Hello everyone, 

Currently I use speedport smart router as rental with my campaign. I want to change my tariff since it will expire next month with fiber optic. When I try to change it asks me if I want a new router or not. Since I have one already I don't know what to select. When I change the tariff do I need to ship back the old one? Should I choose a new router?

Could you please help me?

Thank you.