So, with my two 7550's from ebay... I'm happy with. I believe they are fantastic handhelds. However one came with a remote handset, which I was hoping to use. But when installed on either radio, the mic would work correctly, but the speaker would not. I assume it's because my freebee from ebay just had a bad speaker, because it didn't work on either radio. No sound from it when attaching to the radio either. Before I pony up for a new unit, is there a setting for that device I'm missing?