I plan to use these for my daily 4. Great sound quality for the price Personally love and feel very comfortable when wear this waist trainer. It will most definitely hold any normal phone with ease I have it on my motorcycle. And one other thing, I get complaints on theses shoes all the time because they have "sparkle" stones on them which makes you feel a bit dressed up in them. If you have any concerns, buy the corset and test it with a magnet. So, be aware that although they are low (about 2") they dont have enough padding to be supportive for more than a few hours in my opinion. This is not a SOLID feeling full up stereo that you are most likely imagining will be like your previous ones. I have been using the slightly cheaper model of this version from Belkin that doesnt have quite as much in the joules rating, and it has worked flawlessly since Dec 2017. Had the typical problem where the port on my bandsaw was 5" and couldnt figure out how to hook it up.