O2 has been one of the best networks in the UK for some time. It's the network that's renowned for its extra Priority reward giveaways. And if you switch to the O2 network you obviously want to be sure you're getting the best deals that O2 has to offer, and that's where this page comes in!
We've rounded up all of the best O2 phone deals on the best handsets - from iPhones to the Samsung Galaxy S9, and its exclusive on the OnePlus 6 - this month so that you can find the best prices and plans for your needs.
And if you're still not sure about O2, you can browse the best phone deals at other networks, too - simply head to our best mobile phone deals page.
And if the deal you've found is being offered by retailer Mobiles.co.uk and costs at least £10 upfront, then make sure you enter our exclusive 10OFF discount code at the checkout to knock a tenner off (not yet available on the iPhone X, Galaxy S9 or S9 Plus).
The best iPhone 8 deals on O2:
Thanks to the spectacle that was the iPhone X launch, the reception for the iPhone 8 was a little bit flat. Perhaps unfairly - it improves on the iPhone 7 with wireless charging and an improved camera. Plus, it's quite a bit cheaper. So if you're looking for the best iPhone but balk at the iPhone X expense, try the 8 on for size instead.
iPhone 8 64GB | £99.99 upfront | 15GB data | Unlimited calls and texts | £34pm
O2 is so often the go-to network where decent data plans on the iPhone 8 are concerned. The best of those at the moment comes from Carphone Warehouse and it's 15GB of data a month tariff. Unlike many, this has actually just fallen in price. So at £34 a month and a penny less than £100 to pay at the start, this is one of the cheapest ways to go for the iPhone 8 right now. Total cost over 24 months is £915.99
iPhone 8 256GB | £109 upfront | 50GB data | Unlimited calls and texts | £49pm
This is for people who mean serious business; for those who really want to have their cake and eat it. An O2 tariff that provides a massive 50GB of data per month, for Apple's MASSIVE 256GB iPhone 8. It's obviously a lot of cash, so do ensure that you really need all this data and memory. Total cost over 24 months is £1285
The best Samsung Galaxy S9 deals on O2:
OK, so the Samsung Galaxy S9 doesn't make massive strides on the S8, but that doesn't mean it's not still one of the premier Android phones on the market. The cameras in particular are awe inspiring and tangible improvements have been made to the biometrics and position of the fingerprint scanner.
Samsung Galaxy S9 | FREE upfront | 10GB data | Unlimited minutes and texts | £32pm
We're delighted to say that we arranged with Mobile Phones Direct to give this fantastic tariff exclusively to Techradar readers. It has got to be the best S9 deal on O2 right now. 10GB is healthy and the balance between upfront cost (i.e. nothing at all) and monthly bills is very attractive. And because you'll be on the oxygenated network, it means you'll be privy to its Priority rewards, too. Total cost over 24 months is £768
Samsung Galaxy S9 | FREE upfront | 30GB data | Unlimited minutes and texts | £38pm
O2 and EE are leading the way when it comes to big data, with 30 glorious gigabytes of data to stream, surf and download with every month. We're scratching our head as to how you could possibly use more data than that each month. Total cost over 24 months is £912
The best iPhone X deals on O2:
Oh gosh, Apple went and did it. After years upon years of incremental upgrades, it finally made something special to celebrate the 10th anniversary of the iPhone. For the iPhone X it has dropped the bezel altogether, while the 5.8-inch Super Retina HD is scarily good. And if you tuned into the launch event and liked the look of Animojis, well there's that as well!
iPhone X 64GB | £70.99 upfront | 50GB data | Unlimited minutes and texts | £60pm
If you're determined to get your new iPhone X contract on O2 and need stacks of data, then this Mobile Phones Direct deal may be a pretty good fit. OK, we know that £60 per month is a lot to pay for a mobile phone. But this is the game-changing iPhone X we're talking about! 50GB of data is just massive, and at least you don't have to pay much upfront. Total cost over 24 months is £1510.99
The best Samsung Galaxy Note 9 deals and Note 8 deals on EE:
Samsung has now well and truly put the flaming memory of the Note 7 behind it. If the Note 8 was exceptional (6.3-inch infinity display and 6GB RAM), then the Samsung Galaxy Note 9 is even bigger and better (6.4-inch infinity display and 8GB RAM). If you want the best big screen Android phones on the market, then look no further.
Samsung Galaxy Note 9 | £160 upfront | 30GB data | Unlimited minutes and texts | £46pm
This immediately jumps out at us as the very best Samsung Note 9 deal you can pre-order today. It's actually less than we predicted in the run up to launch, with monthly bills coming in under the £50-mark. The upfront price is high, but check out all of that beautiful data. A fair price on a phone this good...and big! Total cost over 24 months is £1264
Samsung Galaxy Note 8 | FREE upfront | 50GB data | Unlimited minutes and texts | £49pm
Ok, so EE has everybody beaten to the punch on the Note 8 at the moment and it's hard to imagine anybody matching its best price at the moment. But if your Sportify, Netflix and podcast habits require even more data, then this is a very good tariff to jump to. We can barely envisage how anybody would really need more than 50GB of data every 30 days. And the monthly payments still come in at less than £50. Total cost over 24 months is £1176
The best iPhone 7 deals on O2:
The new iPhone 7 is another smash hit mobile phone from Apple thanks to further design enhancements. It's now waterproof, has a better screen and stereo speakers. The long-rumoured dropping of the headphone jack has become a reality. Memory capacity has been given a boost now, with the smallest models now starting at a much more spacious 32GB.
iPhone 7 32GB | £140 upfront (with DEAL20 code) | 1000 mins | Unlimited texts | 3GB data | £23pm
This had been our very favourite iPhone 7 deal for ages - but then Vodafone came along and trumped it. It's still very good though and a great alternative if you have an aversion to the red network or like the look of O2's Priority rewards. Total cost over 24 months is £692
iPhone 7 32GB | £49.99 upfront | Unlimited calls and texts | 10GB data | £31pm
Here's a decent option if you're an O2 fan that ones more than meagre data on the iPhone 7. £32 per month is manageable, and less than £50 at the start is just fantastic. Shame the data allowance just fell by 5GB a month, mind. Total cost over 24 months is £793.99
iPhone 7 32GB | £1.99 upfront | Unlimited calls and texts | 30GB data | £36pm
O2 has been just horrible on the iPhone 7 of late. But it finally has some better deals to shout about, and is the best value network on the handset right now when it comes to big data deals. £36 per month may feel like a lot to pay for an iPhone approaching its second birthday, but bear in mind all of that lovely data to stream, surf and download with away from the Wi-Fi. And there;s practically nothing to pay upfront, too. Total cost over 24 months is £865.99
Best Samsung Galaxy S8 deals on O2:
There's no doubt that the Samsung Galaxy S8 is a fantastic phone. The lightning fast chip-set and abandonment of a large bezel around the screen makes it the premier Android experience. And now that the S9 is here, it's no longer even that expensive.
Samsung Galaxy S8 | £80 upfront (with DEAL20 code) | 3GB data | 1000 minutes | Unlimited texts | £23pm
It's a close run thing between this S8 deal and the best 4GB offering on Vodafone for our king of the hill. This one is a bit more expensive upfront at the moment, and gets you less data each month as well. But at least you'll be on O2's Priority rewards. Total cost over 24 months is £632
Samsung Galaxy S8 | FREE upfront | 25GB data | Unlimited calls and texts | £37pm
This is an absolutely exceptional S8 deal from Mobile Phones Direct, but just requires a bit of work from your side. That's because there's an epic £252 cashback available, which you get your hands on by claiming it in five instalments over the course of the two year contract. That makes the effective monthly payments £26.50 a go, and there's nothing to pay at all upfront. Total cost over 24 months is £636 (after cashback)
Samsung Galaxy S8 | FREE upfront | 30GB data | Unlimited minutes and texts | £36pm
30GB data deals from O2 on the Galaxy S8 just got great again. Free upfront is a great start, although the high-ish monthly bills are a bit more expensive than we would have liked. Total cost over 24 months is £864
The best iPhone SE deals on O2:
The iPhone SE looks and feels exactly the same as the iPhone 5S. But instead of sporting two-year-old hardware it's been updated, with a faster CPU and graphics, and the 12MP iSight camera straight out of the iPhone 6S. It's a modern iPhone in the shape of an old iPhone, for people who like the old iPhones but want more up-to-date hardware.
iPhone SE 32GB | £29.99 upfront | Unlimited calls and texts | 1GB data | £18pm
O2 has just come good with one of the very cheapest prices you can get right now on the iPhone SE, especially from one of the four biggest UK networks. This is decent on the budget Apple iPhone, with monthly bills of a mere £18 per month. A shame that you now have to pay something when you sign up though. The cost over 24 months is £461.99
iPhone SE 32GB | £29.99 upfront | 1000 minutes | Unlimited texts | 3GB data | £23m
Anything over a meagre amount of data isn't exactly what we'd call cheap on the iPhone SE with O2 at the moment. Go over 3GB of data and things really get out of hand, but this Carphone Warehouse deal isn't too bad. Not sure why they're getting stingy with the call allowance though. The total cost of this deal over 24 months is £581.99
iPhone SE 32GB | FREE upfront | Unlimited minutes | Unlimited texts | 30GB data | £36pm
Well this is something a bit new for the big data iPhone SE scene. It's on O2 and costs £36 per month. OK, so nothing special there. But there's also the opportunity to claim back a remarkable £360 cashback AND a free Google Chromecast. So well worth considering if you have vast data requirements. The total cost of this deal over 24 months is £504 (after cashback)
The best Google Pixel 2 deals on O2:
Google's own flagship handset has proved very popular with people wanting the purist Android experience out there. The Google Pixel 2 is every bit the match for the likes of the Samsung Galaxy S8 and you know that you'll always have the most up-to-date Android operating system. And the cameras can scarcely be matched by any other smartphone today.
Google Pixel 2 | £79.99 upfront | 30GB data | Unlimited mins and texts | £38pm
Raise the data stakes on the Pixel 2 and this 30GB effort is pretty good. The question to ask yourself before you go for it though is: do I really need 30GB of data every month? If not, then get yourself something cheaper as there's plenty more available. This is Carphone Warehouse again in another guise - its budget e2save brand. Total cost over 24 months is £991.99