Hi. I am having trouble sending text messages to a friend who's on another carrier. The mesage I send say they've been sent, but are never delivered. She was on some other carrier -- Sprint I think, and none of my texts ever got through. She recently ported her number to an iPhone, don't know which carrier, and the same problem persists, I need to be in touch with her. She's one of my best friends and is moving to Germany and will be posted in Afghanistan for the forseeable future. What's the deal, and is there a fix or a workaround to this very annoying problem?
Thanks!