This is a good article from All Things FirstNet about the system being built for first responders. I just signed up for FirstNet and found we have a local tower dedicated to first responders..

If you're a first responder check out Band 14 a high power band for first responders. If communications are important to your agency, check out FirstNet

Information on Band 14 Link 
While public safety is intrigued by the performance capabilities of the FirstNet system being built by AT&T, first-responder representatives repeatedly have expressed concern that typical LTE devices use only 0.200-0.250 watts of power when transmitting signals. By using HPUE—a 3GPP standard that can be used only on the 700 MHz Band 14 spectrum licensed to FirstNet in the U.S.—devices can transmit signals at 1.25 watts of power, according to Bob LaRose, vice president of business development at HPUE maker Assured Wireless.

IAFF Joins with AT&T to Educate Firefighters on FirstNet Mobile Broadband Services

POSTED BY: EDITORIAL STAFF JUNE 11, 2019

FirstNet is a critical tool to keep firefighters and paramedics safe and ensure effective emergency and disaster response LINK to Article