Samsung Galaxy S4 won't send sms text.
I have a Android Samsung Galaxy S4 Active and I cannot send a simple sms text to anyone. When I try to send just a plain text with no pictures to just one person, I get " message will be sent the next time mobile data is turned on" or mobile data must first be turned on to send message. Why? I have never had to do this before and shouldn't have to now. Any suggestions?