The Haechi is a handheld mobile device for public safety and disaster relief operations, integrating the functionality of a digital two-way radio and a smartphone to deliver secure and resilient voice communication and enable coordinated responses between police, paramedics, fire crews and the military in the event of a disaster. Public Safety LTE is a telecommunications technology for reliable and fast communications in disaster prevention, preparedness, response and recovery efforts. Haechi establishes a converged common network dedicated to 330 public safety agencies nationwide for prompt emergency response