SIM Cards on O2

O2 SIM Only

With over 23 million customers and 450 High Street stores O2 is one of the biggest mobile network operators in the UK. O2's pay monthly customers get free access to a host of O2 Perks including O2 Priority for exclusive discounts and freebies and the chance to buy tickets for major events up to 48 hours before general release. You can also jump the queues at selected O2 venues and treat your friends to the VIP experience with access to exclusive O2 bars.

Jump straight to comparing O2 deals

Why you might like O2

Great coverage

O2 has an excellent 4G network covering most of the UK population as well as WiFi hotspots available at thousands of locations, including at over 100 stations on the London Underground, for anyone with the free O2 WiFi app. 

O2 Perks

O2 has a host of perks available to their customers including O2 Priority for exclusive discounts, freebies and tickets to major sports and entertainment events available to O2 customers up to 48 hours before general release. At selected O2 venues you can jump the queues and treat your friends to the VIP experience with exclusive bars. 

Evernote Premium free for one year

O2 customers get a 12 month free trial of Evernote Premium O2 Pay Monthly customers can claim a free 12 month subscription to Evernote Premium so you can keep all of your ideas, pictures and important files with you wherever you are.

Easy to access customer service

O2 are well placed on on most High Streets with 450 shops across the UK so if you do need to speak to someone in person you can just pop in store. Alternatively O2’s UK based customer support team are just a phone call away or if you're familiar with navigating website, O2 have a helpful online community forum and help pages available via their website. 

Charge to mobile

Essentially O2's answer to PayPal, you're guaranteed peace of mind with O2's free to use Charge To Mobile service, offering a fast, safe and easy way to buy apps, games, films and more with your mobile.

Why you might not like O2

No 3G plans

O2's 4G plans are rolling out to an additional one million customers each month

O2 is a 4G only network so, if you're still waiting for the rollout to meet you, you'll be paying for a service you can't yet use. You will, of course, be able to access O2's 3G network so coverage won't be an issue. If you want to save some money, choose one of the smaller MVNOs such as giffgaff, O2's sister network. Giffgaff have a range of flexible 30-day 3G SIMs starting from £5 a month.

They're not the cheapest

O2 SIM-only deals may not be the cheapest compared to other networks but they do have some great plans starting from as little as £8 per month and offer a host of perks, plus their network coverage and customer service is pretty good too. O2, like EE, has confirmed that contract prices will increase each year in line with the Retail Price Index, 3.2% in 2013, so factor that into the price when choosing your plan. If you want a network with a fixed price promise then take a look at Vodafone, Three, Tesco Mobile, giffgaff, The People’s Operator or Virgin Mobile.

 

Our top SIM Only Deals

O2 SIM Only 4G
Unlimited mins
Unlimited texts
2GB internet
4GInternet
£18.00 per month
(over 12 months)
Tip: You can filter by SIM Type or device model by using the options on the left, but you don't have to. We can deal with that later.
Plan Type Contract Minutes Texts Internet Extras Monthlysort descending
O2 SIM Only 4G O2 SIM Only
12 months
100 Unlimited 100MB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
£8.50 Buy / Choose SIM
O2 4G Mobile Broadband O2 SIM Only
12 months
100 500MB
4GInternet
£8.50 Buy / Choose SIM
O2 4G Mobile Broadband O2 SIM Only
1 month
100 500MB
4GInternet
£8.50 Buy / Choose SIM
O2 SIM Only 4G O2 SIM Only
1 month
100 Unlimited 100MB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
£9.50 Buy / Choose SIM
O2 SIM Only 4G O2 SIM Only
12 months
300 Unlimited 300MB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
£10.50 Buy / Choose SIM
O2 4G Mobile Broadband O2 SIM Only
12 months
100 1GB
4GInternet
£10.50 Buy / Choose SIM
O2 4G Mobile Broadband O2 SIM Only
1 month
100 1GB
4GInternet
£11.00 Buy / Choose SIM
O2 SIM Only 4G O2 SIM Only
1 month
300 Unlimited 300MB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
£12.50 Buy / Choose SIM
O2 SIM Only 4G O2 SIM Only
12 months
500 Unlimited 500MB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
£13.50 Buy / Choose SIM
O2 SIM Only 4G O2 SIM Only
1 month
500 Unlimited 500MB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
  • Evernote Premium for a year
£15.50 Buy / Choose SIM
O2 4G Mobile Broadband O2 SIM Only
12 months
100 3GB
4GInternet
£15.50 Buy / Choose SIM
O2 SIM Only 4G O2 SIM Only
12 months
1,000 Unlimited 1GB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
£16.00 Buy / Choose SIM
O2 4G Mobile Broadband O2 SIM Only
1 month
100 3GB
4GInternet
£16.00 Buy / Choose SIM
O2 SIM Only 4G O2 SIM Only
12 months
Unlimited Unlimited 2GB
4GInternet
£18.00 Buy / Choose SIM
O2 4G Mobile Broadband O2 SIM Only
12 months
100 5GB
4GInternet
£21.00 Buy / Choose SIM
O2 SIM Only 4G O2 SIM Only
1 month
Unlimited Unlimited 1GB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
  • Evernote Premium for a year
£22.00 Buy / Choose SIM
O2 4G Mobile Broadband O2 SIM Only
1 month
100 5GB
4GInternet
£22.00 Buy / Choose SIM
O2 SIM Only 4G O2 SIM Only
12 months
Unlimited Unlimited 4GB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
£22.00 Buy / Choose SIM Offer: New tariff. Introductory offers ends 13 May 2015.
O2 SIM Only 4G O2 SIM Only
1 month
Unlimited Unlimited 2GB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
  • Evernote Premium for a year
£23.00 Buy / Choose SIM
O2 SIM Only 4G O2 SIM Only
12 months
Unlimited Unlimited 7GB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
£25.00 Buy / Choose SIM Offer: New tariff. Introductory offers ends 13 May 2015.
Not sure? Don't know what kind of SIM card you need (or your device model isn't in the list)? Click here for help.
Contract SIM Type Minutes Texts Internet Extras Monthlysort descending Buy Now
O2 SIM Only
12 months
Micro SIM for phones
Micro SIM
100 Unlimited 100MB
4GInternet
  • BlackBerry Services
  • Tethering
  • Free WiFi on the London Underground
£8.50
O2
Buy NowMore Info...
O2 SIM Only
12 months
Micro SIM for phones
Micro SIM
100 Unlimited 100MB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
£8.50
O2
Buy NowMore Info...
O2 SIM Only
12 months
Micro SIM for phones
Micro SIM
100 Unlimited 100MB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
£8.50
O2
Buy NowMore Info...
O2 SIM Only
12 months
Nano SIM for phones
Nano SIM
100 Unlimited 100MB
4GInternet
  • BlackBerry Services
  • Tethering
  • Free WiFi on the London Underground
£8.50
O2
Buy NowMore Info...
O2 SIM Only
12 months
Nano SIM for phones
Nano SIM
100 Unlimited 100MB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
£8.50
O2
Buy NowMore Info...
O2 SIM Only
12 months
Standard SIM / Mini SIM for phones
Standard SIM
100 Unlimited 100MB
4GInternet
  • BlackBerry Services
  • Tethering
  • Free WiFi on the London Underground
£8.50
O2
Buy NowMore Info...
O2 SIM Only
12 months
Standard SIM / Mini SIM for phones
Standard SIM
100 Unlimited 100MB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
£8.50
O2
Buy NowMore Info...
O2 SIM Only
12 months
Standard SIM / Mini SIM for phones
Standard SIM
100 Unlimited 100MB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
£8.50
O2
Buy NowMore Info...
O2 SIM Only
12 months
Micro SIM for phones
Micro SIM
100 500MB
4GInternet
£8.50
O2
Buy NowMore Info...
O2 SIM Only
12 months
Nano SIM for phones
Nano SIM
100 500MB
4GInternet
£8.50
O2
Buy NowMore Info...
O2 SIM Only
12 months
Standard SIM / Mini SIM for phones
Standard SIM
100 500MB
4GInternet
£8.50
O2
Buy NowMore Info...
O2 SIM Only
1 month
Nano SIM for phones
Nano SIM
100 500MB
4GInternet
£8.50
O2
Buy NowMore Info...
O2 SIM Only
1 month
Micro SIM for phones
Micro SIM
100 500MB
4GInternet
£8.50
O2
Buy NowMore Info...
O2 SIM Only
1 month
Standard SIM / Mini SIM for phones
Standard SIM
100 500MB
4GInternet
£8.50
O2
Buy NowMore Info...
O2 SIM Only
1 month
Micro SIM for phones
Micro SIM
100 Unlimited 100MB
4GInternet
  • BlackBerry Services
  • Tethering
  • Free WiFi on the London Underground
£9.50
O2
Buy NowMore Info...
O2 SIM Only
1 month
Micro SIM for phones
Micro SIM
100 Unlimited 100MB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
£9.50
O2
Buy NowMore Info...
O2 SIM Only
1 month
Nano SIM for phones
Nano SIM
100 Unlimited 100MB
4GInternet
  • BlackBerry Services
  • Tethering
  • Free WiFi on the London Underground
£9.50
O2
Buy NowMore Info...
O2 SIM Only
1 month
Nano SIM for phones
Nano SIM
100 Unlimited 100MB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
£9.50
O2
Buy NowMore Info...
O2 SIM Only
1 month
Standard SIM / Mini SIM for phones
Standard SIM
100 Unlimited 100MB
4GInternet
  • BlackBerry Services
  • Tethering
  • Free WiFi on the London Underground
£9.50
O2
Buy NowMore Info...
O2 SIM Only
1 month
Standard SIM / Mini SIM for phones
Standard SIM
100 Unlimited 100MB
4GInternet
  • Tethering
  • Free WiFi on the London Underground
£9.50
O2
Buy NowMore Info...

O2 sim-only contracts

4G coverage on O2 Pay Monthly SIM Only: An excellent coverage guarantee and bags of allowance make O2 great for 4G on the go. Don't worry if 4G isn't near you yet, you won't have long to wait, because O2 are rolling out their 4G service to an additional one million people each month.

Charge To Mobile: Essentially O2's answer to Paypal, you're guaranteed peace of mind with O2's free to use Charge To Mobile service, offering a fast, safe and easy way to buy apps, games, films and more with your mobile.

"Out of bundle" call charges on O2

"Out of bundle" call charges only apply once you've used up all of your monthly allowance, or where you don't have any given allowance included (for instance if you don't have internet/data built into your plan's package). All prices are in pence.

Plan Minutes (Cross-Network) Minutes (Same-Network) MMS (Cross-Network) MMS (Same-Network) Texts (Cross-Network) Texts (Same-Network) Landline Minutes Data (per MB) Voicemail Minutes
O2 SIM Only 45 45 40 40 15 15 45 3 35 Details...