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Various logos of UK mobile networks

SMARTY's unlimited data SIM only: now £18.75 a month (save 25%)

SMARTY logo and SIM card

The retailers featured on this page may compensate us when our readers follow links to their websites and make a purchase. More

At just £18.75 a month, SMARTY's unlimited data SIM only plan is the cheapest unlimited deal in the UK but are there any restrictions on it? SIM Sherpa is your trusty guide. Last updated: September 10th 2019.

What you get

SMARTY's unlimited data plan

Here's the deal this article's about:

Unlimited
minutes
+
Unlimited
texts
+
Unlimited
4G data
=
£25 £18.75 a month
on a 1-month contract
(opens in new tab)

The benefits

It's unlimited data on a cheap 1-month contract

SMARTY's unlimited data plan offer

Leading pricing and no credit checkSee full details

at SMARTY.co.uk
(opens in new window)

The first thing to say about SMARTY's new unlimited data plan is that it's currently the cheapest unlimited deal on the market (the closest prices are £20 a month on a 12-month Three contract or 6 months half price on a 24-month deal for £20 a month).

It gives you unlimited 4G data, which isn't subject to any speed restrictions or traffic management, which gives it an immediate edge over giffgaff's Always On SIM for the same price.

You can even use the SIM directly in a tablet or iPad to give you unlimited mobile broadband out and about.

Being on a 1-month deal is a real benefit too. If you decide you don't need so much data, you can switch plans month-to-month. Or if you're fed up with SMARTY completely, you can just stop buying the plan and leave.

And because you pay for SMARTY's plans up front with a registered credit or debit card, there's no credit checks you need to pass in order to get the deal.

Useful link: Read our full SMARTY network review

SMARTY are already a good network to join on any deal

SMARTY's network map

Make sure they have 4G/3G where you areCheck their signal

at SMARTY.co.uk
(opens in new window)

Before SMARTY came out with this unlimited data plan, we already rated them as a decent no-frill provider, with a great unique benefit. They pay you back for unused data (this doesn't work on the unlimited plan).

99% of the UK population can get their 4G where they live thanks to the Three network that SMARTY use. This doesn't count other places like roads, railway lines and countryside so test their signal everywhere you use your phone here.

We also expect customers on the SMARTY network to get 4G download speeds that average around the 20 Mbps mark, a speed that comfortably lets you stream all that unlimited video without buffering.

And if you're moving from another mobile network, you can bring your current mobile number with you. The process is dead easy and SMARTY have instructions on how to do it here.

Useful link: Order SMARTY's unlimited data plan

How SMARTY's deal compares

Its main rival is from SMARTY's parent network Three

Three logoThree's unlimited data SIM offer

On a 24-month contractSee Three's deal

at Three.co.uk
(opens in new window)

You can't currently beat SMARTY's unlimited data deal for price, even if you were willing to commit a longer deal. Three's 12-month SIM is £1.25 a month more expensive:

Even if you're willing to commit to a 24-month contract, you'll still spend more on average per month with Three's 6 month half price offer:

It also comes with a few extra benefits you don't get on SMARTY, like inclusive roaming in these 71 countries (up to 19GB a month) and free upgrades on easyJet(!). You can use Three's for tethering but not directly in a tablet though.

SMARTY's deal works out £5.25 cheaper than Three's equivalent 1-month deal:

There's also Virgin Mobile's deal that comes in more expensive and is on a longer 12-month contract too. You also have to have Virgin Media broadband or TV at home to be able to buy it:

Or there's also giffgaff's Always On that does limit you to 2G speeds after 40GB usage but otherwise there are no caps on the number of gigabytes of data you can use:

So overall, SMARTY's is currently the joint cheapest unlimited data deal. And it is the cheapest one on a 1-month contract.

Useful link: Order SMARTY's unlimited data plan

Restrictions on SMARTY's unlimited data deal

The only real limitations are on roaming

SMARTY unlimited data free EU roaming

Use up to 19GB in the EU at no extra costAll roaming costs

at SMARTY.co.uk
(opens in new window)

Like practically every other mobile provider, SMARTY offers roaming at no extra cost in the EU.

On any of SMARTY's capped plans, you can normally use your entire data allowance abroad. But if you're on the unlimited plan, there's a limit of 19GB a month you can use (that's absolutely loads by the way).

Other than that, as long as you're not using the SIM for commercial purposes yourself, or putting unusual amounts of traffic on the mobile network, you won't hit a data limit or be stopped by SMARTY.

Useful link: SMARTY's guide to tethering on their network

The deal

Unlimited
minutes
+
Unlimited
texts
+
Unlimited
4G data
=
£25 £18.75 a month
on a 1-month contract
(opens in new tab)

SIM Sherpa can help you find your next SIM only deal

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