PIECE is a device the size of the credit card that holds any GSM, EGSM, DCS, or PCS card, allowing you to add an extra number to your existing smart device via bluetooth.
The battery can provide up to 150 hours stand by time.
Put your other number SIM card into PIECE and using Bluetooth connect to your phone. Both numbers can now be used on your smartphone.
Non-cellular smart device can be turned into your cell phone.
The project campaign is on the Kickstarter and already reached its funding goal of $35.000 CAD. The early bird prices are gone, but you can still get it for $70 CAD. An estimated delivery is on October of 2015.