I'm a fairly slim guy, so I don't know if this has to do with my build or not, but in some of my suits, my iPhone which is slightly heavy pulls down on my jacket ever so slightly that it feels uneven on one side. It probably isn't very noticeable to others, but to me it is.
Is there a particular way that suit jackets are constructed to counter weight in one side, when something is in one pocket? Because I swear a couple of my jackets work just fine with the iPhone in there, and others it feels lopsided. Not sure if it has something to do with the canvasing.
I find that it's sometimes worse in my dress pants. Especially if my phone starts falling diagonally within the pocket so that it shows even more.