These mobile phones are unlocked to the main networks , but as Paddybloggit said above , you can only use one sim card at a a time .
The sim cards will not work simultaneusly .
We don't believe that these dual sim phones are suitable for busy lifestyles , and personally , we would not recommend one .
We bought one in China , and of course it is a generic model and the touchscreen is not very sensitive .
But in general , the phone does everything it is advertised to do .