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At the end of the checkout process, you can book an O2 Guru to help you set up your phone.

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Existing Customers
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.

Vibrant display

Vibrant display

Heart rate notifications

Heart rate notifications

Active zone minutes

Active zone minutes

Sleep tracking and sleep score

Sleep tracking and sleep score

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Tech specs


Overall rating

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Why O2

Why O2?

O2 Support
Here to help you

Get help with your device.

Find the answers to your questions on our help and support pages. Get help with your device, O2 account and more.

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Bubl and O2
Get Priority

It’s good to be back.

From unique prize draws to unforgettable moments, Priority gives you invite-only access to gigs, perks and experiences.

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My o2
My O2

Manage your account 24/7.

Keep an eye on your bills and data usage and add a Bolt On if you need it. Get an upgrade, make a bill payment or top up your credit. You can do all this and more, wherever you are, with My O2. Sign in online or get the free My O2 app.

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What are the Fitbit Charge 5 specifications? Collapsed link

The Fitbit Charge 5 has a battery life of up to 7 days, so you don't have to worry about running out of charge whilst being on the go.

Monitor your heart health with the Fitbit 5 ECG app that assesses your heart for atrial fibrillation. Enjoy 20 different exercise modes, set personal goals and receive real-time stats to monitor your progress with the Charge 5.

A built-in GPS means you can see your real-time pace and distance during exercise without needing your phone. Plus, view a map of your workout route on the Fitbit app. Get a better night sleep with the Fitbit 5 Smart Wake.

Is the Fitbit Charge 5 waterproof? Collapsed link

The Fitbit 5 is water-resistant, meaning it can withstand a depth of up to 50 metres. Wear the Charge 5 in the pool or shower, but we don't advise you to take it diving!

What features are included in the Fitbit Charge 5 fitness tracker? Collapsed link

Enjoy a range fitness and health features with the Fitbit Charge 5 fitness tracker, including sleep tracking, a daily readiness score, built-in GPS, heart rate tracking, stress management score, skin temperature tracking and much more.

Does the Fitbit Charge 5 have GPS? Collapsed link

The Fitbit 5 has a built-in GPS for tracking your workouts in real-time. See your pace and distance with the Fit Charge 5 GPS and map your workout in the Fitbit app.

How do I charge the Fitbit 5? Collapsed link

Plug the charging cable into a USB charger, a computer or another low-energy charging device. Attach the tracker to the Fitbit 5 magnetically by holding the other end of the charging cable to the back of the tracker.

What devices are compatible with the Fitbit Charge 5? Collapsed link

Pair your Charge 5 with Apple iOS 13 or higher and Android 8.0+ with Bluetooth.

The legal bit

Apple Music offer

Apple Music: Get up to 6 months Apple Music when you buy an eligible product direct from O2 and spread the cost on a finance agreement (“Qualifying Purchase”). Redeem directly with Apple via redemption code provided to you within 7 days of Qualifying Purchase. All participants must redeem by 23rd June 2022. Redemption terms apply. O2 provides 3 month subscription (“Subscription Period”) added to any existing or new trial period of up to 3 months provided by Apple directly. You must set up Apple account and agree to Apple’s terms of use. You’ll be automatically enrolled on to a paid monthly subscription directly with Apple at the end of the Subscription Period. You cannot benefit from more than one subscription period with O2. Tariff eligibility criteria applies which includes being a UK resident and 18+. No cash or alternatives. Lost redemption codes will not be replaced. Offer may be withdrawn or amended at any time. Internet access required. For how to claim and full terms:

Spread the cost terms and conditions

0% APR Device Plan only available for selected devices and accessories purchased on Upfront payment required with the balance paid by monthly direct debit instalments over the term or pay it off early at any time. One eligible device per Plan. Device Plan is a consumer credit agreement and subject to status, eligibility and credit checks. 18+. Credit by Telefónica UK Ltd, SL1 4DX. Telefónica UK authorised and regulated by the FCA for consumer credit and insurance. Terms apply, see

*Each year your Airtime Plan will be increased by the Retail Price Index (RPI) rate of inflation announced in February plus 3.9%. If RPI is negative, we’ll only apply the 3.9%. You’ll see this increase on your April 2023 bill onwards. See