Thanks to an ongoing issue with the way Apple built its iMessage platform, users who switch away from an iPhone to an Android phone or any other cell phone are faced with a huge problem: once they bail on the iPhone, they often can’t receive text messages from contacts who are still using iPhones. This is because Apple’s system still sees them as iMessage users, and it tries to deliver messages sent using Apple’s Messages app as iMessages. To make matters even worse, the iPhone users who send those messages see their status as “delivered” even though they are not being received.
Thankfully, there are ways to avoid this annoying bug if you’re planning to make the switch from iOS to another platform.
Read more here: Boy Genius Report