Verizon could charge around $20 to $30 more than AT&T for subsidized iPhones, claims JP Morgan's Mark Moskowitz. The analyst observes that in order to properly support Verizon, any new iPhone model must use the CDMA networking standard, the hardware for which is more expensive than the GSM/UMTS used by all current iPhones. He adds though that while buying an iPhone could be more expensive through Verizon, the issue might be offset by better network performance.