What does red circle with x mean next to sent text?

[Carol Williams]

What does red circle with x mean on sent text?

 

[SoccerRef12]

I think it means it wasn't sent. Make sure you have data enabled.

 

[joelvin]

Red X means the text wasn't successfully sent. Tap and hold on the message (I believe) and select "Resend message". Data only needs to be enabled if it's an MMS message.