There's a bug going on in Beta 3 that if you try to send a text message to another person not using an iPhone, it will fail. iMessage WILL work, but not TEXT message. This is limited to the Sprint network; other networks work fine. I found a temporary fix for those looking for one: Sending a group message WILL WORK. So, instead of sending the one person a separate text message, send a group MMS to yourself, and the person without the iPhone you're texting. It should go through. Hope I helped you guys out.