MILGRAD/ JSS-55555 compliant dual band (Band n3 & N28) 5G mobile handset (UE) for various applications having a power output of 500MW or better with a high gain antenna of 3 dBi or better, internal MIMO 2T4R or better, physical PTT, detachable battery capable of providing standby time of 48 hours or better and talk time of 12 hours or better in QPSK modulation