I'm looking for opinions; I'm new at this, so I've only owned one radio. I was somewhat surprised when using the headphones that there was no sidetone in phone mode. I used to fly many years ago and all aircraft had sidetone in the audio system so the user could hear himself when speaking and using headphones. In a loud and noisy environment, it's amazing how difficult it can be to speak when you can't hear any of your own words. That's why deaf people have speech issues. Question: How many of you out there have sidetone built into your radios? Is this something in newer radios, or is this not available at all? Thanks.