Compare Smarty SIM Only Deals

Smarty uses Three's network for everything, so your signal for calls, texts and data is the same as Three in your area. You get 5G where Three has it. Coverage is the first thing to sort out before any switch, so confirm Three has reliable signal at the places you spend most of your time.

Smarty keeps it deliberately simple: every plan is 30-day rolling, with no annual contract anywhere in the range. You pay month to month and can change or cancel whenever you like, which suits people who do not want to be tied in. Unlimited data plans are available if you are a heavier user. The live deals above show the current allowances and prices so you can pick the one that matches how you use your phone.

Smarty sells 30-day plans with no mid-contract price rise, one of several rise-free networks in our guide to SIM only mid-contract price rises.

The headline draw is the pricing model: low, straightforward costs with no long commitment and no credit check to get started. On some plans you are refunded or discounted for data you do not use, so you only really pay for what you need. With unlimited options at the top end and rolling terms throughout, Smarty is built around value and keeping things uncomplicated.

Smarty suits anyone who wants Three coverage on a tight budget and likes the freedom of paying month to month. Because there is no annual contract and no credit check, it is an easy option if you would rather not be locked in or want to avoid a credit search. The unused-data refund on some plans also appeals to light users who hate paying for allowance they never touch.

Smarty, iD Mobile and Three all sit on Three's network, so coverage is broadly the same. The difference is in how they are sold. Smarty is rolling-only with simple low pricing and an unused-data refund on some plans, iD Mobile adds data rollover and capped contracts, and Three is the network direct with its own rewards. Compare them on monthly cost and the terms that suit you.