Newcomer network provider SMARTY has introduced a fully unlimited SIM-only plan option for £25 per month, which includes unlimited data, texts and minutes. Right now, customers can get one month for free along with a £25 Amazon voucher (which really means you save £50). The offer ends 12 June.

You can tether and hotspot without any speed restrictions. In terms of roaming, you can use the plan in the EU like you would in the UK, though use in other countries relies on Pay As You Go rates.

SMARTY's coverage is powered by Three, which also has an unlimited SIM plan for £20 per month on now, but it's a 24-month commitment. SMARTY's offer is a 1-month plan which you can cancel at any time.

We've curated all the best SIM-only plans of the month all in one place here. Our comparison tool below also lets you browse through all SIM-only deals across the web, from all networks.

SIM-only Deals - All Networks