Bit late, not a recommendation, I'm using TP-Link TL-MR6400 with Alfa mobile broadband, cheapest model from a local shop, although it's CAT4, the speed is better than my CAT15 smartphone indoors ~60Mbit router indoor, 90Mbit outdoor. Phone: ~40Mbit indoor same spot, 170Mbit outdoor.
I'm not sure if you need to register these the same way with smartphones coming from abroad.
Detected bands:
Band 20 is better than 3 in a room without a window, while 3 is significantly faster near a glass window and outdoors. Auto always selects 3 even in low signal.
I'd recommend something with 5Ghz Wi-Fi, I'm using this behind a decent access point.
