Was in the same situation. It's either you opt for the CAT LTE-M or NBIoT modules that has many global band modules from variety of brands to choose from. But, the big BUT is these network are not fully supported everywhere, patchy at best I would say. So, you probably have to opt for LTE Cat-1. Not many global modules available unless from Quectel which I uses but the current Qualcomm chip set shortage that the modules are based on brings the lead time to half a year, even for samples. Your typical other manufacturer like Sierra Wireless or Ublox doesn't have global module. SIMCOM has a few modules that I think could fit the global band requirements although not fully in the sense say for NA bands, not all the bands are fully supported. And these modules are based on ASRmicro chip set which brings down the cost a lot lower compared those based on Qualcomm ones. But, again lead time is another issue for these too. Just forget about 3G totally as they are already being sunset in many developed countries and even here in Malaysia.