You can access the router's admin page with those steps: 1. connect your phone to the wifi of the router 2. open web browser and type in http://192.168.0.1 (if you have changed the LAN IP of the...

Are the 2 ISP modems at the same place? And did you use the same device to run the test?

There is no compatibility list for TL-WR902AC V1 since this product is not aimed to be used as 3G/4G router and that feature is not promoted also. If you want to get internet from SIM card and use...

Also you can check whether your SIM card support data roaming in France and Spain, and if the SIM card do support roaming, check the APN settings on the M7350 to see whether it matches the settings...

That's not recommended because the device from Belgium may have compatibility issue with the SIM card from Spain. It is safer to get a device in Spain and use it with Spain SIM. For the compatibility...

FDD and TDD are both network types/standards for 4G. The SIM card and the mifi product have to support the same standard to work with each other.