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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.