I believe the speaker phone is the issue. Like any new thing there are bugs in the system to work out.

I'm staying with my boulder for the time being.
Funny, the other day at outdoor camp one of the parents braged about thier' fifth grader having the same phone. I said I killed two phones, dropped in near boat ramps. My orange boulder might not be a perfect fit due to lesser Verizon coverage.
The weather resistant phone feature is what keeps me with this service provider.