Three Mobile SIM Deal
£13.50 a month
No contract
100 GBof 5G data
A pay as you go (PAYG) SIM card is ideal if you don’t want to sign up for a long-term contract, or you’re not keen on going through a credit check. Compare over 40 deals and across 5 trusted UK networks. Over 300,000 customers trust us to help find their SIM deal.
Uswitch tips
1. Choose your new deal
Select a deal below and click through to the network’s site.
2. Get your PAC code
You’ll need a special code to keep your number when you switch. It's quick and free:
Text PAC to 65075 to receive your code.
3. Give the code to your new network
Contact the new network after signing up to provide them with your PAC code, which will begin the process and will automatically cancel your previous plan. Alternatively, you can enter the PAC code when signing up on the network’s site.
£13.50 a month
No contract
100 GBof 5G data
Uses O2's Network
£10.00 a month
No contract
20 GBof 5G data
Uses Three Mobile's Network
£12.50 a monthfor 2 months, then £25.00
No contract
Unlimited5G data
Uses Vodafone's Network
£10.00 a month
No contract
45 GBof 5G data
Uses O2's Network
£6.00 a month
No contract
2 GBof 5G data
£10.00 a month
No contract
15 GBof 5G data
Uses O2's Network
£20.00 a month
No contract
100 GBof 5G data
Uses O2's Network
£8.00 a month
No contract
5 GBof 5G data
Uses O2's Network
£12.00 a month
No contract
26 GBof 5G data
£31.50 a month
No contract
Unlimited5G data
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Please note: Mobile networks may increase monthly prices in line with the retail or consumer price index each year during the length of your contract. Please refer to individual network's terms and conditions before signing up.
Author: Ray Ali | Last updated: 28 August 2024
Pay as you go (PAYG) SIM cards are an easy way to use your phone without needing a long-term contract or lengthy payment plans.
You simply pre-pay a set amount of money, which gives you a set number of call minutes, data, and texts. When you run out, you just top up again with an amount of your choice.
Pay as you go SIM only deals often come with a free SIM card, too. So all you need is a mobile phone you’re happy to use.
No, you generally won’t incur additional charges when you sign up for a pay as you go SIM only deal. Since you pre-pay the amount you’re willing to spend, it’s just a case of using your phone until your money runs out. Then, you’ll have to top up again to get more calls, texts, and data.
Keep your current phone number, swap phones whenever you want
Pay what you want when you want
Avoid being tied down to a long-term contract.
No credit check
You can top up from as little as £5 per spend
You may not get the best rates for data, calls or texts
PAYG deals will work out as more expensive than a traditional pay monthly package
You will need to have a phone that’s unlocked
Almost all UK networks will offer pay-as-you-go SIM cards as part of their product offering. Major UK mobile networks such as Three Mobile, O2, giffgaff and VOXI offer pay-as-you-go deals, and the price varies depending on how much data you need.
The best pay-as-you-go deal for you depends on your personal needs and requirements. Your best bet is to compare options across all networks until you find the ideal balance of allowance and cost.
Yes, you can often use a pay-as-you-go SIM card overseas. However, you will need to check your network's roaming policy first. You will likely have to pay more than you would if you used the phone at home, too.
Check out our network-by-network roaming guide for more info.
If you're with giffgaff and you're travelling abroad, find out about any roaming charges or packages you could select with the network.
Learn moreNetwork raised the price of your phone or SIM only contract? Here's a guide to your consumer rights and what you can do to cut your costs.
Learn moreWant to unlock your mobile phone? We take you through the benefits, the risks and most importantly - how to do it with minimal hassle.
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