I have been testing the Pytrack with a Fipy as well as with a Gpy. The same code is executed on the Fipy and Gpy.
The GPy + Pytrack combo works, the Fipy + Pytrack combo does not.
I enable the LTE, connect to the network and sync the RTC via NTP.
If I put the Fipy on an expansion board (v3), it works.
The modem's firmware is 33988 and I have tried the 1.17.3 and the 1.18.0 on the Fipy as well.
I though that maybe it was a power issue, so I have tried running it with a battery too. No luck.