Galaxy S23 Ultra1000 GB•Grey

4.8/5(589 reviews)

£976.52

Save £622.48

Standard Delivery by 14 - 16 OctExpress Delivery by 12 Oct for £12.00

Restored professionally

Based on up to 100-points of inspection

The PhoneMart Promise

Based on up to 100-points of inspection

We measure each battery's health and capacity against strict standards, and replace any that don't make the grade, so you get power you can rely on all day.
The display is switched on and looked over closely for any blemishes, so there are no marks, dust spots or discolouration to spoil the view.
Where a charger is included, the cord and connectors are checked for wear, and the plug is confirmed to fit sockets.
Before it ships, every device gets a thorough professional clean and polish so it feels fresh in your hands.
Every lens is put to work, so we can confirm sharp photos, smooth video and reliable performance on video calls.
A full factory reset wipes the device clean, securely erasing all previous data and restoring the original settings.
We confirm the network status up front, so you know exactly whether the device is locked or unlocked before it arrives.
Cards are inserted to make sure the device reads SIM and memory cards correctly, and that every tray and slot works smoothly.
Each button is pressed to check it responds straight away and does exactly what it should, from volume to lock to power.
If any parts are fitted during refurbishment, they are tested for compatibility and held to the same standards as the originals.
We run the IMEI to confirm it is clean and never blacklisted, and that the device details match the manufacturer's records.
The moisture indicator inside the device is inspected to rule out any history of water or liquid damage.
Every port, including the headphone, USB and Ethernet connections, is checked to make sure it connects and works reliably.
Face and fingerprint unlock, along with any voice recognition, are tested to make sure they work quickly and accurately.
Positioning is checked for accurate GPS, so maps and location apps behave exactly as they should.
External sensors, such as proximity, brightness, laser measurement and heart rate, are checked for precise and responsive readings.
Screws, casing, frames and other mechanical parts are examined to confirm they are original or quality replacements, and any replacement has to match or beat industry standards.
We confirm that Wi-Fi and Bluetooth connect quickly and hold a stable signal.
Speakers and microphones are inspected and fine tuned so audio records and plays back clearly.
The flash and every indicator light are tested to confirm they light up and work correctly.
Any features that are specific to your device are checked against the same standards, so nothing gets missed.

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Body

Almost no signs of useVerified partsBattery for daily use

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Galaxy S23 Ultra

Excellent
Standard battery
Grey
1000 GB
Dual Physical SIM + eSIM

£976.52

£1,599.00 newSave £622.48

14-day returns

Set up the return in just a few clicks in your PhoneMart account.

Send the device back within 14 days of receiving it. Return postage is paid by you unless the item is faulty, damaged or not what you ordered.

Get your cash back within 3 business days of the seller receiving the device.

Proudly refurbished by PhoneMart Privacy policy

Comes with

Compatible charging cable

Excellent-Standard battery-Grey-1000 GB-Dual Physical SIM + eSIM

£976.52

£1,599.00 newSave £622.48

£976.52

£1,599.00 newSave £622.48

Customer reviews for Galaxy S23 Ultra

Overall rating

4.8/5

589 verified reviews

Rating details

Appearance: 4.8/5
Battery: 4.7/5
Delivery: 4.9/5

Top reviews with photos

Reviews

Alan Tate

Verified purchase

5/5

Reviewed 02/12/2024, United Kingdom.

This has to be a scam. I bought a phone marked as FAIR condition and it looks better than what I'd expect from an EXCELLENT one. No scratches or marks at all and the battery is outstanding. This is almost too good to be true. Thanks PhoneMart, you guys are crazy.

Galaxy S23 Ultra 512GB Beige Unlocked | PhoneMartSee item

Condition GoodPurchased 30/11/2024

Tom Kelly

Verified purchase

5/5

Reviewed 22/11/2024, United Kingdom.

I'm really happy with the phone and the service. This is the third phone I've bought here and I'll keep coming back.

Galaxy S23 Ultra 1TB Black Unlocked | PhoneMartSee item

Condition FairPurchased 23/10/2024

David Pearson

Verified purchase

5/5

Reviewed 01/09/2026, United Kingdom.

The delivery was quick. The phone was described as fair condition and had only a small scuff on the screen and one tiny scratch. The battery life is excellent and overall it was better than I expected.

Galaxy S23 Ultra 256GB Black Unlocked | PhoneMartSee item

Condition FairPurchased 24/08/2026

Minto Clarke

Verified purchase

5/5

Reviewed 31/08/2026, United Kingdom.

I am very happy with the device. It is great, thank you.

Galaxy S23 Ultra 256GB Grey Unlocked | PhoneMartSee item

Condition PremiumPurchased 22/08/2026

Anthony Smith

Verified purchase

5/5

Reviewed 30/08/2026, United Kingdom.

Currently running well.

Galaxy S23 Ultra 256GB Black Unlocked | PhoneMartSee item

Condition FairPurchased 14/08/2026

Emad Andrews

Verified purchase

5/5

Reviewed 29/08/2026, United Kingdom.

The device is in excellent condition and works well.

Galaxy S23 Ultra 256GB Beige Unlocked | PhoneMartSee item

Condition FairPurchased 04/08/2026

Paul Bell

Verified purchase

5/5

Reviewed 29/08/2026, United Kingdom.

Very good quality. Excellent.

Galaxy S23 Ultra 512GB Grey Unlocked | PhoneMartSee item

Condition GoodPurchased 20/08/2026

Peter Sanders

Verified purchase

5/5

Reviewed 28/08/2026, United Kingdom.

excellent

Galaxy S23 Ultra 256GB Black Unlocked | PhoneMartSee item

Condition FairPurchased 19/08/2026

Sabr Matthews

Verified purchase

5/5

Reviewed 28/08/2026, United Kingdom.

It’s amazing

Galaxy S23 Ultra 256GB Black Unlocked | PhoneMartSee item

Condition FairPurchased 15/08/2026

Kerry Franklin

Verified purchase

5/5

Reviewed 28/08/2026, United Kingdom.

I'm happy with my phone. It looked brand new when it arrived and everything is working well so far.

Galaxy S23 Ultra 256GB Purple Unlocked | PhoneMartSee item

Condition ExcellentPurchased 19/08/2026

Common questions about the Galaxy S23 Ultra

Durability

Overall performance

Camera

Screen quality

Grey

Colour

1000 GB

Storage

Dual Physical SIM + eSIM

Sim

Unlocked

Carrier compatibility

12 GB GB

Memory gb

Mobile network

6.8 inch

Screen size in

Dual Physical SIM + eSIM

Sim card

2023

Year of release

The Galaxy S23 Ultra is designed to deliver a spacious and immersive mobile experience with its 6.8 inch screen. Whether you're streaming videos, browsing your favourite apps, or juggling multiple tasks, this phone offers the room and speed to keep you productive and entertained throughout the day.

Released in 2023, the Galaxy S23 Ultra puts versatility in your hands with its unlocked carrier status and dual SIM options. With 12GB of memory, it handles demanding apps smoothly, while 5G connectivity ensures you stay connected with fast download and streaming speeds wherever you go.

Key features

Carrier compatibility: Unlocked for any network
Memory gb: 12 GB keeps multitasking smooth
Mobile network: 5G for fast downloads and streaming
Screen size in: 6.8 offers expansive viewing
Sim card: Dual Physical SIM plus eSIM for versatile use
Year of release: 2023, a proven design

Who is this for?

The Galaxy S23 Ultra suits users who want a large, clear display for video, gaming, or multitasking with multiple apps open at once. If you rely on fast mobile networks and like the flexibility of managing two phone numbers or plans at the same time, this phone fits right in.

Professionals who need a reliable device with ample memory will appreciate the 12GB RAM that keeps apps responsive. Anyone wanting an unlocked phone ready for use on any compatible network will find this model ready to go.

What you get and what to know

What you get	Good to know
Unlocked carrier ready for any network	Large screen sized for wide viewing
12GB RAM for smooth multitasking	No accessories specifically included
Dual SIM physical plus eSIM options	5G network for fast connections

Why buy it refurbished?

Choosing a refurbished Galaxy S23 Ultra supports sustainability by extending the life of quality electronics and reducing waste. Every device is inspected thoroughly by professionals through up to a 100 point check to ensure it works as expected.

Refurbished phones from PhoneMart come fully reset and ready to use, with a 24 month warranty, free delivery, and a 14 day return option. Buying refurbished offers strong value while helping the environment.

ColourGrey

Storage1000 GB

SimDual Physical SIM + eSIM

Carrier compatibilityUnlocked

Memory gb12 GB GB

Mobile network5G

Screen size in6.8 inch

Sim cardDual Physical SIM + eSIM

Year of release2023

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Galaxy S23 Ultra1000 GB•Grey

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Customer reviews for Galaxy S23 Ultra

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Rating details

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Common questions about the Galaxy S23 Ultra

Key features

Who is this for?

What you get and what to know

Why buy it refurbished?

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