Sooo ... I finally got myself an additional SIM for my Pro1-X. And ... things seem to be bad ... Very bad ... So bad, that I now regret relativizing some of the devastating experiences others have posted here before ... Apologies, guys!
I got my Pro1-X two months ago (from Expansys) and found its WiFi and GPS functions to be somewhat on par with the - albeit not great - capabilities of my Pro1. Based on that, I extrapolated that telephony could not be much worse, either. I think I've never been that wrong!
After a few hours of testing, the Pro1-X's GSM/LTE modem seems to be a disast