I'm getting my Venus Pi setup and I'm curious to know if anyone in the US has the GX GSM or a suggestion for another option? Since its 3G, a lot of carriers are turning down their 3g (Verzion though not GSM at the end of 2019, ATT 2021, T-Mobile 2020). It's attractive as it's a GSM and GPS in one unit as my Pi has 4 USB ports and 3 are taken (BMV, MPPT and Multi). I know I can add a hub, but just trying to simplify things. However it may have a limited lifespan in the US. Any other cell/GPS in one units that work with Venus?