ONE BIG EDIT: Nothing, nothing , (how can I emphasize this?!?) nothing has broken off! Maybe I should post pics?
And I didn't ask anyone to point fingers. I'm simply wondering if anyone has anything helpful (ideas) to say about tightening the cover to the phone. It's my fault but I didn't ask you what you think of it. Suddenly everyone became a f&cking judge. This is a "helpful" forum after all, right? And yes, I'm pissed about Nokia's design. They should have thought of the phone maybe falling or... there's a billion other scenarios that could loosen the cover. They should have either made it tight like the Nokia Lumia 820 or stick the headphone jack into the phone like the Nokia Lumia 520. Sometimes middle ground is good but not this time...
Nothing has to break off for something to not work properly. Since such a thing doesn't really happen/we don't really see it around here, theres a good chance you're breaking new ground here.
I'd still get a replacement cover, that'll probably be easiest. Perhaps you can examine the snaps that keep the cover on, maybe they're loose, or broken off entirely.
Billion... the only thing that will really loosen the cover is use. You "used" it a lot, I'd expect heavy use to be just a few times a day at most, but hey.
(I guess somewhere out there, someone is complaining how the 520 doesn't have the swappable headphone jack the 620 has after repeatedly jamming a paper clip in there, and talking about how its a design flaw.)
And the Nokia Lumia 820 is designed for people with tension, huh? It snaps on like a charm and won't come off.
It's a flawed design and get over it.
And why are diagnosing my tension levels to "abnormal"? What are you a doctor?
Refer to my answer below.
I can't speak for the 820, i haven't heard it being significantly tighter or not.
I'm not diagnosing your tension levels, I'm diagnosing your habit as abnormal. Your tension or stress or whatever isn't my concern, I'm just saying that constantly snapping the cover on and off as much as you do isn't exactly normal, and unfortunately the headphone jack happened to collateral damage.