Go Roam works automatically when you arrive in a Go Roam destination, as long as data roaming is switched on in your device's settings and you have a compatible device with the latest software downloaded. If you’re a Pay As You Go customer, you’ll need to have activated your SIM and made a chargeable event - such as making a call, sending a text or getting online - in the UK first.
When you arrive in your roaming destination, you’ll receive a text confirming the roaming charges costs in that country. To check out the standard international roaming charges for the country you’re visiting, click the ‘Roaming Charges’ link and choose your destination.
Don't forget that when you're calling or texting back to the UK, you'll need to replace the first 0 in the number you're calling or texting with +44.