I remember I used to have the same problem years ago, when travelling on a mothly basis to Sweden. I am italian and my SIM provider granted me good fares, as long as I was staying in Italy, but...roaming fares were killing !
Until I discovered the so-called "callback" procedure. At a very low cost, I coulc make a call to a remote foreign computer. Notice : I let the phone ring and then I closed the conversation. The remote pc traced my call and " called me back " in two seconds' time.. No expense at all ! When I answered the call, I heard only the free-line signal, so that I could dial any call I wished to and talked normally. That is the callback procedure.
I am confident that lots of compnies offer the very same service,and I advice you to make a try and compare the various fares. When I did the same test, I realized that callback was 49% lower than prepaid SIM cards. Furthermore, you are chargend only when you use it. In Italy a SIM prepaid card costs about 10 euros _ with the same sum you could have one month of callback procedurized calls !
I hope having been of help.
Riccardo ( email@example.com)
I live in Vermont and have cell service with UNICEL. My phone is a GSM unlocked Motorazr v3i. It is a great plan for me: unlimited calling but only in my region. In August I will be traveling to New York, and then Canada. I can switch my plan to cover these locations with a plan that counts minutes, but I lose my unlimited calling until the next billing cycle, which will be more than half the month. I would like to preserve my calling plan so I can use it upon return because I am a big user, so .. .
I was thinking a prepaid SIM card would be the best solution while I am traveling. Any ideas on what card to buy and from where? I have no experience with SIM cards so any advice is greatly welcome!