[quote flu]Unfortunately, the phones had my personal sim card BUT they were running a custom build without android market on them… In other words, not able to push custom software on it. Otherwise, this would have been easy.[/quote]You don’t need Android market for it. The ‘target’ phone I tested was not a smart phone. It was an old Samsung that has GPRS. So long as the phone obeys the standard phone protocols.. it should be locatable. No push needed.
The locator was commanded from a smart phone though.. but that is the one you would have to ‘locate’ them with.