Apple iPhone - if found please call ...

You can activate lost mode on your iPhone, but it could take up to 2hrs before you are able to go home and do that from one of your other devices or through your online account. The time may be critical as someone may have already found the phone and willing to return it immediately, but he has no means of contacting the owner. My proposal is for Apple to add an option for custom text on your locked screen, which will allow users to put any message, including whom to contact in case the phone is lost. To go even step further one should be able to dial a default lost telephone number on locked screen and speak with the iPhone’s owner or their trusted friend on the spot.