This app, Advanced 911, lets you text 911, send photos, plus it automatically sends your location (address, GPS lat and long, and Google maps link - Nice). This is important since the pre-installed iPhone SMS/Texting app, Messages, doesn't support texting to 9-1-1. 911 texts go nowhere! In fact, Advanced 911 is the only app available to do this! If a 9-1-1 center isn't available, it helps me send a message to a friend with my location asking them to get me help. The app also includes a 911 dialer on the home screen so you can easily call 9-1-1. It can be downloaded free here (it also has no ads): http://itunes.apple.com/us/app/advanced-911/id455783722?mt=8 . .