Found a huge feature!

The app let you forward all your calls into it, to work on wifi/3G/4g. Im using it when I travel abroad, I can switch my SIM and keep my original number anywhere in the world! I can also login using a friends device and make and receive calls using my number, when my battery is dead. Thats a HUGE bonus, well done!

Erzom about Call Recorder - Incoming and outgoing call recorder