giffgaff

No deals available with a 1 Month term.
Here are the cheapest sim only deals and the cheapest unlimited data SIMs.

Why choose giffgaff for a SIM Only deal?

Giffgaff is owned by O2’s parent company Telefonica and runs on O2’s network so you’re guaranteed great coverage. Giffgaff’s flexible 30-day SIMs let customers choose the perfect mix of allowances for them but if they want to change to a different plan then that’s fine too, because at giffgaff you’re the boss – they’ll even tell you if you can save money by changing to a different Goodybag! Refer your friends to earn PayBack points and then chat for free with free-to-giffgaff calls.

Check out the SIM Only deals from any of these UK Networks.

If you use a lot of mobile data then we have you covered, check out the today's best Unlimted Data SIM from across all available UK Networks.