I'm having an issue where I will occasionally have my messages fail, even with full signal. The message will go grey after an attempt to send and then show an exclamation point for the fail. Sometimes it allows me to send if I go into airplane mode, which for some reason will take a long time sometimes, and then turn off air plane mode. That usually fixes the issue. I can also just try and resend and it sometimes works and sometimes doesn't. I'm afraid that if after like four times that I get the fail on the same message that I did indeed send it all those times like some people have suggested. It happens to texts that are short and long. I've tried connecting to wifi when it happens at my place, but that doesn't necessarily fix it either.
I don't know if when this is happening if I can receive phone calls, but that would probably be something I should try if I'm out with some friends when it happens.
Anyone else experienced this, or know of something that could possibly fix it?