The long march to the availability text-to-911 is almost over, with Verizon Wireless (NYSE: VZ), AT&T Mobility (NYSE: T), Sprint (NYSE: S) and T-Mobile US (NYSE:TMUS) having committed to making the service available for customers by May 15. The carriers agreed to the text-to-911 mandate in December 2012. Text-to-911 is useful in situations where people feel unsafe or unable to call and speak to a 911 dispatcher. However, as CNET notes in a helpful explainer on the topic, not every jurisdiction will be supporting text-to-911 service on May 15, as it is up to local emergency call centers, or PSAPs (Public Safety Answering Points), to implement the technology. The FCC has a list of PSAPS that currently support text-to-911. However, the FCC has stressed that texting to 911 should be used as a last resort. In January, the FCC said it would consider a rule that would require all wireless carriers and providers of over-the-top messaging applications to provide text-to-911 service by the end of 2014. Article