I couldn't find enough info on integrating a T-Mobile business number with Vapi, so I'm escalating this to a human expert for you!
Just so you know, Vapi has guides for integrating numbers from Twilio ([see here](
https://docs.vapi.ai/quickstart/import-twillio)) and Telnyx ([see here](
https://docs.vapi.ai/telnyx)), but nothing specific for T-Mobile. Hang tight—someone from the team will get back to you soon!