I heard a horror story the other day about someone who was traveling for an extended period on a ship. His phone was from Europe. In LA, he placed one called. For a month or so, people who called his phone got voicemail. Because he was last seen by the network as being in LA, all of his voicemail calls incurred roaming charges and he ended up with a $3000 voicemail bill. He argued, but they did not refund it.
I checked the T-Mobile web site and sure enough, after a bit of digging, I found this (link):
Unless you switch your device off or activate Unconditional Call Forwarding on your device, you will be billed for calls delivered to your voice mail box while you are roaming internationally.The odd thing is, I'm quite sure he didn't have his phone on during the travel period. He said that they had told him that even without the phone on the call was still routed through LA. Does anyone else have any experience with this?