All new giffgaff SIMs receive a bonus £5 credit which will appear on your giffgaff account within 24 hours.
"I joined as you get the best network with packages to suit you changeable month on month based on how YOU want to manage your account. IT'S SIMPLY BRILLIANT" shawndenton, giffgaffed since 02/09/2011
"Only just joined GiffGaff but it was a seamless and very simple thing to do. It seems to be the cheapest and most generous network that exists! A lesson to the other networks possibly?" paulcoops, giffgaffer since 14/08/2011