Click the 'Send' button on the bottom of the screen

Select the 'Mobile Top Up' option

Click 'Top up my mobile number' or 'Top up a friend'

For 'Top up my mobile number', input your information

For 'Top up a friend', choose from contacts or manually add the phone number

Add the Name, this is optional

Click the 'Continue' button

Select the amount for Top Up

Click the 'Review your top up' button

If the information is correct, select the 'Pay now' button