Here is one for the smart phone owners out there I have found a great little app that carries all you information without having to worry about over coming the lock screen function
Now i don't know about you but i am never without my phone so this maybe of use to some people. You can get free version but i paid for the ICE app and it has been time saver (see past post)
Have a look see what you think. Other operating systems will offer a similiar thing at a guess so don't panic all you iphone users.
Take care and stay well