So the thing is that I dropped my Iphone, and the lower button of the volume control won't 'click' anymore. This has made the button really sensitive and the volume level easily decreases unintentionally.
I found instructions on how to open the back casing on the phone, and managed to get the antenna cover off (the black thing). Getting the aluminium casing off proved to be more difficult, as I wasn't able to lift it enough to fit a credit card between the cover and the main body. I ordered these opening tools
http://ucables.com/iphone-c2488 (I'll need the plastic things) and I thought I might give it another try when they arrive. They should be more convenient for getting the aluminium casing off than a credit card

I don't really have any experience fixing phones (or anything else for that matter), but I recon repairing the button should be one of the easiest things to repair on the phone. If anyone else has repaired anything on their phone or even opened it, I would really appreciate comments on if it's worth the risk or if the repair can even be done. I just bought a good plastic case for the phone and maybe I'll just have to live with the broken button and use hope the case will protect it from further damage (I really should not be dropping it in the first place)..
On a side note, when I dropped the phone the ... vibrating thing... (English is not my first language) didn't work anymore. I switched it off for a couple of days and now it seems to have sprung to life again. Weird..