ATT Nighthawk LTE Mobile Hotspot Router external antenna choices

[James56]

Looking to get an external (or two) antenna(s) for my ATT Nighthawk LTE Mobile Hotspot Router. I am on a boat in rural Alaska that moves around so it will have to be omnidirectional. Does anyone know:

1: which frequencies the antenna should favor

2: have any hot tips on which model to try

thanks

[Richard_J]

Recommend this outdoor antenna for your Nighthawk M1: https://www.4gltemall.com/4g-high-gain-lte-panel-flat-outdoor-antenna.html