[melvinram]

If this was the case, they should have communicated it.

As an iPhone 4 user, I chose not to upgrade to iPhone 5 when my contract expired because I feel like whatever gets released this coming year (5S/6) might not be compatible with iPhone 5 software wise.

[sigzero]

They did communicate it. They have communicated it for a couple years now.

[melvinram]

It wasn't part of the announcement.

[bruceboughton]

They did.