Russian company ELARI has released the CardPhone and it comes with an interesting set of features. The super slim 42 gram CardPhone can be used as a standalone mobile device or it can be used as a supplement to a traditional smartphone. The ELARI CardPhone can sync with any smartphone running iOS or Android through Bluetooth. The device has its own micro-Sim slot and space for 500 contacts. If the smartphone runs out of battery, you can use the CardPhone or when traveling it is also a great device to plug a local Sim card into. Would you use the ELARIS CardPhone? You can buy it now from colette for $120.