https://www.gl-inet.com/products/gl-x750/ https://www.gl-inet.com/products/gl-x3000/

I had a similar set up earlier this year where I was using an OTG cable from a phone to a router.

Trust me when I say switching to a cellular modem was the best decision I made. Just restore the imei... add a vpn... and enjoy unthrottled internet.