My vibrator on my iPhone is broken for a second time, and just vibrates like crazy whenever it feels like it. It needs to be replaced. Apple replaced it once about 4 months after I purchased the phone. Should I wait to have it replaced hoping that the new iPhones are released, and I might be lucky enough to get one of those? Or is there no chance apple will run out of stock with the 8gb iphone, so should I just do it ASAP?