My dh added an international plan to his cell phone, its tiered too as he has to cover siberia,auckland, New Zealand, Bejing, England, Sweeden and Denmark.
I always tell him to "talk fast". Next month its Bejing again. Last month was Siberia. I dont want to see that bill. He called me alot as I was experiencing a little medical crisis.
I dont know if the flyer talk website could help you too. Best of luck.