I bought the 10 days add on US roaming with data, text and unlimited voice. The quality of the service is terrible. I am in Florida and my phone does connect to some US provider (AT&T) but person who call me reach my answer machine 9/10. Only 1/10 of my outgoing call work. Nobody can reach me and it take me 10 try to reach someone. It is really frustrating. What can we do to get a decent quality in US with the add-on.