Photos showing an antenna band claiming to be for a next-generation iPhone have been published online. The photos, posted by 9to5Mac, show the part in question resting in between matching parts from both GSM and CDMA iPhone 4 units. The new part appears to be a mix of the two, sporting antenna breaks—black lines—in the same places as the CDMA iPhone antenna band, but also having a SIM slot in a position similar to that of the GSM model.…