My apologies if the topic has been posted already.
I live in USA and my career is ATT, Both my wife and I have Iphone 4 updated to IOS 5. We use Imessage to communicate with my brother and my sister in law in Italy. They both have Iphone 4 updated to IOS 5. We all have Imessage on. We don't send International sms to any other phone or iphone.
98% of the conversations are sent and received as Imessage (blue). Few of them start as an Imessage (blue) and, when sent, became International SMS (green).. It happens both in wi-fi or 3G. During the same conversation or different conversation. No matter if a pic is attached or just text. ATT is charging me $ for the international texting and this drives me crazy. Neither ATT nor Apple is providing an explanation. If I cannot find a solution I'll be forced to use third part apps (viber) to send international free sms from iphone to iphone
Thanks in advance for your help and happy holidays to all!