Unlocked Android Wear smartwatches work well with Project Fi, Ting and other prepaid plans economically–here’s how.
Project Fi uses three LTE carriers plus VPN WiFi. Here are some practical details on how the Project Fi aggregating MVNO works.
Google Pixel Phone has many LTE bands, allowing good international roaming–here are some details.
Understanding LTE smartwatch coverage by example of LTE Android Wear smartwatch in rural areas.
Detailed technical review of Verizon Mifi w.r.t. antennas and frequency