Some providers offer SIM only deals without the need for a credit check. These deals will normally last no more than 30 days and you pay the monthly fee in advance of your usage period. Any deals longer than 30 days, such as a 12-month contract will normally require a credit check by the provider.
It is possible to get a SIM only deal without a credit check. These deals are perfect for users with no credit history, such as students or those with low credit score that needs repairing. If you have a low credit score, signing up to these deals could build your score if you continue to pay the monthly fee.