How are you?
You would need a new sim, you can order one from:
You can only perform a sim swap between 4:30am and 9:30pm and once started it is irreversible so make sure you have backed up all your contacts, texts to your phone memory. Alsdo when transferring you will transfer any active goodybag, credit and account to the new sim.
To read more on how to do this click the below link:
Hope this helps
I need a micro sim for my new iPhone 5c as my present one for my 4g won't fit?
Can giffgaff send me one ?
yes, just order the mirco sim from the giffgaff website.
when the sim arrives do what is known as a sim swap. more info on how you do that here http://community.giffgaff.com/t5/giffgaff-Top-Tips
by doing sim swap your new sim will be linked to your old account and you will get to keep the same number. any goodbag active on your account and and top up balance will also be moved over and linked to your new account.