Same problem for a ZTE modem in LTE mode:
modem-manager[29629]: <debug> [1349262318.552754] [mm-at-serial-port.c:334] debug_log(): (ttyUSB3): --> 'AT+ZPAS?<CR>' modem-manager[29629]: <debug> [1349262318.568652] [mm-at-serial-port.c:334] debug_log(): (ttyUSB3): <-- '<CR><LF>+ZPAS: "4G","PS_ONLY"<CR><LF><CR><LF>OK<CR><LF>' modem-manager[29629]: <debug> [1349262321.803912] [mm-at-serial-port.c:334] debug_log(): (ttyUSB3): --> 'AT+CIND?<CR>' modem-manager[29629]: <debug> [1349262321.827096] [mm-at-serial-port.c:334] debug_log(): (ttyUSB3): <-- '<CR><LF>+CIND: 5,0,1,1,0,0,1,2<CR><LF><CR><LF>OK<CR><LF>'
giving signal quality 0 even though it is quite good signal.
Same problem for a ZTE modem in LTE mode:
modem-manager[ 29629]: <debug> [1349262318.552754] [mm-at- serial- port.c: 334] debug_log(): (ttyUSB3): --> 'AT+ZPAS?<CR>' 29629]: <debug> [1349262318.568652] [mm-at- serial- port.c: 334] debug_log(): (ttyUSB3): <-- '<CR><LF>+ZPAS: "4G","PS_ ONLY"<CR> <LF><CR> <LF>OK< CR><LF> ' 29629]: <debug> [1349262321.803912] [mm-at- serial- port.c: 334] debug_log(): (ttyUSB3): --> 'AT+CIND?<CR>' 29629]: <debug> [1349262321.827096] [mm-at- serial- port.c: 334] debug_log(): (ttyUSB3): <-- '<CR><LF>+CIND: 5,0,1,1, 0,0,1,2< CR><LF> <CR><LF> OK<CR>< LF>'
modem-manager[
modem-manager[
modem-manager[
giving signal quality 0 even though it is quite good signal.