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3 Mobile SIM Only Deals

We have the best Three SIM Only deals to suit all your needs Three the award winning network for 'Best SIM Only Network’, 'Best Network for Data' and 'Best Network for Roaming' at the recent USwitch Awards offer great deals and value on SIM Only plans. Choose from Three SIM Only Essential Plans or Three SIM Only Advanced Plans. All Three SIM Only plans come with all-you-can-eat texts and Three Advanced SIM Only Plans come with all-you-can-eat minutes too, all you need to decide is how much data you’ll need. With the Three Essential SIM Only plans you’ll save some money on your contract but miss out on features such as Feel At Home Around the World and Personal Hotspot allowance, although you’ll still be able to use Feel At Home in Europe.

Three SIM Only FAQs

Which SIM card does my mobile phone use

  1. Choose the manufacturer of your mobile phone
  2. Choose Your mobile phone

Mobile phone outline
Standard Sim Card
Nano Sim Card

Our Best Selling Deal

Three Multi SIM

  • Unlimited texts
  • Unlimited minutes
  • 4Gb data
  • 12 Months contract
  • £13.00 per month
  • Total cost:£156.00
order from:

See this deal

Showing 8 of 8 sim

Multi SIM
12 months contract
4Gb data
Unlimited minutes
Unlimited texts
£13.00 per month
£156.00Total cost:
order from: See this deal

Three Advanced Sim Only Plan

  • 5G Ready at no extra cost
  • Use your data in 71 destinations all over the world.
  • Use your existing data allowance to connect other devices to your phone and get online
Multi SIM
12 months contract
4Gb data
Unlimited minutes
Unlimited texts
£13.00 per month
£156.00Total cost:
order from: See this deal

Three Advanced Sim Only Plan

  • 5G Ready at no extra cost
  • Use your data in 71 destinations all over the world.
  • Use your existing data allowance to connect other devices to your phone and get online
Multi SIM
12 months contract
12Gb data
Unlimited minutes
Unlimited texts
£16.00 per month
£192.00Total cost:
order from: See this deal

Three Advanced Sim Only Plan

  • 5G Ready at no extra cost
  • Use your data in 71 destinations all over the world.
  • Use your existing data allowance to connect other devices to your phone and get online
Multi SIM
12 months contract
12Gb data
Unlimited minutes
Unlimited texts
£16.00 per month
£192.00Total cost:
order from: See this deal

Three Advanced Sim Only Plan

  • 5G Ready at no extra cost
  • Use your data in 71 destinations all over the world.
  • Use your existing data allowance to connect other devices to your phone and get online
Multi SIM
12 months contract
30Gb data
Unlimited minutes
Unlimited texts
£19.00 per month
£228.00Total cost:
order from: See this deal

Three Advanced Sim Only Plan

  • 5G Ready at no extra cost
  • Use your data in 71 destinations all over the world.
  • Use your existing data allowance to connect other devices to your phone and get online
Multi SIM
12 months contract
30Gb data
Unlimited minutes
Unlimited texts
£19.00 per month
£228.00Total cost:
order from: See this deal

Three Advanced Sim Only Plan

  • 5G Ready at no extra cost
  • Use your data in 71 destinations all over the world.
  • Use your existing data allowance to connect other devices to your phone and get online
Multi SIM
12 months contract
Unlimited data
Unlimited minutes
Unlimited texts
£21.00 per month
£252.00Total cost:
order from: See this deal
Multi SIM
12 months contract
Unlimited data
Unlimited minutes
Unlimited texts
£21.00 per month
£252.00Total cost:
order from: See this deal

Three Advanced Unlimited Data Sim Only Plan

  • Unlimited Data
  • 5G Ready at no extra cost
  • Use your data in 71 destinations all over the world.
  • Use your existing data allowance to connect other devices to your phone and get online

Cashback

Guaranteed/Automatic Cashback
Your guaranteed/automatic cashback will be paid by BACS directly into your bank account within a certain number of days after connection. Please check the exact number of days when you purchase your product.

Cashback by Redemption
Cashback by redemption usually means you have to claim the money from the company. They will supply instructions when you purchase your product. You have to be an organised person for this type of offer. But if your are, then there are some GREAT deals to be had.

You usually have to send them a voucher or your mobile phone bill several times over the length of your new contract, to prove your are still connected to the network and paying your bill. An example from MobilePhonesDirect is shown below:

The cashback is claimable by instalments in months 6, 9, 12, 15 and 18 and instructions on how to claim will be provided with your order.

Cashback will become void for customers who disconnect from the network prior to their payment being made.

Three SIM Only FAQs

Yes it will. Whichever size of SIM card your existing phone or tablet takes, a Three Multi SIM card will fit. Just pop out the size you need, either standard, micro or nano, and place it into your tablet or phone.

Yes you can. Just follow the steps below:

Make sure you can switch network: Check with your existing network to make sure there are no cancellation charges if you switch to Three. These cancellation charges will usually apply if you are still within the contract time length of your current contract.

Choose your new Three SIM Only deal: Keeping your existing mobile phone and taking out a Three SIM Only contract is a great way of saving money, in some cases it could half your current monthly cost. We have lots of Three SIM Only deals for you to choose from.

Get a Porting Authorisation Code (PAC code): Once you have decided to leave your exisitng network and choosen your new Three SIM Only deal, you need to call your existing network and ask them for a PAC Code. If you phone your existing network up, Ofcom have insisted that they have to give you your PAC Code immedialety. At this stage your network may try to tempt you to stay with them, offering you a better deal.

Give your PAC code to your new network: If your existing network has been unable to tempt you to stay with them, call up Three and give them the PAC Code you got from your exisitng network, once you have given Three your PAC Code, it usually take 24 hours for your mobile phone number to be switched.

4G comes as standard on all Three purchases at no extra cost. Three's network has recently won a whole host of awards: 'Best Network for Data', 'Best Pay Monthly Network', 'Best SIM Only Network', 'Online Retailer of the Year', 'Pay Monthly Retailer of the Year' and 'Best Network for Roaming' in the USwitch 2017 Awards. 80% off Three's customers said they were satisfied with their reception.

WiFi calling lets you use the call and text on your phone over WiFi instead of regular mobile phone signal. Three’s WiFi calling scheme is called Three inTouch and has been rated it as the best out of any network.

The Three Advanced SIM Only Plan allows you to ‘Go Binge’ this provides an unlimited data allowance for streaming video and music from selected partners as long as you’ve some of your standard data allowance remaining in any billing cycle.

Check Three's signal strength in your area with the ofcom network checker.