07-09-2013 13:58 - edited 07-09-2013 14:02
You can get one from O2, see "Contact us" at the foot of the page for the number, or go to an O2 shop and they'll do it all for you.
If you get one sent out you can transfer your number here:
Text DEC to 70000 (free text) to donate £5 or online: http://www.dec.org.uk/appeals
Sky Unlimited Broadband - Legacy O2 Simplicity 20 - O2 Wallet - Nexus 4 Android 4.4.4