Regarding:
Originally Posted by
italdesign
Q. How am I charged for voicemail calls while roaming internationally?
When your device is on:
Calls that you do not answer that are routed to the AT&T voicemail system will be charged as an international roaming incoming call to your device.
In addition, the foreign carrier's routing of that call to the AT&T voicemail system may generate an outgoing call charge from your device's location to the U.S.
These charges apply even if the caller disconnects from the voicemail system without leaving a message.
I know you said you were on AT&T, but when I saw your post it dawned on me that this may explain some mystery charges one of my roaming users generated last month. We're on T-mobile and all of her calls billed at the appropriate roaming rate ($.20/min) and all the data was free, but there were 3 1-min calls to voicemail billed at $2.99/min. She says she didn't call voicemail and I believe her. I think the scenario you mentioned is probably what happened, that she let it ring through to VM. It had me stumped until I saw your post.
I mention all this only because if you're considering picking up T-mobile service temporarily just for the free data roaming benefits (as has been suggested in other threads here on FT), you would still need careful about that potentially costly loophole.