*Carry a 911 contact jewelry.
*Emergency speed dial.
*Depending on the type of phone you have, your phone should be embedded with an SOS feature. This feature allows you to contact 911 along with 4 designated contacts (or more depending on which phone you have) by just a few quick clicks of the power button on your phone. You can also enable features that allow you to take pictures of you surroundings, and record audio for 5 seconds.
*Phone trackers: This is not neccessarily a way to contact anyone, but it allows for a trusted person to know where you are at all times.