My original iPhone got really banged up (long story) but still works fine, except for no wifi which is not a big deal since I plan on buying the newest iPhone this summer. Anyway like I said my phone works fine but the back is actually dented and scratched and I looked on ebay and they sell new iPhone casings with needed tools for like 50 bucks. Since my warranty is already voided (due to the phone looking so messed up) is this something anyone would recommend me doing? I am just a little weird when it comes to things looking new and besides the back metalic housing the phone looks great. How hard would it be to replace this? And is there a good chance of me permanently F'n up my phone?