SMARTY's £10 SIM only deal with 80GB data: is it any good?

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Here's how to get SMARTY's hidden SIM only plan that gives you 80GB monthly data. We show you everything you get in the offer. Last updated: 11th February 2026
Is SMARTY’s £10 deal any good?
One of the best big data 1-month SIMs in the UK
(4 out of 5, deal value rating)
If you’re in the market for a healthy chunk of data, SMARTY have given us an exclusive deal that offers you twice as much data as if you’d just rocked up on the main part of their website (80GB instead of 40GB):
There’s no trickiness to the plan. It’s a straight up 40GB extra data boost for as long as you stay on the plan. Don’t change to a different deal and it stays at 80GB for your whole time with SMARTY (see full terms here).
The only real restriction is when you can order it. The deal is currently set to only last until 23:59 on 16th February. So you do need to move quickly. We don’t know what offer will replace it.
Useful link: Get the exclusive plan here
80GB data is definitely meant for heavy mobile users
If you’re someone who spends most of their time at home on WiFi or rarely does things like streaming out and about, this plan is probably a bit over the top for your needs. It’s meant for people who use their phone alot.
80GB is enough to let you stream HD videos for an hour or more every single day, so this £10 plan would suit anyone with long periods to kill outside the home. Think commuters or students between lectures.
On top of that you’re also getting unlimited minutes and texts (including MMS on SMARTY). You also get inclusive EU roaming, though it’s worth knowing you can only use 12GB per month there, not the full 80GB.
Useful link: Read our full SMARTY review
You’ll get access to Three’s superfast 5G network
One of the best reasons to join SMARTY is the fact they use Three’s superfast 5G network, which is setting the pace nationally for the speeds it delivers. Their 4G typically performs above average.
It is a little dependent on local coverage. So do check SMARTY’s map here for what you can expect. Don’t just look at home. Think about everywhere you regularly use your mobile.
The other thing this deal has going for it is how flexible it is. We think SMARTY are one of the UK’s least restrictive networks. It’s a 1-month plan with no contract. You can change plans or leave with no notice.
There’s not a huge amount to lose by joining SMARTY. Their online-only customer service is our main gripe. But otherwise, it’s a cheap deal that won’t go up in price. You’re getting a lot for your money.
Useful link: See all plan details here
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