If there is any way to ring first a land/cell phone and if nobody answer then forward the call to Vapi without using 2 twilio lines ?

Yes, you can use a Twilio Studio flow to first ring a landline or cell phone, and if there’s no answer, forward the call to Vapi, all using a single Twilio line by handling call status and timeouts.

Thanks for replying, Right now I'm using the twilio webhook and the xml to dial the land/cell phone number and the callback is another url, in that url I call the Vapi number, this works but I need to 2 lines. I tried setting the callback url to the Vapi url, but Vapi is getting or handling that url well, maybe because the call was already answered

How can you program it to redirect after a certain amount of rings or time

Is by time, for example 5 seconds,