USB ADSL2+ Modem or USB xDSL Modem for using Openwrt

I not found on web anything for modem adsl usb. It's exist?
I have Xiaomi R3G v1 with usb 3.0 (real 2.0) but working.

And not need modem if found USB Modem
My connection is ADSL2+

I wait for your replay's.