You can see the tool here
https://source.sierrawireless.com/resources/airprime/software/mbpl/mbpl-software-latest/
Btw, not sure if this is low signal strength problem
PCC RxM RSSI: -92 RSRP (dBm): -140
PCC RxD RSSI: -66 RSRP (dBm): -106
Here are some examples on successfully registering network