There must be these independent issues:
1. initialization of the 4G or WiFi radios - presents as a blank triangle (for 4G) or inability to see any SSIDs (for WiFi). This may be due to the inadequate powering up as
@rgledhill mentions, and I believe is what's underlying
@JPC current issue and what I had before. The 4G and WiFi radio powering could be relatively independent.
2. Network denial of service - presents as white triangle with an x, indicating radio is on, but connectivity isn't established. This should not affect the WiFi connectivity directly. Given
@JPC has only one of only a few Polestar in Colorado, this really shouldn't affect him but not me in the Bay Area.
3. WiFi can see/connect to some but not all networks - this could prevent phone tethering and communication with the home network. It should not direct affect 4G connectivity. This may be related to improper powering of the WiFI radio (#1) or some software bug of how it's establishing the connection.
For troubleshooting, need to be clear whether the 4G issue presents with a blank triangle (radio not on/functional) or white triangle + x (radio on, not getting service) and for WiFi whether no networks can be seen (radio maybe not on/functional) or some networks can be seen but not all (WiFi not configured right).
In this US, AFAIK, the issues people have is that the 4G radios aren't turning on properly, not so much that they're not connecting to service. In the UK, the issue is not that the radio isn't turning on but more that the 4G connectivity isn't being established.