Robocalls have become a ubiquitous problem, with nearly 50% of all US mobile calls expected to be robocalls in 2019, according to First Orion. This issue has sparked concerns among developers and consumers alike, as it disrupts daily life and erodes trust in phone communications. Twilio's CEO, Jeff Lawson, explains that the root cause lies in the evolution of telecommunications networks, which were originally designed by a single company, allowing for little security or trust. As a result, malicious actors can easily impersonate others on the network. To address this issue, Twilio has implemented various safeguards, including requiring phone number confirmation, billing by the minute, and geographic permissions to prevent robocalls. Lawson envisions a future where users have control over their phone communications, with a focus on verifying caller identity through digital signatures like STIR/SHAKEN and establishing reputation systems to determine whether a call is legitimate or not. By restoring trust in phone communications, Twilio aims to put users back in control of their devices.