Phones from Vodafone are normally locked to Vodafone and would need to be unlocked first before they will work on 48.
Are you sure that this phone is unlocked?
If not then you'll need to get it unlocked first.
If it is unlocked then you should get a network connection.
If not then you may need to enable roaming/data roaming.
Once you have a network connection and calls/texts work you can follow the instructions here to configure your internet settings.
Hope this helps.