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Compare SMARTY Mobile & SIM only deals, upgrades, coverage, speeds, perks and more

  • Money off your bill for unused data
  • Simple, keenly priced plans and no long contracts
  • UK-wide coverage with Three's network

Top SMARTY deals

Bestselling SIM Only Deal
SMARTY Multi SIM Unlimited minutes, unlimited texts, 2GB data 1 month contract £7.50 per month Buy now
Discount on any unused data

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Why choose SMARTY?

Money off your bill for unused data

If you get to the end of the month and you're left with unused data, Smarty will take money off your next bill. For each 1GB you've not used, Smarty will deduct £1.25 from your bill.

Simple, keenly priced plans and no long contracts

Priced from £7.50 per month, Smarty's Small, Medium and Large plans all operate on a month-to-month rolling contract basis. So you're not locked in for a long time and can cancel whenever you like with 30 days' notice.

UK-wide coverage with Three's network

Smarty is a UK-only network at the moment, but will have EU and worldwide roaming in June.


SMARTY bills itself as the “simplest and most honest network ever” and offers just three SIM-only plans, dubbed Small, Medium and Large. All of which feature unlimited UK calls and texts.

  • Small gets you a monthly allowance of 2GB of data for £7.50 per month
  • Medium includes a 4GB monthly data allowance for £10 per month
  • Large is £15 per month and buys you a monthly allowance of 8GB


As you might expect for a network that’s focussed on value, SMARTY doesn’t offer the kind of attention-grabbing customer incentives, such as giveaways and cheap tickets, that you get with the likes of O2 Priority.

But that’s not to say it’s not without some unique selling points. These are:

  • Money back for unused data If you’ve got any unused data at the end of the month, SMARTY will take money off your next bill. You’ll get £1.25 for each unused 1GB.
  • No long contracts SMARTY plans operate on a month-to-month rolling contract basis. So you can cancel whenever you like.
  • Extensive coverage SMARTY uses Three’s network. That means you get 91% 4G coverage across the UK.
  • Referral scheme SMARTY customers who get a friend to join them on the network will be a given a free month. And the friend gets a free month too. Persuade 12 friends to join and SMARTY will give you a whole year free.


SMARTY's service is based on parent company Three’s network. So you’ll get 91% 4G coverage, as well as 97% 3G coverage.


At the time of writing, SMARTY doesn’t offer roaming and is a UK-only network. As a result, you can’t use your UK allowances abroad.

However, from June 2018 that's going to change. From this date, SMARTY is set to introduce inclusive roaming on its plans, so you'll be able to roam free.

Until then, it's also worth noting that right now because SMARTY is a UK-only network, you won’t be able to make international calls.

But you can get around that by using a VOIP service, such as Skype. That means you’ll be using your data to make the call.

Keen to find out more about roaming charges? Here's everything you need to know.

Customer service

SMARTY doesn’t offer customer service telephone support. However, customers can contact support by visiting the SMARTY site and starting a web chat.

The web chat service is available from 8am to 8pm every day, except Bank Holidays.

Not sure SMARTY's for you? Take a look a look at what other providers have got to offer at our SIM only comparison page.