Enrique, and everybody facing similar issues: could you please let me know the brand and model of each WiFi router or access point your colleagues and you have tried to connect to that fails to do so?
While I agree with you that it’s not normal for all 12 devices to have issues, after having shipped thousands of these PPM’s there are perhaps a small percentage that can’t connect to (one or more of) the WiFi networks of the owners. So while there is no widespread problem, it could be that (the default configuration of a) certain brand(s)/model(s) router which might be more popular in certain markets / countries IS indeed incompatible with the PPM even though they may be compatible with most other devices in use. So first we’d need to identify if it’s brand / model specific, then perhaps try to obtain one such router / access point to troubleshoot if possible.
Compare the issue with BT connectivity in cars. Some manufacturers of phones don’t get it right in all car brands, but sometimes it’s the car manufacturer who is to blame, or both.
The fact that you say a phone hotspot works indicates that the WiFi antenna is connected and working, that the WiFi chip can set up a connection properly, and that the PPM can connect to the networks and use them. It’s just struggling with some networks, and we need to actually find the solution to make the product work, not just point fingers or assign blame on either side.