The only thing I see that could be a problem is you don't have QA00579*Enable Dual Band Operation. Even if it's built for dual band it it's not enable you want be able to use it.
Sent from my SM-G960U using Tapatalk
Looks like the OP has a depot hacked flashcode and the perpetrator forgot to enable dual band operation.
Decoding Flashcode: 901208-001492-2
Platform: APX7000
Q806: ASTRO IMBE Digital Operation
G996: Over the Air Provisioning
QA00569: Primary Band: 700/800
QA00574: Secondary Band: VHF
H38: SmartZone Systems Operation
Q947: APCO Packet Data Interface
Q173: SmartZone Omnilink MultiZone Operation
QA00580: Enable TDMA Operation
Q361: ASTRO 25 9600 Baud Trunking
QA00577: Front Display and Full Keypad (M3)
QA00579 is definitely missing.