Yes you can use your own modem. Please check the minimum specifications required and ensure your modem is compliant. Please note that Wave is constantly making efforts to provide faster speeds. At times we may automatically upgrade the speed under your plan. If your modem is unable to handle the enhanced speeds, you may need to procure a new one. Moreover, technology obsolescence is a fact of our times. Changes  and enhancements taking place around us may also render the modem obsolete, requiring replacement.