Most developers building AI voice bots start by thinking they need a phone number. Get a number, attach a webhook, receive calls. It makes sense — that's how traditional telephony works. But phone numbers come with friction. You need to provision them (which takes time), pay monthly per number, and deal with geographic restrictions. For internal tools, testing environments, B2B integrations, or AI agent demos, this overhead is completely unnecessary. Here's what most people don't know: you can run a fully functional AI voice bot with zero phone numbers. The Problem With Phone Numbers for AI Bots Phone numbers are great when your users are consumers dialing from a mobile phone.…