If you are in the US, I don't think you have any options left.  The US Government banned the manufacturers (China-based).   Your only option left is to use a cellular router, like the MG21: https://meraki.cisco.com/product/cellular/integrated-antenna/mg21/  Or an MX with built-in cellular, like the MX67C: https://meraki.cisco.com/product/security-sd-wan/small-branch/mx67c/  ... View more