Pay Monthly SIM Only Deals

Pay Monthly SIM Only Deals

Need a SIM for your existing phone?

  • Keep your existing number
  • Shorter contract lengths
  • Save money


  • Deals
  • Overview
  • Why SIM Only?

Showing Standard SIM (Change SIM Type)
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Trio SIM (Standard, Micro and Nano combined)
SIM card Free
500MB data
200 minutes
Unlimited
texts
12 monthcontract
£5.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
4GB data
Unlimited minutes
Unlimited
texts
12 monthcontract
£9.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
8GB data
600 minutes
Unlimited
texts
12 monthcontract
£12.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
12GB data
600 minutes
Unlimited
texts
12 monthcontract
£15.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
30GB data
600 minutes
Unlimited
texts
12 monthcontract
£20.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
500MB data
200 minutes
Unlimited
texts
12 monthcontract
£7.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
500MB data
200 minutes
Unlimited
texts
12 monthcontract
£7.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
1GB data
600 minutes
Unlimited
texts
12 monthcontract
£9.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
1GB data
600 minutes
Unlimited
texts
12 monthcontract
£10.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
500MB data
200 minutes
Unlimited
texts
1 monthcontract
£10.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
2GB data
200 minutes
Unlimited
texts
12 monthcontract
£11.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
4GB data
Unlimited minutes
Unlimited
texts
12 monthcontract
£12.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
500MB data
200 minutes
Unlimited
texts
1 monthcontract
£12.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
1GB data
600 minutes
Unlimited
texts
1 monthcontract
£12.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
2GB data
200 minutes
Unlimited
texts
12 monthcontract
£13.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
1GB data
600 minutes
Unlimited
texts
1 monthcontract
£13.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
2GB data
200 minutes
Unlimited
texts
1 monthcontract
£13.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
4GB data
600 minutes
Unlimited
texts
12 monthcontract
£15.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
1GB data
Unlimited minutes
Unlimited
texts
12 monthcontract
£15.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
2GB data
200 minutes
Unlimited
texts
1 monthcontract
£16.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
4GB data
600 minutes
Unlimited
texts
1 monthcontract
£18.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
1GB data
Unlimited minutes
Unlimited
texts
1 monthcontract
£18.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
12GB data
200 minutes
Unlimited
texts
12 monthcontract
£19.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
4GB data
Unlimited minutes
Unlimited
texts
1 monthcontract
£20.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
8GB data
Unlimited minutes
Unlimited
texts
12 monthcontract
£20.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
8GB data
600 minutes
Unlimited
texts
1 monthcontract
£21.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
12GB data
200 minutes
Unlimited
texts
1 monthcontract
£22.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
30GB data
200 minutes
Unlimited
texts
12 monthcontract
£22.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
4GB data
Unlimited minutes
Unlimited
texts
1 monthcontract
£23.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
8GB data
Unlimited minutes
Unlimited
texts
12 monthcontract
£23.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
8GB data
Unlimited minutes
Unlimited
texts
1 monthcontract
£23.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
12GB data
600 minutes
Unlimited
texts
1 monthcontract
£24.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
Unlimited data
200 minutes
Unlimited
texts
12 monthcontract
£24.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
30GB data
200 minutes
Unlimited
texts
1 monthcontract
£25.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
8GB data
Unlimited minutes
Unlimited
texts
1 monthcontract
£26.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
12GB data
Unlimited minutes
Unlimited
texts
12 monthcontract
£26.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
30GB data
Unlimited minutes
Unlimited
texts
12 monthcontract
£26.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
Unlimited data
200 minutes
Unlimited
texts
1 monthcontract
£27.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
Unlimited data
600 minutes
Unlimited
texts
12 monthcontract
£27.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
12GB data
Unlimited minutes
Unlimited
texts
1 monthcontract
£29.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
30GB data
600 minutes
Unlimited
texts
1 monthcontract
£29.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
Unlimited data
600 minutes
Unlimited
texts
1 monthcontract
£30.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
Unlimited data
Unlimited minutes
Unlimited
texts
12 monthcontract
£32.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
30GB data
Unlimited minutes
Unlimited
texts
1 monthcontract
£33.00 a month
Trio SIM (Standard, Micro and Nano combined)
SIM card Free
Unlimited data
Unlimited minutes
Unlimited
texts
1 monthcontract
£35.00 a month

Overview

Switch to a Pay Monthly SIM Only plan and save money on your bill and get more flexibility with 1 month and 12 month contracts on Three.

Simply pop the delivered SIM card into your phone and you are good to go.

Have an existing number you want to keep? No problem follow the 3 simple steps here and Three will ensure your number is brought across when you switch.

Which type of SIM Card do I need for my phone?

The type of SIM card you need depends on the device you want to use with your SIM card. If in any doubt you can always call Three for help free on 0800 358 9048.

  • Standard SIM - For use in the majority of older phones
  • Micro SIM - For use in many newer smartphones including iPhone 4 and iPhone 4S.
  • Nano-SIM - For use some of the latest smartphones including the iPhone 6S, Samsung Galaxy S7, HTC 10 and LG G5.

Looking for a Pay As You Go SIM for your phone?

Why Choose SIM Only?

Why Choose a Pay Monthly SIM Only deal?

There are a host of reasons to choose a SIM Only plan with the main ones being:

  • Save money on your bill

SIM Only plans offer you even better value because the operators don't have to offset the cost of a mobile phone enabling you to get more minutes, data and texts for less which is great news for those who are happy with their existing phone or tablet.

  • More flexibility with shorter contract lengths

SIM Only contracts come with shorter contract lengths than standard mobile 24 month contracts. SIM Only plans are available on 12 month or 1 month rolling contracts.

  • Keep your number

You can quickly and easily bring over your existing number to Three SIM Only.

Why Choose Three?

All 3 SIM Only plans on Three come with

  • Free roaming abroad with Feel At Home
  • 4G at no extra cost
  • Free 0800 calls
  • Unlimited texts
  • Tethering included

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SIM OFFER! 4GB data, Unlimited mins just £9 a month (Was £17) See Deals