Why are my texts coming through under a different contact that's +11(my number)?
I'm texting with someone on a Samsung Galaxy S3, don't know the OS details unfortunately, but I have an iPhone 4S running iOS 7.1.2. We've texted for quite a while, but suddenly today, when I sent them a text, they received it in a new conversation from a new number not in their contacts, which was my number, standard xxx-xxx-xxxx format, with +11 in front of it. All texts I send them are coming in through that number now, but it appears from screenshots that some I send aren't going through at all, and some of theirs aren't sending to me as well. What could be happening, and is there any way to fix it?