Compare Three Mobile SIM Only Deals 2025 UK with SwitchSquid
Switch Squid is always here to help you find the best Three SIM-only deals in 2025. Whether you want unbeatable data, flexible contracts, or exclusive rewards, expert comparison with Switch Squid can help you with the switching process, saving, and staying connected. Discover why thousands of people trust SwitchSquid to compare mobile, broadband, and energy deals to always get more for your money.
Why Compare Three SIM Only Deals with SwitchSquid?
If you are looking for unbeatable value, Three is a strong contender for mobile SIMs, offering some of the most competitive SIM-only plans in the UK. Plans can start from around £5 per month for allowances like 3GB data, with unlimited calls and texts often included.
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Flexible Contracts: Choose from 1-month rolling, 12-month, or 24-month contracts to fit your lifestyle and budget.
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Powerful 5G Plans: Get superfast speeds on compatible devices with 5G included at no extra cost on their 5G-ready plans.
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Unlimited Data Plans: Three Mobile is well-known for its unlimited data plans, ideal for streaming, gaming, and browsing without limits – a great option for heavy users.
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Exclusive Rewards: Access "Three+" (Three Plus) rewards, which can include early access to events, discounts, and more.
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SwitchSquid Benefits: Our platform, Switch Squid, aims to deliver exclusive offers, clear comparisons, and expert advice, helping you switch with confidence and save more.
Top Three SIM Only Deals (Examples for 2025)
Prices may vary, are subject to annual increases as per contract terms, and are illustrative. Always check the latest deals.
|
Data Allowance |
Contract Length |
Monthly Price (approx.) |
5G Ready |
Unlimited Calls & Texts |
Rewards/Extras |
|
3GB |
12 months |
£5 |
✔ |
✔ |
Three+ Rewards |
|
40GB |
12 months |
£7 |
✔ |
✔ |
Three+ Rewards |
|
120GB |
12 months |
£12 |
✔ |
✔ |
Three+ Rewards |
|
Unlimited |
24 months |
£20 |
✔ |
✔ |
Go Roam (check terms), Three+ |
Key Features of Three SIM Only Plans
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Generous Data Choices: From light user plans (e.g., 3GB) to truly unlimited data, there's an option for everyone.
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Keep Your Own Phone: If you already own a phone and want to cut monthly costs, a SIM-only deal is an excellent choice.
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Keep Your Current Number: Enjoy a hassle-free switch and keep your existing mobile number.
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Roaming Options: Select plans include "Go Roam," allowing you to use your allowance in specified international destinations (terms and fair usage policies apply). This is ideal for travellers.
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Easy Switching Process: With SwitchSquid's guidance, we aim to make the switching process straightforward, ensuring you get the best deal without stress.
Why Use SwitchSquid for Your Next SIM Only Switch?
SwitchSquid isn’t just a comparison site; it's a place where you can aim to save money across mobile, broadband, and energy. Our expert team tracks the latest deals, negotiates exclusive offers where possible, and provides clear, jargon-free advice for your switch.
With SwitchSquid, you can:
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Compare the latest Three SIM-only deals side-by-side.
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Filter by data, contract length, and monthly price.
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Access exclusive discounts and rewards when available.
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Get expert tips for switching and saving.
Frequently Asked Questions (FAQ)
What are Three SIM only deals?
A Three SIM-only deal is a mobile plan that provides a SIM card with an allowance for data, calls, and texts. It doesn’t include a new handset. This type of deal is often cheaper and more flexible than traditional phone contracts that bundle a phone.
Can I get unlimited data with Three?
Yes, Three is well-known for its unlimited data plans, which are suitable for heavy users who enjoy streaming, remote working, gaming, and extensive browsing.
Is 5G included in all Three SIM only plans?
Most, if not all, new Three SIM-only plans include 5G capability. If you have a 5G-compatible device and are in a 5G coverage area, you can enjoy the benefits of 5G with Three.
Can I keep my current number when switching to Three?
Yes, you can keep your current number. You'll need to request a PAC (Porting Authorisation Code) from your current provider and give it to Three. Switch Squid can help guide you through this process.
Are there credit checks for Three SIM only contracts?
Yes, credit checks generally apply for pay monthly SIM-only plans with Three. If you don’t qualify or prefer not to have a credit check, Pay As You Go options are available.
Ready to find your perfect Three Mobile SIM only deal?
Compare the latest offers and enjoy great data allowances, flexible plans, and exclusive rewards with Three today, with the help of SwitchSquid.