*Roaming internationally shouldn't be expensive. We offer great rates on both outgoing calls and incoming calls (except in the Netherlands) when you are abroad.
Go into Settings icon choose Phone > SIM Application
Locate the SIM Tool Kit/Vectone Services icon in your apps tray
Select Manual and then Overseas to enable roaming or In the Portugal to disable roaming
(You may need to confirm.)
The service will appear within 20-40 seconds. Once you have got the signal you can start using the roaming services.