Useful Phone Feature

While here in New Orleans my dad forgot his cell phone at the hotel while we left on a short walk through the french quarter.

It got me thinking that cell phone companies should have a feature where a person can call in to their voicemail and turn on their call forwarding. This would mean that if you forgot your phone somewhere (or went swimming with it) you could use a friends phone and easily call forward your phone so you don't miss any important calls.