Voicemail

Thanks

When that happens its because the phone is off I believe!

It means they cannot answer they may be driving,in a meeting.So they switch it off and the voice mail takes over.

yeah it can be plane mode or even their phone is shutoff or pushed ignore on their call

It is a great benefit from the today's technology for keeping the life faster without making interruption for updating especially while someone is busy with his/her other important works. In other words we can define it as "keep someone's self connected with his/her business world". It also helps to find more times to work or to spend with someone special.