I've just seen this deal on Hot UK Deals and i've never heard of this company called 'GiffGaff'. The price seems ridiculously low, so low in fact that i'm worried it's a scam. Is this a legitimate company and if so, how the hell do they manage to get prices this low? I do apologise if i'm coming across like a total noob but i've literally only found out about this 'GiffGaff' about 10 minutes ago.