Personal callback server redux

joeko2202 · **Personal callback server redux -** 22-01-2009, 16:40

Ok, so people have told me I have too much time on my hands...

I'm working on a project to try to get inexpensive cell phone calling in Europe, and working on my own callback server (using FreeSWITCH, a REST web service, and some software on the phone).

Where I'm hitting a snag is the VoIP provider -> mobile phone. There's two routes I can go, either get a local SIM for each region I'll be in (which raises a question, how "tight" are roaming areas in Europe? For example, if I had an Italian SIM, and rode across the border to Austria, would I find that my costs would increase due to roaming?).

The other option is the international SIMs offered and getting a VoIP termination in Europe somewhere. The question there comes from looking at the comparison chart. I'm assuming the prefixes are all mobile prefixes (e.g. +4236 versus +423), since this impacts my magical low cost routing calculator I've got chugging along.

So, I'm looking for some practical experience in this. I believe the local SIM would be the cheapest route, but also the most inconvienent. The international SIM is easier, but the costs may be a problem. Any thoughts?

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joeko2202 (Offline) Junior Member Newbie Posts: 4 Join Date: 22 Jan 2009 Country:	Personal callback server redux - 22-01-2009, 16:40 Ok, so people have told me I have too much time on my hands... I'm working on a project to try to get inexpensive cell phone calling in Europe, and working on my own callback server (using FreeSWITCH, a REST web service, and some software on the phone). Where I'm hitting a snag is the VoIP provider -> mobile phone. There's two routes I can go, either get a local SIM for each region I'll be in (which raises a question, how "tight" are roaming areas in Europe? For example, if I had an Italian SIM, and rode across the border to Austria, would I find that my costs would increase due to roaming?). The other option is the international SIMs offered and getting a VoIP termination in Europe somewhere. The question there comes from looking at the comparison chart. I'm assuming the prefixes are all mobile prefixes (e.g. +4236 versus +423), since this impacts my magical low cost routing calculator I've got chugging along. So, I'm looking for some practical experience in this. I believe the local SIM would be the cheapest route, but also the most inconvienent. The international SIM is easier, but the costs may be a problem. Any thoughts?