RM520N-GL Verizon AT+QCFG="band" just gives error

Technical Subjects Upgrade/Debug
1

AT+QCFG=“band”?
ERROR

AT+QGMR
RM520NGLAAR01A08M4G_01.200.01.200

2

The command AT+QCFG="band" (no question mark) is for earlier model modems.

You need these instead:

AT+QNWPREFCFG="lte_band"
AT+QNWPREFCFG="nsa_nr5g_band"
AT+QNWPREFCFG="nr5g_band"