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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 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

We’re featured on Read what they have to say.

All the data you need for less

Data discount plans

Get money back for unused data

All plans include

  • 1 month plan, cancel anytime

  • Unlimited calls & texts

  • Unrestricted tethering in the UK

  • No credit check

  • Fast 4G & 3G data

  • No speed caps

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 99.5% of the UK population (outdoor).

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 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 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 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 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.


Have more questions?


  • uSwitch Award - Best Value SIM Only Winner 2020
  • uSwitch Award - Best Value SIM Only 2019
  • uSwitch Award - Best PAYG Network 2019

Featured in

  • FinancialTimes
  • TechRadar
  • uSwitch
  • HuffingtonPost
  • ShortList