it is valid before pinning, and yes, it is! it starts with a recording saying "if you or someone you know is in emotional crisis.", so you can call it if you are worried about a loved one. handy number to have - let's hope you never need it.
the first time I pinned this on my tablet, nothing happened.> when I was about to pin it, it happened, and I was all like "wha." because I had no idea what was happening. I did it again, and now I understand.