Samsung Galaxy S3 - Text problem

[dragoongary200]

My phone recieves and sends text to every number on any carrier or phone. My friend has a galaxy note on att. He can get my texts but I can't get his. I checked to make sure I didn't have his number blocked or under spam messages by accident or something, and he wasn't. So no idea why I can't recieve his texts. I'm not blocked or anything from his phone either. So until we figure it out we've been using facebook chat. Any ideas?