Anyone else experiencing this problem? I haven't upgraded my device to the latest iOS due to bugs and size and other reasons. I'm currently running 7.1.2. With that being said, my girlfriend updated her phone to the latest iOS, now she cannot send me iMessages. I'm able to send them to her, but she cannot reply without getting an error message. Am I the only one experiencing this? Is this a way of Apple forcing me to update my iOS? Can anyone vouch for this or am I the only one?