Here we go. Details are: The £10 bonus credit is given to new sign up. The sim card is free £10 credit is needed to activate the card.
So £10 gets you a sim with £20 credit and cheap calls.
Plus I thought it was worth mentioning again as the old offer was to expire in Dec but they have extended it and added new Gold numbers.
From the website.
9p per minute for calls and 6p a text. By switching to Family Mobile you pay £10 for the start pack. You will save at least 40% on Pay As You Go calls compared to Orange. O2, T-mobile and Vodafone.