[ygeffens]

Snidely, absolutely right !

Because of all the troubles with these international sims, I moved to buying local sims (most of the time in advance of my departure), I set up forwarding, and use Jajah for making calls myself. Before I leave I ask Jajah to change my mobile number to the one I'll be using. I allways have internet access where I am, so, cheap enough for me, and no troubles not being able to receive a call because of stupid non-working roaming agreements of these international sims.

That's how I do it now.
Just sharing...

EDIT for typo