Apple's MobileMe service would be going free, MacRumors uncovered evidence in the form of a new private framework known as AppleAccounts.framework that includes a series of device-specific error messages referring to free MobileMe accounts. In particular, the error messages include alerts regarding having reached "the maximum number of free accounts" for a given device and certain devices not being "qualified for free MobileMe service".
Meanwhile, an error message in another part of iOS suggests that free accounts may be used for features other than email, as an error message specifically restricts certain Apple IDs from being used with MobileMe Mail:
"This Apple ID cann't be used for MobileMe Mail, but you can use it for other MobileMe services." Other MobileMe iPhone services include Find My iPhone, iDisk, Contact/Calendar/Safari/Notes over-the-air sync, and Photo Galleries.