When i bought my 3g back in october i bought a pack of 6 cases from ebay for 6 bucks. Wow, what a bad idea, turns out that my case has been the reason my screen keeps going black and i cant end the call or anything, i posted a thread before and people said it was my proximity sensor, guess not, i ordered a new case that doesnt cover the sensors on the top. turns out cheap isnt better..