You don't have to spend any money to get a SIM card for your phone. The networks and MVNOs on this page will all send you a Pay As You Go SIM card for free.
These providers all allow you to request a SIM card without paying an upfront cost.
giffgaff
giffgaff will send you a free SIM in personalised packaging within a couple of days. Add a data goodybag for a plan that is better value than most Pay Monthly SIM Cards.
A free SIM card is a great idea but you do get better value from the bundles and bolt-ons offered by the networks. If you plan to use your SIM Only deal in your main phone and use it regularly then just using Pay As you Go may not offer the best value. You can ass a bundle at a later date though so you don’t have to commit straight away.
Why should you choose a Pay as you go plan
Most Pay As You Go SIM Only Deals don’t have a credit check and you have full control on how much you want to spend.
Pay as you go SIM plans give you just what you need – access to texts, calls, data and international minutes when you need them most.