Apparently once you leave Apple's iOS, your text messages may be lost, according to reports, but the problem has been around for years.
A former iPhone user filed a class-action suit against Apple earlier this week claiming this problem violates California's unfair competition law and impedes wireless carriers, according to the Re/Code, and Apple has since acknowledged the problem and is now proposing a fix. That's great considering the problem has been around since 2011, and Apple is just now getting to it. The problem is that it's been made worse by a recent server bug. Apple still has to send a software fix in the next iOS update.
iMessage, Apple's messaging system, reroutes the messages sent to another Apple device through its servers rather than wireless carriers to bypass charges. Basically in order for it to work, it needs an associated phone number -- but the problems begin when an iPhone user keeps his or her old number but moves to an Android phone. Although it's far too complicated for us to understand, and Apple isn't casting any light onto the problem it's barely acknowledged, but once a user moves to a different platform the messages are sucked into Apple's cloud and never seen again.