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Low cost 1-month SIM deals with lots of data.


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Why SMARTY is the network for you.

Reasons to love SMARTY

Simple, honest mobile.

We are on a mission to make mobile simple and honest. With our flexible plans, we're putting trust back into the industry.

Refer a friend

Friends make it free.

Get a free month on the SMARTY network for every friend you refer. Refer 12 friends and, you guessed it, that's an entire year free for you.

Group plans

Fun for all the family.

Group plans means you can manage up to 8 SMARTY SIMs all in one place. Plus you can save 10% on every SIM in your group.

Powered by Three

You're in safe hands.

SMARTY is powered by Three's strong and reliable network. It covers 97% of the population, with fast speeds for browsing, gaming and downloading.


Recommended by Which.

SMARTY has been recognised as a Which? Recommended Provider for Mobile Network April 2022, now two years in a row!

Step by step

Getting started is easy.

Never had a SMARTY SIM before? No sweat. Activating is easy - get started at smarty.co.uk/activate once it arrives.

Find the perfect SIM Only deal for you


All pay monthly offers subject to security and credit check. Charges will apply for paper billing. Charges may also apply for non-Direct Debit payment. Promo codes cannot be used in conjunction with any other offer. Full Legals.


Each year, your Pay Monthly airtime tariff will be adjusted according to a Fixed Annual Price Change (Three), RPI+ (O2) or Consumer Price Index (Vodafone) rate of inflation. Your bill will be adjusted in April by 4.5% (Three), or the rate announced in January (Vodafone) and February (O2) that year (plus 3.9% on O2, Vodafone).


All products bought on our website are provided by ourselves, not the network, and are subject to our full T&Cs.


Unless otherwise stated, cashback incentives are provided by ourselves and not the Network provider or third-party. Full details are in our T&Cs.

Data Speeds

Advertised 4G and 5G speeds are available in selected areas. Exact speed depends on location and number of users. Check coverage using the link in the shopping basket before buying.