1.If your phone has a mobile data plan you can use that to connect to the internet.

2.Tap on 'Settings'. 

3.Tap on ‘Network and Internet'. 

4.Tap on Mobile network .

5.Switch mobile data from 'Off' to 'On' by tapping on the 'toggle' icon.  Note: When you are not using the Internet, remember to switch your Mobile Data from 'On' to 'Off'.

6.Your phone may display an icon showing mobile data is on.  Note: The icon may vary depending on which phone and type of connection you have.