I've had my phone for six months. Nothing has changed. I was able to send pictures to my husband yesterday, and today all I get is a red exclamation point. I tried sending to my sister as well, and I can't send to her either.
I've tried restarting my phone, disconnecting from wi-fi, making sure SMS is enabled when iMessage is not available, and I got the newest software update. Nothing works.
What changed since yesterday afternoon??