Let me apologize up front if this has been addressed before- I am new to the forum and phone!! There are certain numbers in my contacts that don't receive my messages; other's do. I have been able to text these individuals in the past but all of a sudden my messages aren't received. they are sent on my end (or at least I press send). I'm not sure what the problem is- but one of them is my boss and we have been able to text with no issues then all of a sudden he thinks I'm not answering his texts when in fact I received his text and replied back the information he needed but he didn't get the reply. I've sent several "test" texts and they just aren't going through; I can receive from him but can't send back. But I can text my sister perfectly. I'm about to pull my hair out- can someone help!