are those that are provided by the Sale of Goods act, which means that the phone has to be fit for purpose. If it develops a fault, your recourse is to the retailer who sold you the phone - not to the network provider. Retailers may want to send the phone for repair, and that may mean it has to go to the manufacturer. It will be covered against faulty manufacture under the manufacturer's warranty, but that is a something else, and doesn't come under the protection you're afforded by consumer law.
The shop where you bought the phone is not obliged to lend you one whilst repairs are carried out, although they may do so - it's their decision entirely. Vodafone is your network provider, and has no liability for the phone whatsoever.