Do I have to buy a new one if I get a new case?Updated 7 months ago

We suggest that you first try to peel your existing Ethos from your old case and place it on the new one. As long as Ethos is used on the specific phone model. 

Ethos can be used for a new case as long as it is the same phone model (for example, if the design is updated). As each is created for a specific model, it cannot be used with a new phone model.