Max Transit version for sailboat in Mexico and S Pacific

I am setting up a communication system for my sailboat. I am currently in San Diego but will spend a lot of time in Mexico and the South Pacific, including NZ and Aus. I have a Peplink AP One Rugged and a switch with POE. I am trying to decide on a modem and antenna. I am leaning towards a Max Transit series modem with either a Puma 221 or a Poynting 7-in-1. I would be very happy if I can get a reliable 10 mbps down and 2 mbps up.
I have 2 questions:

  1. Which Max Transit version will work best in the countries I am looking at? Looking at frequencycheck.com, I think the channels in my target countries are:
    GSM - 850, 900, 1800, 1900
    3G - B1, B2, B4, B5, B8
    LTE - B1, B2, B3, B4, B5, B7, B8, B20, B28, B40, B41
    CDMA - BC0, BC1, BC10
    I am thinking of the MAX-TST-LTEA-K-T, also called the Max Transit Global / CAT12.
    Any recommendations?
  2. I hear that carriers are starting to block some routers on some plans. What happens if I buy a Max Transit and carriers in my locations start blocking? Do they normally offer other (higher priced?) plans I can use?
    thanks
    Pat