I believe its free incoming for both international and local calls!
I remembered I told everyone I called to call me back when THEY are free or when we have something to discuss.
I told my children specifically what time to call during the evenings before bed, so I can chat with them, so much so they did not even miss me!
And when I am done, I just put the phone into the pre-paid envelope they provided and drop it into the postbox! When I reached home, the bill is in the email giving me a breakdown of the rental plus usage costs. Sweet.