While tel:// URLs open the Phone app without any prompt, there's also a telprompt:// scheme which opens the Phone app with a prompt. As an app developer, would

While tel:// URLs open the Phone app without any prompt, there's also a telprompt:// scheme which opens the Phone app with a prompt. As an app developer, would you ever want to use the latter scheme instead of the former? Turns out, yes, you would. The advantage that you get with telprompt:// is that, once the call finishes, the user comes right back into the app that initiated the call. With tel:// that is not the case.