I did a quick search.
The Motorola i730 is an iDEN phone and only works on the iDEN networks like the Telus (formerly Clearnet) Mike network or Nextel in the US. Bell might have an IDEN network as well, but I'm not sure.
It's not GSM and even though I know very little about iDEN networks, I doubt an iDEN phone will work on a GSM network, regardless of whether or not it uses a SIM.
October 14, 2008
I have a motorola tracfone from the US. (prepaid wireless network with a lot of flexibility but insane rates). It is called a motorola C139 GSM phone. In the phone I can select 850/1900 MHz. I guess if it is GSM, it should work even though it is foreign?
Tracfones do not work with Speak Out sims. Tracfone's firmware is hardwired, and they can not be unlocked.