SMARTY SIM-only deals

SMARTY is a UK mobile network that keeps things simple. Launched in 2017 by Three UK, it runs on Three's 4G and 5G network, giving you coverage across 99% of the UK. SMARTY only offers SIM-only plans: no phone contracts, no hidden fees, and no lengthy tie-ins.

All SMARTY plans are on a 30-day rolling basis, which means you can change or cancel your plan every month. It is one of the most flexible networks in the UK, perfect if you do not want to be stuck in a long-term deal.

Compared to big networks like EE, O2, and Vodafone, SMARTY is much cheaper for the same or more data. You are not paying for a brand name, you are paying for the service. And since SMARTY uses Three's network (one of the UK's four big carriers), the coverage is solid.

If you already have a phone and just need a SIM, SMARTY is one of the best value choices in the UK right now. It is especially good for people who want flexibility: no 12 or 24-month lock-in, just a simple monthly plan you control.

SMARTY works really well if you are:

Looking for a cheap monthly SIM plan without a long contract

Already happy with your current phone and just need a new SIM

Someone who travels to the EU and needs data abroad

A light data user who wants money back if you do not use it all

A family or group looking to save with a multi-SIM discount

Someone who wants to avoid a credit check when signing up

SMARTY runs on Three's network, one of the UK's four major mobile networks. You get 4G coverage in 99% of the UK, and 5G is available in many towns and cities. Three is also in the process of merging with Vodafone in the UK, which means SMARTY customers could benefit from even wider coverage in the future through the shared network (Multi-Operator Core Network).

SMARTY also has Wi-Fi Calling on all plans. So if your signal is weak indoors, you can still make calls and send texts over Wi-Fi with no extra charge.