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caller paid roaming

Caller paid roaming as protection against phone SPAM
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I'm really annoyed with paying for SPAM or erroneous calls when I'm abroad. I'd suggest OPTIONAL (activated by the phone owner) caller paid roaming. It should work as follows: When someone calls me and I'm abroad, the caller gets a voice message: "The subscriber is currently using roaming, the connection may be completed at charge $xxx/minute, dial 6853 (randomly generated code) to connect anyway or hang up". The voice message and randomly generated code should protect the GSM provider against being sued by the caller, who could disagree to pay for the call claiming that "he/she didn't understand the message and didn't know, that the connection will be more expensive".
puciek, Aug 27 2004

How the HRL works http://www.sans.org/rr/papers/68/166.pdf
Caution - PDF file [Klaatu, Oct 17 2004]

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       Good idea in many ways. However, change the message to "The person you are calling is in a foreign country - now is the best time to burgle their house, steal their car etc".
dobtabulous, Aug 27 2004

       A major problem with this idea is that if you call me on my cell phone, it's down to my operator to track me down to put the call through.   

       MY operator won't know how much your operator will charge you for the call, so my operator can't advise you how much it will cost you to make the call.   

       YOUR operator has no business knowing where in the world I am, so it can't advise how much it will charge you.   

       I'm with you on principle, but I can't see how it would work.
irishjack, Aug 27 2004

       Why not just use a dual NAM and not have any roaming charges at all? Also, roamer plus® used to (back in the dark ages of the 80's) have a number that could be called to have the service be local for you and a toll call for the caller. I still use roamer plus to make calls from deactivated mobile phones when I am on the road.   

       //YOUR operator has no business knowing where in the world I am// did you know that in the HRL (Home Location Registry) that I can pinpoint you to the tower that you are talking from and you would never know? Child's play!
Klaatu, Aug 27 2004


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