Overall, the my experience with /e/ on the Oneplus 5T has been very positive. For a beta, there seem to be very few bugs or problems with the underlying system. I’ve found that many of my needs can be addressed by various FOSS apps.
One issue that I have not been able to resolve is related to the aux/headphone jack. This may be unique to my use case. I have a substantial commute and like to use the aux/line-in connection to my car’s audio system for listening to audio books and podcasts, as well as the occasional phone call in the car via the headphone jack. For whatever reason, it seems that the volume of the audio coming from the headphone jack is capped at a substantially lower level than the old iPhone that I had been using. Because of this, I am forced to crank up the volume of my car’s audio system. Even when the phone and the car’s system are at max volume, audio is still too low for me to hear. I discovered an audio-book app called “Voice” that allows me to manually boost the audio beyond the max. This allows me to listen to material in the Voice app at an acceptable level but does nothing to affect the phone’s maximum volume output outside of that particular app.
I also experience horrendous low-frequency feedback from my car’s speakers when making phone calls via the aux input. This may be caused by the fact that my car’s volume must be cranked up to a higher than usual level in order to hear. Ultimately, it is impossible to make phone calls via the aux input for this reason.
I can also confirm that the volume is extremely low when using wired headphones connected to the headphone jack. I wasn’t able to find any settings that would let me increase the maximum volume output through the jack nor was I able to find an app that would accomplish this from a system-wide level. Does anyone have a possible solution to this? Thanks again.