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Existing Customers

Apple Watch is available to O2 Pay Monthly customers with an iPhone 6s or newer (Apple Watch Series 4 also compatible with iPhone 6).

New Customers
New Customers

Before you can get your watch, you'll need to buy an iPhone 6s or newer (Apple Watch Series 4 also compatible with iPhone 6), with an O2 Pay Monthly tariff. Once you've done that, come back and you can add your watch.

Before you can get your watch, you'll need to buy an iPhone 6s or newer (Apple Watch Series 4 also compatible with iPhone 6), with an O2 Pay Monthly tariff. Once you've done that, come back and you can add your watch.

Samsung galaxy a51 camera display

48MP main camera

samsung galaxy a51 screen display

6.5 inch FHD+ Super AMOLED display

samsung galaxy a51 show casing a movie

Super-fast charging

Samsung Galaxy A51 in Blue back of phone

Available in Blue, only on O2

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Tech specs

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Reviews

Why O2

Why O2?

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The UK's No.1 Network▴

We're here for you whenever you need us.

So you can stay connected to the people that matter.

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Priority
Priority

On O2, you’re the headline act.

Priority gives you invite-only access to tickets, perks and experiences.

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My O2
My O2

Manage your account 24/7.

View your bills, see your data usage, check your upgrade options and more. Just sign in to My O2 online, or get the app for free.

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FAQs

FAQs

What are the Samsung Galaxy A51 specs?

The Samsung Galaxy A51 demonstrates to make a device big, devices don’t need to compromise on battery life. The Samsung Galaxy A51 has a jaw dropping 23 hours of talk-time, meaning with this device, you’ll never miss an opportunity to take a call from family, capture a precious moment or watch that all important penalty decider on your endless 6.5-inch FHD+ Super AMOLED display.

The Quad Rear Camera (48MP + 12MP Ultra-Wide + 5MP Macro + 5MP Depth) captures a beautiful range of colours and holds its own against some of the best smartphone cameras on the market - and a 32MP Front Camera gives you the perfect selfie.

With up to 92-hours of talk time and fast-charging capabilities, the Samsung Galaxy A51 packs serious power that can last all day.


What’s the screen size of the Samsung Galaxy A51?

The Samsung Galaxy A51 has a massive 6.5-inch FHD+ Super AMOLED display.


What’s the quality of the Samsung Galaxy A51 camera?

The Samsung Galaxy A51 has a Quad Rear Camera set up (48MP + 12MP Ultra-Wide + 5MP Macro + 5MP Depth). The Front Camera is also incredibly powerful and packs 32MP for some of the highest quality selfies available in a smartphone.


How much storage is there in the Samsung Galaxy A51?

The Samsung Galaxy A51 has 128GB of internal storage with possibilities for up to 512GB of external storage when you insert a Micro SD.


Is the Samsung Galaxy A51 Dual-SIM?

Yes, the Samsung Galaxy A51 is Dual-SIM capable – meaning it has a space for an additional SIM insertion. This allows you to have two numbers at any one time, what you choose to use them for is completely up to you.


How long is the Samsung Galaxy A51 battery life?

The Samsung Galaxy A51 has an amazingly long battery life, allowing for up to 92 hours of battery life in standby mode. In talk time, the Galaxy A51 offers up to 23 hours of talk time.


How much is the Samsung Galaxy A51 SIM-free?

The Samsung Galaxy A51 is available for purchase SIM-free now at O2.

For the most up to date pricing, see our website.


How much is the Samsung Galaxy on a Pay-monthly contract?

The Samsung Galaxy A51 is available now to buy on a Pay-monthly contract.

See the most up to date prices at O2.


The legal bit

Custom plans

RPI: Each year your Airtime Plan will be adjusted by the Retail Price Index (RPI) rate of inflation. Find out more at o2.co.uk/prices.

Direct purchases only. Pay the cash price for your device or spread the cost over 3 to 36 months (excludes dongles). The cost of your Device will be the same however long you choose. A minimum upfront cost may apply. You need a monthly rolling Airtime Plan for the length of the Device Plan. Pay off your Device Plan at any time without charge. You can then keep on your Airtime Plan, upgrade or leave. If your Airtime Plan ends for any reason (including for switching to another operator) you will need to pay your Device Plan in full.

UK calls/texts to standard UK landlines and mobiles and when roaming in our Europe Zone. Fair Usage policy applies. Special and out of bundle numbers chargeable. 4G phone required to access 4G. 4G available in selected areas.

Change your airtime tariff after 30 days and then once every billing month during your minimum contract period, choosing from a selected family of tariffs. Some tariff extras are only available on the starting tariff, are not transferable, and may be lost if you change to an ineligible tariff. Devices are subject to availability.

0% APR. Finance subject to status and credit checks, 18+, Direct Debit. Credit provided by Telefónica UK Ltd, SL1 4DX. Terms apply, see o2.co.uk/terms.

Get Unlimited Data

Each year your Airtime Plan will be adjusted on your April bill by the RPI rate of inflation announced in the preceding Feb. See o2.co.uk/prices.

Unlimited Data available on O2 Custom Plans on selected handsets and selected SIM Only tariffs. Fair use policy applies, personal and non-commercial usage only. If you regularly use 650GB of data per month or tether 12 or more devices we may consider this to be non permitted use and have the right to move you to a more suitable plan. EU roaming capped at 25GB per month, chargeable at £3.50 per GB afterwards. For full terms see www.o2.co.uk/terms.

*Each year your Airtime Plan will be adjusted on your April bill by the RPI rate of inflation announced in the preceding Feb. See o2.co.uk/prices.
▴Terms apply. Based on total number of connections to O2 network vs. number of connections to each of Vodafone, BT Group and Three as of 30.06.20. To verify, see o2.co.uk/network.