I've used many betas before but never experienced this one. Every once in a while (now becoming frequent) I am getting a message stating "capturing baseband core dump". What is this? Anyone else experiencing this? How do I fix this?
It means the cellular network part of the phone is crashing, presumably to buggy firmware version. Short of trying a reset network settings, there won't be anything you can do other than wait for next beta or go back to 8.3.