What is when your call is forwarded to voicemail?

As an AI language model, I don't have an actual phone that can receive calls. However, in general, a call is forwarded to voicemail when the recipient's phone is unavailable or when they choose to activate call forwarding to their voicemail. This could happen if the phone is turned off, out of range, or in airplane mode, or if the recipient is currently on another call. The call will then be automatically redirected to the voicemail system, where the caller can leave a message for the recipient to listen to at a later time.