To turn on data roaming, please refer to your handset type below:
iPhone - Settings > Mobile/Cellular > Mobile Data Options > slide the button to switch on data roaming
Android - Settings > Wireless & Networks or More Networks > Mobile Networks > Tick Data Roaming to switch it on.
If these menu selections do not match your device, please see your user manual for how to switch data roaming on.
PLEASE ENSURE YOU SWITCH OFF DATA ROAMING WHEN NOT USING THE INTERNET, THIS WILL PROTECT YOUR CREDIT/DATA PACK BALANCE.