EM9191 : AT+CFUN=1 returns CME ERROR: operation not supported

It seems to always drop to LTE for some reason.

!GSTATUS: 
Current Time:  163              Temperature: 49
Modem Mitigate Level: 0         ModemProc Mitigate Level: 0
Reset Counter: 1                Mode:        ONLINE         
System mode:   LTE              PS state:    Attached     
LTE band:      B4               LTE bw:      15 MHz  
LTE Rx chan:   2025             LTE Tx chan: 20025
EMM state:     Registered       Normal Service 
RRC state:     RRC Idle       
IMS reg state: UNKNOWN          IMS mode:    Not Support  
IMS Srv State: UNKNOWN SMS,UNKNOWN VoIP
PCC RxM RSSI:  -68              PCC RxM RSRP:  -105
PCC RxD RSSI:  -94              PCC RxD RSRP:  -138
Tx Power:      --               TAC:         717a (29050)
RSRQ (dB):     -16.8            Cell ID:     00cb0e03 (13307395)
SINR (dB):     12.4
NR5G band:       ---            NR5G bw:         ---
NR5G Rx chan:    ---            NR5G Tx chan:    ---
NR5G RSRP (dBm): ---            NR5G RSRQ (dB):  ---
NR5G SINR (dB):  ---

How can I get a hold of 1.7.19.0?