Hello,
I have a GT-SIM card since two weeks, and it works pretty well. I used it in several European countries. Outgoing calls are working reliable and they are of course pretty cheap. Although, last week I made several calls, which did not appear in my web-login till now. Strange. Outgoing SMS are working very well (not like with Riiing, trying to send, does not work, charged nevertheless). The price for outgoing SMS is really great, I do like SMS again since I have my GT-SIM
The phone can be used again as Two-Way-Pager, even when travelling internationally, without getting poor. WAP over GPRS is working fine - but unfortunately, GPRS-roaming seems only to be available in very few countries. Only for incoming calls, I like more my Riiing. But all in all, good deal, this GT-SIM
Due to customer care, they have big plans for the future (additonal roaming partners, listening to voice-mail online).
Cheers,
Klaus