MoneySavingExpert Founder, Martin Lewis · Editor-in-Chief, Marcus Herbert Chair, Martin Lewis · Editor, Marcus Herbert

Cheap Three Sim Only Deals

Here are the cheapest Three Sim deals.

Keep my current signal
Sim card
Sim switching need-to-knows...
Text 'INFO' free to 85075 to check if you're one of the 14m who are out-of-contract
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Some deals increase in price during the contract - we flag that below if it does
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Your top deals

 
5G data 8GB
Mins/texts Unlimited
Contract 12mth
Roaming No
£14 Automatic cashback
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£7/mth
After 1 Apr 26 price rise
£8.90/mth
Automatic cashback
£14
Equiv cost: Equivalent cost incl cashback: 
£7.26/mth
 
5G data 12GB
Mins/texts Unlimited
Contract 12mth
Roaming No
£37 Automatic cashback
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£9/mth
After 1 Apr 26 price rise
£10.90/mth
Automatic cashback
£37
Equiv cost: Equivalent cost incl cashback: 
£7.35/mth
 
5G data 15GB
Mins/texts Unlimited
Contract 12mth
Roaming No
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£7/mth
After 1 Apr 26 price rise
£8.90/mth
Equiv cost: Equivalent cost: 
£8.43/mth
 
5G data 30GB
Mins/texts Unlimited
Contract 12mth
Roaming No
£26 Automatic cashback
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£10/mth
After 1 Apr 26 price rise
£11.90/mth
Automatic cashback
£26
Equiv cost: Equivalent cost incl cashback: 
£9.26/mth
 
5G data 30GB
Mins/texts Unlimited
Contract 12mth
Roaming No
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£8/mth
After 1 Apr 26 price rise
£9.90/mth
Equiv cost: Equivalent cost: 
£9.43/mth
 
5G data 60GB
Mins/texts Unlimited
Contract PAYG
Roaming No
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Monthly cost
£10/mth
 
5G data 60GB
Mins/texts Unlimited
Contract 12mth
Roaming No
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£9/mth
After 1 Apr 26 price rise
£10.90/mth
Equiv cost: Equivalent cost: 
£10.43/mth
 
5G data 100GB
Mins/texts Unlimited
Contract 12mth
Roaming No
£75 Automatic cashback
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£15/mth
After 1 Apr 26 price rise
£17.30/mth
Automatic cashback
£75
Equiv cost: Equivalent cost incl cashback: 
£10.48/mth
 
5G data 80GB
Mins/texts Unlimited
Contract 12mth
Roaming No
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£10/mth
After 1 Apr 26 price rise
£11.90/mth
Equiv cost: Equivalent cost: 
£11.43/mth
 
5G data UnltdUnltd
Mins/texts Unlimited
Contract 12mth
Roaming No
£67 Automatic cashback
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£17/mth
After 1 Apr 26 price rise
£19.30/mth
Automatic cashback
£67
Equiv cost: Equivalent cost incl cashback: 
£13.15/mth
 
5G data 120GB
Mins/texts Unlimited
Contract PAYG
Roaming No
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Monthly cost
£13.50/mth
 
5G data 120GB
Mins/texts Unlimited
Contract 12mth
Roaming No
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£12/mth
After 1 Apr 26 price rise
£14.30/mth
Equiv cost: Equivalent cost: 
£13.73/mth
 
5G data 25GB
Mins/texts Unlimited
Contract 24mth
Roaming No
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£7/mth
After 1 Apr 26 price rise
£8.90/mth
Until 31 Mar 27
£15.90/mth
After 1 Apr 27 price rise
£17.80/mth
Equiv cost: Equivalent cost: 
£14.63/mth
 
5G data 250GB
Mins/texts Unlimited
Contract 12mth
Roaming No
£35 Automatic cashback
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£16/mth
After 1 Apr 26 price rise
£18.30/mth
Automatic cashback
£35
Equiv cost: Equivalent cost incl cashback: 
£14.81/mth
Available from 2 retailers
 
5G data 120GB
Mins/texts Unlimited
Contract 24mth
Roaming No
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£12/mth
After 1 Apr 26 price rise
£14.30/mth
After 1 Apr 27 price rise
£16.60/mth
Equiv cost: Equivalent cost: 
£14.88/mth
 
5G data 120GB
Mins/texts Unlimited
Contract 24mth
Roaming No
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£8/mth
After 1 Apr 26 price rise
£10.30/mth
Until 31 Mar 27
£18.30/mth
After 1 Apr 27 price rise
£20.60/mth
Equiv cost: Equivalent cost: 
£16.88/mth
 
5G data 240GB
Mins/texts Unlimited
Contract PAYG
Roaming No
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Monthly cost
£18/mth
 
5G data 12GB
Mins/texts Unlimited
Contract 24mth
Roaming No
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£17/mth
After 1 Apr 26 price rise
£18.90/mth
After 1 Apr 27 price rise
£20.80/mth
Equiv cost: Equivalent cost: 
£19.38/mth
 
5G data 12GB
Mins/texts Unlimited
Contract 12mth
Roaming No
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Until 31 Mar 26
£19/mth
After 1 Apr 26 price rise
£20.90/mth
Equiv cost: Equivalent cost: 
£20.43/mth
 
5G data 12GB
Mins/texts Unlimited
Contract 1mth
Roaming No
Unltd minutes and texts
Signal level Uses Three's network
Three
Customer service
Monthly cost
£22/mth
Available from 2 retailers
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Is Three a good network?

Three is one of the four main networks in the UK. In our most recent customer service poll, Three scored 2.3/5 based on 1192 votes.

Does Three offer Sim plans for bad credit?

Three offers a basic PAYG Sim which doesn't require a credit check. It's 'traditional' PAYG (where a customer tops up using credit and uses that for calls, texts and data) and costs 35p/minute, 15p/text and 5p/MB data.

The cheapest Three Sim

The cheapest Three Sim costs £5.17/month and it currently offers unlimited minutes & texts and 1GB/month data over a 24-month contract. See cheap Three Sims.

Can I keep my mobile number if I switch to a Three Sim-only deal?

Yes, you can keep your old mobile phone number. If you're moving from another network, you'll need to text 'PAC' for free to 65075 to request your PAC (porting authorisation code). You will need to provide this to Three which should move your number over within one working day.

If you are already a Three customer, you'll need to fill in a 'keep my number' form on its website.

Can I use my Three Sim abroad?

Anyone joining Three after 1 October 2021 will pay £2/day to use their allowance within the EU. If you're travelling further afield, it's £5/day.

However, newbies to Three's PAYG Sim won't face these roaming charges, but you'll have to swap out your Sim before traveling, plus you'll have a different phone number. To do this, you can either top-up and pay its standard rates of 35p/min, 15p/text and 10p/Mb, or if you plan to use your phone a lot while abroad, it might be worth getting a bundle. It's £2/day for contracts (3-day pass for £5, 7-day pass for £12, 14-day pass for £24). Alternatively, buy a Data Passport for £5 for unlimited data in 89 countries. For more info, see Cheap Roaming.

Can I get 5G enabled Three Sims?

Yes, Three offers 5G on all of its Sims. However, be aware you'll need a 5G-compatible phone too.