
Netgear Hotspot Nighthawk M1

Netgear Hotspot Nighthawk M1
Good morning community, does anyone already have experience with the device in the USA and Canada in terms of frequency bands ? Last time I was in the USA I had to buy a box from AT&T with a SimCard to make it work (I was using a TP HotSpot at the time).
For the sake of correctness: T-Mobile CDMA frequencies were supported in San Francisco. But only with 3G speed according to the display. In practice, however, it was unusably slow (just enough for WhatsApp chats).
And I don't know whether T-Mobile also uses CDMA everywhere --> you need LTE, everything else is rubbish.
I travel frequently, does it work with SIM cards and in countries: Switzerland, Ukraine, Thailand and China?