HTC One sound is not working with speaker or headphones
There have been several reports and issues that are popping up with sound and speaker problems on the HTC One and other HTC devices. With any smartphone device there will be sound issues no matter what device you own. Some issues that you may be encountering include no sound with headphones speaker, YouTube, games and the music player. Thankfully the fixes are pretty similar across the board, below are some simple and tested steps and fixes that may resolve the no sound and speaker issue.
This one is pretty simple but make sure the silent mode isn’t on and the sound is turned up, I know that I have been guilty of that a few times.
This solution seems to be quite successful across the board, so what you want to do is insert your headphones into the headphone jack and then pull them back out. You want to repeat this for about 30 seconds. This is done as sometimes the phone thinks it is in headphone mode and this should eliminate the glitch.
Similar to the above step you want to clean the headphone jack with a cotton wool bud or a toothbrush, this should remove any dust or grime that has accumulated in there. So if there was a good amount of dirt it may be blocking that connectors resulting in a bad connection.
Also there may be a glitch within the device itself so try a restart by going into the settings app.
Another step that seems to be quite successful is going into settings and turning off and on or disabling the beats audio.
If any of these steps or solutions have fixed your no sound or speaker issue then please share what did as it really does help. Thanks!