Tablet SIMs work in a similar way to SIM-only mobile deals. The main difference is that they are data-only with zero calls or texts allowance. You’ll be able to choose from 30-day rolling contracts, 12-month contracts and 24-month contracts. In general, the longer you commit for, the cheaper your monthly fee for a set amount of data will be.
Some providers – including Three and EE – also offer pay-as-you-go packages whereby you purchase a one-off chunk of data that is valid for a specific length of term, such as 24GB for 24 months.