Do the following:
- In Contacts, move to the right to open the groups list submenu.
- Select Options > New group.
- Write a name for the group or use the default name Group (number), and select OK.
- Open the group, and select Options > Add members.
- Scroll and select a contact. To add multiple members at a time, repeat this action on all the contacts you want to add.
- Select OK to add the contacts to the group.