with WP77 module FW 14, if network lost, I can see there is NMEA data at 1Hz at “cat /dev/nmea” after AT!GPSFIX=1,255,50
root@fx30:~# cm radio
Power: ON
Current Network Operator:
Current RAT: Module not registered on network, RAT not available
Status: Not registered and not currently searching for new operator (LE_MRC_REG_NONE)
Signal: No signal strength (0)
PS: Packet Switched Not registered (LE_MRC_REG_NONE)
root@fx30:~# cm info
Device: WP7702
IMEI: 352653090002791
IMEISV: 6
FSN: VU735370340201
Firmware Version: SWI9X06Y_02.36.06.00 63d944 jenkins 2020/12/10 19:12:28
Bootloader Version: SWI9X06Y_02.36.06.00 63d944 jenkins 2020/12/10 19:12:28
MCU Version: 002.015
PRI Part Number (PN): 9907365
PRI Revision: 001.001
Carrier PRI Name: GENERIC
Carrier PRI Revision: 001.071_001
SKU: 1103530
Last Reset Cause: Reset, User Requested
Resets Count: Expected: 388 Unexpected: 28
root@fx30:~# cat /dev/nmea
$GPVTG,,T,,M,,N,,K,N*2C
$GPGSA,A,1,,,,,,,,,,,,,,,,*32
$GPGRS,,,,,,,,,,,,*51
$GPGLL,,,,,,*50
$GPGGA,,,,,,0,,,,,,,,*66
$PQXFI,,,,,,,,,,*56
$GPRMC,,V,,,,,,,,,,N,V*29
$GPGLL,,,,,,*50
$GPVTG,,T,,M,,N,,K,N*2C
$GPGSA,A,1,,,,,,,,,,,,,,,,*32
$GPGRS,,,,,,,,,,,,*51
$GPGLL,,,,,,*50
$GPGGA,,,,,,0,,,,,,,,*66
$PQXFI,,,,,,,,,,*56
$GPRMC,,V,,,,,,,,,,N,V*29
$GPGLL,,,,,,*50
$GPVTG,,T,,M,,N,,K,N*2C
$GPGSA,A,1,,,,,,,,,,,,,,,,*32
$GPGRS,,,,,,,,,,,,*51
$GPGLL,,,,,,*50
$GPGGA,,,,,,0,,,,,,,,*66
$PQXFI,,,,,,,,,,*56
$GPRMC,,V,,,,,,,,,,N,V*29
$GPGLL,,,,,,*50
$GPVTG,,T,,M,,N,,K,N*2C
$GPGSA,A,1,,,,,,,,,,,,,,,,*32
$GPGRS,,,,,,,,,,,,*51
$GPGLL,,,,,,*50
$GPGGA,,,,,,0,,,,,,,,*66
$PQXFI,,,,,,,,,,*56
$GPRMC,,V,,,,,,,,,,N,V*29
$GPGLL,,,,,,*50
^C