Hi @Bellbirdweb,
Still digging to find more info on this, haven't given up yet....
Have a read of this link, in particular point 10 of the " important things you should know"
http://www.wirelesscommunications.com.au/pdfs/TMS_Customer_Pricing_Brochure__300305.pdf
It may just be possible....fingers crossed. Pick up the Iridium tomorrow, so will know for sure soon.
Jas
@Holden_man, point 10 says if you have a Telstra Satellite SIM card, and put it in a GSM handset, you will be charged at satellite rates.
I'm still skeptical about putting a standard SIM into a satellite phone, but as I say, interested to see