Smarty is a SIM-only mobile network running on Three’s UK network, with 99% 4G/5G coverage and no annual contracts. Plans roll monthly, from light 5GB bundles right up to unlimited data, making Smarty a great fit for switchers who want flexibility, students on a budget, and anyone fed up with overpaying on a traditional contract. EU roaming is included as standard, with no credit check to join.
Looking to spend less on your next SIM? Our Smarty discount codes are the fastest way to cut the cost of Smarty’s no-contract plans.
Smarty is known for shaking up SIM-only pricing with double-data promotions that cut the cost per GB without a price rise in sight.
Around Black Friday and into the New Year, Smarty has a track record of running some of its biggest limited-time plan upgrades, often doubling data on popular bundles.
Keep this page bookmarked — our Smarty discount codes are updated as soon as a new saving lands.
There’s more than one way to pay less for your Smarty SIM:
Scroll up and grab our Smarty voucher codes to stack with these.
Yes — we list the latest Smarty discount codes and promo codes on this page, updated regularly.
Copy the code from this page, head to smarty.co.uk, choose your plan and enter the code at checkout.
Yes, verified students can get a discount on SIM plans through Student Beans.
Smarty doesn’t run its own NHS scheme, but it’s worth checking Blue Light Card, and everyone can use our Smarty voucher codes regardless of occupation.
Yes, standard delivery is free on every SIM with no minimum spend.
Yes, Smarty offers free returns within 30 days of delivery.
Smarty’s best offers usually appear around Black Friday and the New Year, often doubling data for a limited time.
Smarty doesn’t run a standalone NHS discount scheme right now, but it’s worth checking your Blue Light Card account for any live Smarty offer. In the meantime, NHS staff, blue light card holders and key workers can use our Smarty discount codes and voucher codes just like everyone else, and anyone on qualifying benefits can also look at Smarty’s lower-cost Social Tariff.
Full-time students aged 16+ can verify with Student Beans for a discounted Smarty SIM. Refer a friend and you’ll both bag a reward once they renew, with no limit on how many friends you invite. There’s no loyalty scheme to join — every customer gets the same rolling, no-contract deal, so the easiest perk is simply applying our Smarty promo codes at checkout.
Smarty’s biggest offers tend to land around Black Friday and into January, when data allowances on popular plans are doubled for a limited time at no extra cost. Keep checking back — we update our Smarty discount codes and voucher codes as soon as a new seasonal saving drops, so you never have to pay full price.
Pair free delivery with one of our Smarty discount codes for the lowest possible cost on your new SIM.
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