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(#1)
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Junior Member
Newbie
Posts: 2
Join Date: 14 Apr 2008
Country:
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How do sim4travel, maxroam etc. work technically? -
14-04-2008, 11:51
What's the catch with all these "receive calls for free while roaming" SIM cards?
In other words, could someone please explain technically how they work. I know GSM techonlogy pretty well and there is something either fishy or very clever in these services. Somehow it utilizes SIM toolkit + GSM roaming number. |
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