Smart Phones should last at least two years, unfortunately the rubber bumpers on your phone's case rarely do. Once the rubber bumpers fall out your phone is way more likely to break from a drop. A couple $ worth of Sugru can restore utility to a variety of phone cases.
Put your phone in the broken case and push in some Sugru. Pull your phone out and let the Sugru set over night. Viola! It's better than new.
This was completed at the Hoboken Makerbar as part of the Sugru Build Night.