13. Turn off your iPhone. Press and hold the top button. When Slide to power off appears, slide.
14. Turn on your iPhone on by holding down the top button. Wait until the Apple logo appears on the screen
15. From the Home Screen, tap Settings->Wi-Fi->Off
16. From the Home Screen, tap Safari.
17. Load a web page, and test that your Data connection works.
18. Tap Settings->Messages->iMessage Off