My phone is out of warranty and the power button up top has broken. I went to the Genius Bar, but they want $150 for a refurbished 4. I asked if it was possible to upgrade to a 4s, but that was a no. When the iPhone 5 comes out do you think replacements for the 4 will be any cheaper? If so, I'd rather wait cause $150 is a little too much. Thanks!