You can't really avoid it in any easy way. If you could, the field of statistics would get a decent amount simpler. The only way to deal with the bias is with a survey pulled from random people, which you can't really do easily here.

But this one will have a lot of bias, all the same.

Reducing bias is tricky.

You want engagement from a. Mobile users who b. Use headphones c. With their phone, and the type of headphone connection is the end goal.

"How often do you use headphones with your phone, and are they wired/wireless" is clonky, but gets everything out there without too much leading. People more awake than me can help more.

*I use wired $9 shitty earbuds, daily. The Bluetooth ones are nice, but I lose them and the battery life sucks, and it's a hassle.

You know I think the way you eliminate that is less by relying on the frequency of use, and more by relying on the merits of the argument being had itself. A good part of this is gonna be calculated on whether or not the tradeoff of having an aux jack is worth it. For the consumer, this is needlessly stupid and there are like no phones now that have one, you have a limited selection and that sucks, but in terms of the actual core technology I really can't see why you wouldn't have one. The idea that it wastes the 2cm^3^ of space is kind of a poor argument, imo, when we've been switching from palm sized phones with bezels and home buttons, to phones that now stick out of my sweatpants pockets and have hole punch cameras and like four cameras on the back and somehow have less features. None of the market makes a lick of sense, right now, it all seems like manufactured demand and monopoly to me.