Question 1

Is Three a good network for SIM only?

Accepted Answer

Yes, Three is particularly strong for data-heavy users. The network offers the largest unlimited data range of any UK operator, no speed throttling on unlimited plans, free EU roaming via Go Roam in 70+ destinations, and competitive pricing. 5G coverage is growing rapidly through the 2025 merger with Vodafone.

Question 2

Can I get Three SIM only without a long contract?

Accepted Answer

Yes. Three offers 30-day rolling SIM only plans, cancel or change at any point. 12-month contracts are also available at a lower monthly price. Three's 30-day plans are popular for their flexibility and no-credit-check option on some tariffs.

Question 3

Does Three SIM only include 5G?

Accepted Answer

Yes. Three includes 5G access at no extra charge on most SIM only plans, providing you have a 5G-compatible handset and are in a Three 5G coverage area. Three has been consistently ranked as one of the top 5G networks in the UK.

Question 4

How much does a Three SIM only deal cost?

Accepted Answer

Three SIM only plans start from around £8–£10/month for 5–10GB. Unlimited data plans are available from around £15–£20/month. Three frequently offers promotions, prices through Switch may be lower than going direct.

Question 5

Can I keep my number when switching to Three?

Accepted Answer

Yes. Text PAC to 65075 on your current network, you receive your code within 1 minute. Enter it when signing up to Three. Your number transfers within one working day. You can submit the PAC code up to 30 days after receiving it.

Question 6

Does Three throttle unlimited data?

Accepted Answer

No. Three does not throttle data speeds on its unlimited plans, unlike some networks that slow speeds after a certain threshold. You get full network speeds throughout the month. Go Binge (data-free streaming on Netflix, Disney+, Apple TV+, and more) is also included on selected plans.

Question 7

What networks use Three's infrastructure?

Accepted Answer

iD Mobile runs directly on Three's 4G and 5G network. Following the Three and Vodafone network merger in 2025, there is increasing overlap between the two networks' coverage. Other MVNOs using Three include Smarty and some smaller providers.

Question 8

Can I get a Three SIM only deal without a credit check?

Accepted Answer

Three's 30-day rolling plans typically don't require a hard credit check. 12-month contracts may require a soft credit assessment. If you have poor credit, check Three's 30-day plans or consider iD Mobile (on Three's network) which is more flexible.

Three SIM-only deals

List of SIM-only deals

FAQs

Is Three a good network for SIM only?

Can I get Three SIM only without a long contract?

Does Three SIM only include 5G?

How much does a Three SIM only deal cost?

Can I keep my number when switching to Three?

Does Three throttle unlimited data?

What networks use Three's infrastructure?

Can I get a Three SIM only deal without a credit check?

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