Postpaid, by credit card. It's debited monthly, no debit if no transactions (so minimum is zero). It's billed in Euros from Gibraltar.

I think the business plan involves a monthly subscription, I don't think they're promoting that yet.

Thanks RTuesday.

How does the SIM work? I like the idea of a postpaid SIM, if it works well. I currently own a Riiing SIM that always worked flawlessly with my old Nokia 8210.

I'm no expert on these things, just a user. I dial the number, it calls me back and completes the call. Somebody mentioned it does it all via SMS internally.

I haven't been a heavy user of it (apart from SMS) because I've been in the US for a while where it's a bit expensive to use for voice. However, it has worked fine whenever I've needed it (with the one exception of roaming in Mexico, which is very new and unreliable, a Manx Telecom problem).

The only phones I've tried it on are both very basic - Siemens A60, A56.

What I wrote is the instructions I was given by GT-SIM customer service (Markus Hauschild) to get my Ericsson T39 to be able to use their service. I do not know anything about a Callkey service.

As far as the service goes, I was on London and Prague last week and had great reception and had no problems making calls in either location. I roamed on O2, Orange and another in London and T-Mobile and ET-CK while in Prague. The couple of tests I made in the US have also worked well, but as is mentioned before, the cost of calls while in the US is a little expensive.

As for the payment of the service when you visit the GT-SIM website, you can choose a pre-paid or postpaid account. I also chose the postpaid as I did not want to worry about trying to get a re-charge at anytime.

So far I like the service. I was in Brugge about three years ago and used a different plan that just plain did not work. It was on a phone that only had 900mHz reception, but I always had problems finding service.

--
Jeff