OK thanx to all for answering my q's. I was of the impression that my pre-paid phone would not work at all in Thailand, either by way of putting it on GR or by buying and using a thai simcard. BUT ... now I know differently. I could have saved a lot of money in phone calls to home by taking it and buying a thai sim card (which by all accounts looks like a cheaper way than using GR anyway!)

So ... will add that to the "next time" list - take old mobile phone!!!

Kitty