If I remember correctly this was added automatically at the time of the sale when purchasing eligible Samsung products over £500 @Sel2474
Check if this was added when you placed your order.
Looking at Samsung.com the speaker no longer appears to be available as a promotional item.
Daily Driver > Samsung Galaxy s²⁵ Ultra 512Gb ~ Titanium Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
