When I was a kid, whenever someone gave me some toy or other one of the first things I would to was take it to pieces to find out how it worked. To my credit, I was usually able to put the thing back together again, although I must admit that as devices have got more complicated I don’t do as much dismantling as I used to.
And the good news is that with the rise of the internets, I don’t have to. The folks at iFixit have recorded a lovely video of a Lumia 920 being taken to bits and then, most importantly, put back together again.
I’m not advising that you should do this kind of thing for fun, but the important part for me is that that I reckon that I could probably get away with having a go. Particularly as all the breakable bits like the headphone and usb sockets are on modules that look like they can be easily removed and replaced.
Even if you have no intention of ever taking your phone to pieces I recommend watching some of the video just to bring home just how much is going on inside that smooth plastic block.