Vodafone offers just one ADSL/VDSL broadband plan. The plan comes with unlimited data. Their plans feature maximum download and upload speeds. Meaning your internet speed will depend on several factors. These include your distance from the exchange, the condition of your copper wiring, noise on the copper line and line attenuation.
BYO modem or get a new modem from Vodafone for $4 per month (12 month contract applies).