Your voice agent passed the browser test. The phone line is a different exam.

Here's a pattern I keep running into. Someone builds a voice agent, talks to it from their laptop for an afternoon, and it's great. It catches every date and reads back every order number in a warm, friendly voice. Then it goes live on a phone number and the first week of calls is full of misheard digits and an agent that suddenly sounds tired. What changed was the audio reaching the model. The browser hears a cleaner world When you test from the browser, your voice reaches the spee