Data SIM deals - tablets and mobile broadband

With a SMARTY SIM-only data plan, you pay for the data you use, not the data you don’t.

Data SIM

Switch to a simple SIM-only data plan

Perfect for tablets, dongles, WiFi routers and other mobile devices.

We’re SMARTY – the SIM-only mobile network that’s all about keeping things simple. Our monthly plans start from £6.25 and work with most mobile data devices: tablets, dongles, WiFi routers, laptops, games consoles and more. And you even get money off data you don’t use.

Why use a SMARTY SIM?


No minimum contract


Easy to order and use


Money off unused data

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Our data discount plans

Pay less next month for unused data

All plans include unlimited calls and texts

Our Unlimited plan

Fixed price, unlimited everything else

How it works

How it works

  1. Step 1.Order your preferred plan online
  2. Step 2.Receive your SIM
  3. Step 3.Pop it in your device
  4. Step 4.Enjoy freedom!

Fast 4G and 3G powered by Three

We’re powered by the expansive Three network, which means fast 4G or 3G for 98.3% of the UK population.

Check your coverage

SIM with wings

No long contracts, no ties

Simply pay for your first month up front, then on a rolling monthly basis. You’re free to pause or cancel at any time – no commitment, no hassle. Unlike some SIM contracts, you’re not tied in and there’s no surprise charges. Oh, and there’s no need for a credit check.

Only pay for what you use

Whatever monthly data discount plan you're on, you get credit for any data you don't use. We reckon this makes us one of the best deals around for SIM-only contracts.

  1. 1

    £5 is the base monthly rate included in the price for all data discount plans, offering unlimited standard UK texts and calls. The rest is for data.

  2. 2

    At the end of each month, we take any unused data you have and discount your next month’s plan - at the standard rate of £1.25 per GB, the same price it’s charged at.

  3. 3

    For example, if you’ve got 3GB of unused data, you’ll get £3.75 off your next month’s plan. We even calculate using remaining MBs, not GBs.

    This means you only ever pay for what you need.

Data add-ons

Don’t get stung for extra data

Extra data at only £1.25 per GB

All data discount plans are capped, so you’ll never accidentally overspend if you run out of data. But if you find you need any extra, it’s super easy to add more at a rate of £1.25 per GB.

Data add-ons also never expire. As long as you have a live, current SIM plan, it stays there. Forever. And ever.

Unlimited calls texts

Unlimited UK standard texts and calls

Our SIMs are also ideal for phones. Each plan comes with unlimited UK standard texts and calls included, and you don’t have to change your number when switching.



Check our 4G & 3G coverage

SMARTY connects to 4G network wherever it can. SMARTY is not compatible with 2G handsets.

Check our coverage


No need to change your number

As soon as your SIM is activated you can port your number to SMARTY. You’ll just need a PAC code from your current network.


Adding data or credit

If you run out of data it’s £1.25 per GB - the same as it costs in your plan. To call an 084 or 087 number you can add credit in £5 increments. Add-ons never expire.

Check our coverage


A bit about tethering

You can tether and hot-spot all of your data with no speed restrictions.


Contacting us

The SMARTY team are available to chat online 8am to 8pm, 7 days a week (excluding Bank Holidays). Go to the contact us page and click the little green icon in the bottom-right to start.


Calling abroad

You can now use SMARTY to make calls to other countries from the UK. Calls and texts are taken from your cash balance. See the prices where you want to call.


Roaming & International

You can now use your SMARTY plan abroad. In the EU it works like normal. Outside the EU, or to call internationally, you need to top up your cash balance. See the prices where you’re going.


About our pricing

Everything you need to know about our: prices, discounts, offers and Add-Ons if you’re a customer of ours. See our price guide.


Find out more
  • uSwitch Award - Best Value SIM Only 2019
  • uSwitch Award - Best PAYG Network 2019

Featured in

  • FinancialTimes
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  • uSwitch
  • HuffingtonPost
  • ShortList