I have no sympathy for this lady. iMessage is a proprietary service. There is no obligation on Apple's part whatsoever to make life easy for people who wish to move their iMessages to another platform. She could have simply used SMS if she wanted to be sure that she could change to another platform with no issues. There was no need for her to use iMessages; it was her choice to.
Does she expect all her iOS apps to work on Android, too?
SHE WAS NOT TRYING TO MOVE iMESSAGES TO ANOTHER PLATFORM. SHE WAS SIMPLY TRYING TO GET THE iMESSAGE SERVER TO RELEASE HER PHONE NUMBER SO THAT iPHONES COULD SEND AN SMS TO HER NON-iOS DEVICE.