iPhone

For iPhone (iOS11) and below Internet configuration steps are as below:          
Settings > Cellular > Cellular Data Options > Mobile Data Network  > APN: vodafoneweb
 
For iPhone with version (iOS12) and above Internet configuration steps are as below:
                       
Settings > Mobile Data > Mobile Data Network > APN : vodafoneweb

To check the version of operating system your iPhone is using, follow the steps below:
 
Settings  > General > About > Software Version