Originally Posted by
yosithezet
Had this when I first got my Fi SIM. The first activation must be in the US where they can contact the base network they use which I think is tmo.
After that I haven't had the issue, but now and then I have to move the SIM from my iPhone to my Pixel to get on a new network when I arrive in a new country. This isn't always the case. For instance I flew from Tokyo to Singapore via Seoul. When I landed in Seoul it worked fine, landed in Singapore and couldn't get a network until I popped it into my Pixel and then back into the iPhone.
figured it out, just needed to add the apn settings. I was thrown by the fact that it automatically connected to 3G but didn’t work. Changed the settings and all was fine, took a little while to get to LTE though. Have also noticed that occasionally it seems to be on 3G, whereas the moto on the actual primary sim never ever displayed anything other then LTE