You can but there's more to it then just saying yes. What type of connection do you have? If NBN, what type of NBN? Do you use your landline?
Yes......BUT..there are few factors that might affect that answer. The quickest way is to get a better wifi router and piggy back to the sagem modem (careful with double NAT). As per @SamSam please let the community know of your setup and requirements.