/dev/qcqmi0 or /dev/qcqmi1


I work with location based services using the MC7304 modem and QMI.
Seemengly at random I amble to connect either /qcqmi0 or /qcqmi1.
Sometimes I get Unable to find device on modem_index 0, sometimes I get the error at modem_index 1
To my experience I only seem to get NMEA Output on 0, not on 1.
Should both 0 and 1 (qcqm0 and qcqmi1) provide NMEA output?
If not, how can i define the qmi port on qcqmi0 as a standard?