Your iPhone messages could be green for two reasons: you're texting Android users, or you're not connected to Wi-Fi.

Chances are if you've ever owned or used an iPhone, you're familiar with your outgoing text messages appearing in blue bubbles. Sometimes. Other times, though, they'll show as green instead. So what's ...

If you're an iPhone owner, you might be familiar with this experience. You're having a back-and-forth conversation with your friend over iMessage, when suddenly there's a lull and your blue bubbles ...