At home we both have iPhone 6's and 2 iPads all updated with IOS 8.1.1. As of lately, I can SMS anyone with a phone number from iPhone, iPad, and Macbook Air via Messages. I text back and forth with non iMessage/Non-apple users everyday now. PROBLEM: my roommate cannot iMessage Non-Apple/Non-iMessage people through her iPad (updated to 8.1.1). When you attempt to text someone outside of iMessage, the name (with the phone number) is RED and states that "Phone Number X is not registered with iMessage". However I have no problem texting these people with my Apple devices. I have placed our devices side by side and the cloud and Message settings are identical. Anyone know what might be causing this? Being able to text non-Apple users now is very convenient.