Please read our instructions carefully
If you are NOT an O2 customer, get your free O2 SIM card here and start enjoying this freebie, as well as lots of other freebies!
If you ARE on O2, head to your Priority App and look for this freebie.
In celebration of National Cookie Day, O2 have teamed up with Millie's Cookies to offer you a cookie of your choice for absolutely FREE!
Once you've got your free sim, pop it in your phone, download the Priority app and away you go to start claiming your freebies.
Find the offer on your Priority Moments app, and pick up yours from your nearest Millie's Cookies store.
This freebie is set to end 18th December so be sure to grab yours before they run out! What a great freebie from O2.