Who I have the same questioned this topic

The z series is defective and Verizon refuses to replace it.

You are selling a phone that has a factory defect that is inherent and I do not wish to continue replacing my phone. I have seen multiple people with these folding screen phones and they all do the same thing over time. I would suggest that any one that denies this quit their job because they are doing bad things. But they must just be bad people to begin with to condone and cover up this issue. Just give us our money back.
-yours truly. A dissatisfied customer