Hey @Francis.duhaut,
We’re in British Columbia, Canada and testing with Sierra Wireless SIM cards. This could be related to the 3G issues you mentioned in the USA (since we’re so close). We’ve managed to code around almost all of the modes of failure, but the one that typically requires a reboot to fix occurs when cm radio shows the following output: https://gist.github.com/nvandoorn/40aa270d528174345524c88dc6c3cf2b
I’ve also been very cautious about what routines I call from the modemService since it’s not strictly multi app safe and is already used by the dataConnectionService.