PrePaidGSM.net Forum (Archived) - View Single Post - Gt-sim ?

Klaus Wegener · 30-11-2005, 20:53

Hello,

yes, incoming calls are free for me in Germany. I think it works like this: when subscribing to GT-SIM, you give your address, which is your home-country. In this country, incoming calls are free.

Question is, which countries can be chosen? For example, my girl-friend is in the Philippines. If she also subscribes to GT-SIM, I will call an English number, and she answers the call, and wont be charged? This would be quite cheap for me, as calling an English (mobile) number, for me is cheaper than calling a philippine mobile number (and the quality should be better).

I never tried to call myself, but regarding the question, what happens if you call a GT-SIM number: you are charged from the moment you call, even when the person does not answer. I don't know, what the story behind this could be. But a guess is, that they do this, to avoid the subscriber working with callback-services like Enlinea.

Or it has real technical reason. As I heard from customer care, GT-SIM has (belong others?) two switches: one at MCI in London, one at MCI in Hamburg. The german customers are routed via the Switch in Hamburg, the British customers are routed via the switch in London. The switch in Hamburg is not ready for CLI yet, means, a German subscriber will never see the number of a caller. An SS7-upgrade is planned for February of next year.

I don't know yet, which switches are used for other customers, outside UK and Germany. Do you see number of an incoming caller? (As here are subscriber from Poland, Italy and other countries).

Concerning the number-range, GT-SIM has agreements with Manx Telecom, O2 UK and Orange UK. They have number ranges from these operators. Seems that currently, they only use Manx. As far as I understood, the issue with GT is, that they are terminating the calls themselves (therefore "Global Termination") and they can offer reasonable prices therefore. In my eyes, this means that calls to English subscribers are terminated in MCI London and calls to German subscribers in MCI Hamburg (and not in Manx Telecom). But I am not 100% sure, if I understood this correctly.

Bye for now and regards,
Klaus

	(#66)
Klaus Wegener (Offline) Junior Member Amateur Member Posts: 28 Join Date: 18 Oct 2005 Country:	30-11-2005, 20:53 Hello, yes, incoming calls are free for me in Germany. I think it works like this: when subscribing to GT-SIM, you give your address, which is your home-country. In this country, incoming calls are free. Question is, which countries can be chosen? For example, my girl-friend is in the Philippines. If she also subscribes to GT-SIM, I will call an English number, and she answers the call, and wont be charged? This would be quite cheap for me, as calling an English (mobile) number, for me is cheaper than calling a philippine mobile number (and the quality should be better). I never tried to call myself, but regarding the question, what happens if you call a GT-SIM number: you are charged from the moment you call, even when the person does not answer. I don't know, what the story behind this could be. But a guess is, that they do this, to avoid the subscriber working with callback-services like Enlinea. Or it has real technical reason. As I heard from customer care, GT-SIM has (belong others?) two switches: one at MCI in London, one at MCI in Hamburg. The german customers are routed via the Switch in Hamburg, the British customers are routed via the switch in London. The switch in Hamburg is not ready for CLI yet, means, a German subscriber will never see the number of a caller. An SS7-upgrade is planned for February of next year. I don't know yet, which switches are used for other customers, outside UK and Germany. Do you see number of an incoming caller? (As here are subscriber from Poland, Italy and other countries). Concerning the number-range, GT-SIM has agreements with Manx Telecom, O2 UK and Orange UK. They have number ranges from these operators. Seems that currently, they only use Manx. As far as I understood, the issue with GT is, that they are terminating the calls themselves (therefore "Global Termination") and they can offer reasonable prices therefore. In my eyes, this means that calls to English subscribers are terminated in MCI London and calls to German subscribers in MCI Hamburg (and not in Manx Telecom). But I am not 100% sure, if I understood this correctly. Bye for now and regards, Klaus