Apple has released an updated iPhone firmware for Verizon iPhones only -- despite the fact that this model isn't even available yet, reports MacRumors. The company demonstrated iPhone 4s running iOS 4.2.5 at the public launch earlier this month, but this is the first general release of software specifically for the Verizon iPhone. The download does not include any notes about what, if any, changes have been made since the 4.2.5 version, and speculation continues on when Apple will release iOS 4.3, currently at Beta 2, for both AT&T and Verizon iPhones.