Hello!
According to Chateau LTE6-US product page https://mikrotik.com/product/chateau_lte6_us , the product is "US carrier-certified". I have attempted to activate a Verizon SIM card using Chateau LTE6-US IMEIs (I have 3 of them) and none of them were actually worked, message being that product is not eligible as it is not certified with Verizon. Has anyone been successful at doing this? Thanks!