Can also be friends, not just family. You all have to be on o2 network.
The Bolt On Owner pays the Bolt On fee of £7.50, provides the mobile numbers of the other 4 family / friends, and then unlimited calls, texts and picture messages between all 5 people within the group for a month. Not just between the Bolt On owner and the other 4 people, but unlimited calls/texts between any member of the calling group.
Your Family Bolt On:
1 person in the group pays £ 7.50* per month and 5 friends or family members get to stay in touch.
Your Extended Family Bolt On:
if your family's that little bit bigger, you can add an extra 5 friends or family members to make a total of 10 for £12.50* per month.
Minimum period is one month subscription. Have to cancel more than 48 hrs before the renewal anniversary or you'll be charged for the following month.
Open to PAYG as well as Pay Monthly Customers. Available online. Not sure about instore.