mo for 36 months, airtime £35.99/mo for 24 months

The whole bill36 months
Upfront£30.00
Device £11.67×36£420.12
Airtime £35.99×24£863.76
True cost£1,313.88
£36.50/mo real
Headline is honest See deal at O2
O2O2
Samsung Galaxy S23 Ultra
256GB · White, Black
DataUnlimited
MinutesUnlimited
TextsUnlimited
Term36 mths
Unlimited data 5G Pre-owned, Grade A 3 months Free Disney+ O2 Priority Unlocked Phones Charge to mobile

Device plan £11.67/mo for 36 months, airtime £37.00/mo for 24 months

The whole bill36 months
Upfront£30.00
Device £11.67×36£420.12
Airtime £37.00×24£888
True cost£1,338.12
£37.17/mo real
Headline is honest See deal at O2
O2O2
Samsung Galaxy S23 Ultra
512GB · Black, Purple, White
Data30GB
MinutesUnlimited
TextsUnlimited
Term36 mths
5G Pre-owned, Grade A 6 months Free Disney+ O2 Priority Unlocked Phones Charge to mobile

Device plan £13.06/mo for 36 months, airtime £35.99/mo for 24 months

The whole bill36 months
Upfront£30.00
Device £13.06×36£470.16
Airtime £35.99×24£863.76
True cost£1,363.92
£37.89/mo real
Headline is honest See deal at O2
O2O2
Samsung Galaxy S23 Ultra
512GB · Black, White, Purple
DataUnlimited
MinutesUnlimited
TextsUnlimited
Term36 mths
Unlimited data 5G Pre-owned, Grade A 3 months Free Disney+ O2 Priority Unlocked Phones Charge to mobile

Device plan £13.06/mo for 36 months, airtime £37.00/mo for 24 months

The whole bill36 months
Upfront£30.00
Device £13.06×36£470.16
Airtime £37.00×24£888
True cost£1,388.16
£38.56/mo real
Headline is honest See deal at O2
O2O2
Samsung Galaxy S23 Ultra
256GB · White, Black
Data125GB
MinutesUnlimited
TextsUnlimited
Term36 mths
5G Pre-owned, Grade A 6 months Free Disney+ O2 Priority Unlocked Phones Charge to mobile

Device plan £11.67/mo for 36 months, airtime £40.99/mo for 24 months

The whole bill36 months
Upfront£30.00
Device £11.67×36£420.12
Airtime £40.99×24£983.76
True cost£1,433.88
£39.83/mo real
Headline is honest See deal at O2
O2O2
Samsung Galaxy S23 Ultra
512GB · White, Black, Purple
Data125GB
MinutesUnlimited
TextsUnlimited
Term36 mths
5G Pre-owned, Grade A 6 months Free Disney+ O2 Priority Unlocked Phones Charge to mobile

Device plan £13.06/mo for 36 months, airtime £40.99/mo for 24 months

The whole bill36 months
Upfront£30.00
Device £13.06×36£470.16
Airtime £40.99×24£983.76
True cost£1,483.92
£41.22/mo real
Headline is honest See deal at O2
O2O2
Samsung Galaxy S23 Ultra
256GB · White, Black
Data5GB
MinutesUnlimited
TextsUnlimited
Term24 mths
5G Pre-owned, Grade A 3 months Free Disney+ O2 Priority Unlocked Phones Charge to mobile
The whole bill24 months
Upfront£30.00
Device £17.50×24£420
Airtime £24.00×24£576
True cost£1,026
£42.75/mo real
Upfront adds £1.25/mo See deal at O2

Buy the Galaxy S23 Ultra outright

Pair it with a SIM-only plan. Whether that beats a contract depends on the phone — see the verdict above.

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