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3 Mobile SIM Only Deals

Our Three SIM Only Deals start from just £8.00 per month. All Three's SIM Only Plans are 5G Ready at no extra cost, they also include unlimited minutes and texts and Three's Unlimited data plans gives you all the data you could ever need, with no limits or caps.

Showing 1 to 7 of 7 mobile phone deals

Multi SIM
Multi SIM image
12 months contract
30Gb data
Unlimited minutes
Unlimited texts
£20.00 per month
£240.00 total cost
order from: See this deal

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

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

Show more

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
Multi SIM image
12 months contract
30Gb data
Unlimited minutes
Unlimited texts
£20.00 per month
£240.00 total cost
order from: See this deal

Show more

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
Multi SIM image
12 months contract
12Gb data
Unlimited minutes
Unlimited texts
£10.00 per month £8.00 per month after cash back
£120.00 total cost £96.00 total cost after cash back
order from: See this deal

+ £24.00 Cashback paid automatically

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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
Multi SIM image
12 months contract
Unlimited data
Unlimited minutes
Unlimited texts
£18.00 per month £14.50 per month after cash back
£216.00 total cost £174.00 total cost after cash back
order from: See this deal

+ £42.00 Cashback paid automatically

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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
Multi SIM
Multi SIM image
12 months contract
8Gb data
Unlimited minutes
Unlimited texts
£8.00 per month £7.00 per month after cash back
£96.00 total cost £84.00 total cost after cash back
order from: See this deal

+ £12.00 Cashback paid automatically

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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

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.

What are the benefits of a Three SIM 0nly deal?

Sky Mobile is a Mobile Virtual Network Operators (MVNO). MVNOs are companies that use another company's network. SKy Mobile uses the O2 network, so there's excellent 4G coverage and access to O2's rollout of 5G

Award Winning Network

  • Over 98% coverage on the O2 network, with 4G as standard.
  • Free calls to UK call centres.
  • Manage your Sky TV, Broadband & Mobile with the My Sky app.
  • Use Visual Voicemail and Voice over Wi-Fi on selected phones.
  • Best Value Pay Monthly, Best Network for Customer Service & Best Pay Monthly Network at the uSwitch Mobile awards in February 2019

What type of contract SIM only deals do Sky Mobile have?

EE currently offer 12 month contract SIM only plans. All plans come with unlimited calls and unlimited texts, the amount of data ranges from 1GB - 25GB.

  • 1GB Data - Good for occasional browsing and social media updates.
  • 3GB Data - Great for online updates and music streaming.
  • 10GB Data - Download albums, stream movies, play games and much more.
  • 15GB Data - Download albums, stream movies, play games and much more.
  • 25GB Data - Great for browsing, streaming, watching and more.

Data Share

Share your unused data with family & friends on the same account on up to 7 SIMS.

Cash In You Data

Cash in your unused data for a range of rewards like accessories or money off a new phone.

Unlimited Streaming

Daydreaming on the train. Waiting for an appointment. Life’s full of little moments of downtime. Unless you’re with Sky Mobile.

Sky TV customers with Sky Mobile can Watch Sky TV and use all Sky Apps on the go, without using data

Free roaming in the EU

All Sky Mobile customers can use their allowances across the EU, without any additional charges, the EU countries are:

Austria, Azores (Portugal), Belgium, Bulgaria, Canary Islands, Croatia, Cyprus (excluding Northern Cyprus), Czech Republic, Denmark, Estonia, Finland, France*, Germany, Gibraltar, Greece, Hungary, Iceland, Ireland (Republic of), Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Madeira (Portugal), Malta, Netherlands** Norway, Poland, Portugal, Reunion, Romania, Slovakia, Slovenia, Spain, Sweden.

*Includes French Territories in the Indian Ocean: Mayotte, Reunion and French West Indies: French Guiana, Guadeloupe, Martinique, St Barthelemy, St Martin.

**Includes Netherlands Antilles: Sint Maarten, Saba, Sint Eustatius, Aruba, Bonaire, Curacao.

More Generic SIM Only FAQS

For more generic SIM only FAQs, such as, can I keep my number? Please visit our SIM only faqs

Which SIM card does my phone use

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

Mobile phone outline
Standard Sim Card
Nano Sim Card