Heads up to anyone security-minded who's upgrading to iOS 27. I just did, and I couldn't enable iMessage afterwards. It told me that I need to sign into the same Apple Account because I use Contact Key Verification. Must be a bug, because I turned off CKV and then I could enable iMessage. CKV turned itself back on and all is well, but that was slightly annoying. #Apple #iOS27 #iPadOS27 #iMessage #iPhone #iPad #iOS #iPadOS #security #privacy #ContactKeyVerification