Iphone4 sends a text message showing two identical ones.

See if the following conditions are met: 1) Your iphone is an ios5.0 1 or above system. 2) The other party also uses iphone, and the system is above ios5.0 1. 3) You both have iMessage.

If so, when you send a text message, if the signal is not very good, two identical messages will often be displayed on the opposite side, which is normal. There is no charge for imessage. When the signal is bad, it will be forwarded in the form of text messages. Maybe imessage just turned into this article and sent it in the form of traffic.

To avoid this situation, you two, if the signal is often bad, you can turn off imessage, which will be a ten-dollar message. If the "Send" button is green, there will be no two messages. You can also access wifi to send imessage. When the signal is good, imessage is more powerful, basically once a second, and there is no charge.