I believe the answer is very simple --- you can use anybodies modem as long as meets homologation requirements for that country.
Since US does not have many requirements you need to look for philipiness standard and make assesment. As I recall Vic got 2x4 with Rj11 jack attached approved to Fcc part 68!!!! Jan Purwin Always go to the source internet is wonderfull to find the thing you need.
