Hi Jerry.
I would really like to help you with your problem, but before I can do that you may want to answer some of questions of mine.
First of, what do you mean with "You can't iMessage Android users"? Because if you are talking about sending iMessages, if I might call them that, to Android devices, you won't have any luck doing so, because you can only send them to other iPhones, iPods and iPads. However, you can send SMS and MMS to basically any other phone that you want to.
MY second question is, where you have read what? Because I for my part have definitely not heard about any problems regarding that topic ever before. Mostly because I don't really see the problem, but you know what I mean. Feel free to hook me up with an article or two so I can dig into it myself a little.
Until then, you may be helped with this handy article about iMessage and what it can and can't do:
Messages for iPhone, iPad, Apple Watch, and Mac - Apple Support