I have two iPhones, one I use for work and the other for personal. They each have their own Apple ID's for iCloud and pictures and stuff, but I used to be able to sign into my personal iMessage and FaceTime on my work phone, this way it didn't matter what phone I had on my I would always get my messages. However since upgrading to iOS 11 I have not been able to change the FaceTime and iMessage account to my personal one. Has apple removed this feature? Is it a glitch? Or is there a workaround? Thanks.