ghostrider72

Basically you forward all your incoming calls to the Piranha Us number, then switch off the phone, take the sim and swap it with the Piranha and travel with this setup. By the way maximum flexibility would be obtained using a dual sim phone. And don't forget that whenever you go, you always need an international backup sim. The Piranha can be your primary, another for backup can be an Estonian one like the excellent Airbalticcard.