You can use Ringo while roaming as long as you use a local SIM from that country.
So, for instance, when you travel to the UK and get a local UK number during your visit there, you need not create a new Ringo account, all you need to do is add the new number to your existing Ringo account. Click here to find out how you can add another number to your Ringo account.
Alternatively, you also use the WiFi Roaming feature if its supported in the country to which you are traveling. Click here to check which countries support WiFi.
Note: If you use your existing number and not a local number, while you are abro