SMARTY SIM only deals
Last updated: 22 October 2026
SMARTY is a low-cost UK mobile brand owned by Three, selling simple 30-day rolling SIM only plans. We list SMARTY's advertised plans side by side so you can compare data and price before buying direct.
What SMARTY offers
SMARTY keeps its range simple: a handful of 30-day rolling plans from small data allowances up to unlimited data. Because every plan is rolling, there's no long commitment — you can switch plans or leave with notice.
SMARTY runs on Three's UK network, so coverage and 5G speeds follow Three's footprint. Check Three's coverage map for your postcode if signal matters to you.
What to check before you buy
Work out your real monthly data use from your current provider's app. SMARTY's smaller plans are very cheap, and many people use far less data than they think — especially if they're often on Wi-Fi.
Check the plan's terms on SMARTY's website for tethering rules, EU roaming limits and any fair-use policy on unlimited plans.
No credit check
SMARTY's 30-day rolling plans are paid in advance, so they typically don't require a credit check. That makes them accessible if you're new to the UK or prefer not to undergo a credit search.
Frequently asked questions
Which network does SMARTY use?
SMARTY is owned by Three and uses Three's UK network for coverage and data.
Is SMARTY a contract?
No long contract — SMARTY plans are 30-day rolling plans you can change or cancel with notice.
Does SMARTY do unlimited data?
Yes, SMARTY offers an unlimited data plan. Check its website for the current price and any fair-use terms.
Can I keep my number with SMARTY?
Yes. Get a PAC code from your current provider and give it to SMARTY when you join. The move usually takes one working day.
Read more
- Our step-by-step buying guide
- SMARTY's official website
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Listings are dated snapshots of providers' own pages (checked 22 October 2026), not live prices. SMARTY is a trade mark of its owner; CompareDirect is independent and is not endorsed by SMARTY. Always confirm current prices and terms on the provider's website.