PrePaidGSM.net Forum (Archived)

Showing results 1 to 2 of 2 Search: Posts Made By: torput

Forum: Callback, VoIP, Satellite and all other technologies

14-04-2008, 12:24

Replies: 4

How do sim4travel, maxroam etc. work technically?

Views: 3,122

Posted By torput

Thanks! So the callback system probably...

Thanks!

So the callback system probably calls the MSISDN of the subscription and not the GSM roaming number. And some users with specific calling patterns can cause losses to these companies.

Forum: Callback, VoIP, Satellite and all other technologies

14-04-2008, 11:51

Replies: 4

How do sim4travel, maxroam etc. work technically?

Views: 3,122

Posted By torput

How do sim4travel, maxroam etc. work technically?

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...

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