Download Apple 4s Programming instructions

19 No Service or No Service appears in the upper left-hand
corner of the screen.
20 A "waiting for activation" message may appear. Select
Dismiss.
21 An "iPhone was not activated" message may appear.
Select Try Again.
If "iPhone is not Activated" error messages continue to
appear, restart the iPhone.
Press and hold the Power key and then slide the arrow
icon to turn the device off. Press the Power key to turn
the device on again.
22 iPhone is activated will appear.
Select Dismiss.

11.06.2013
If the iPhone does not activate, ensure that you
are in a coverage area and that at least 1 or 2
coverage circles appear.