iPhone 5, 5c, 5s – Service Update
The following steps are intended for the Apple iPhone 5, 5c, and 5s running any iOS.
You will need to be connected to Wi-Fi before completing these steps. If you need help connecting to Wi-Fi, please Click Here.
Tap the Phone App
Dial ## 873283 # and then press Call
When the service update is completed, you will return to the dial pad.