Right here goes.....
Of your fone hangs/freezes or your having network connection issues. This is one of the quickest and safest ways to resolve these issues.
1. press HOME and POWER buttons
2. HOLD until the apple logo appears.
3. WAIT about 30 seconds
4. TURN ON
This is called a reset or reboot. It is the first thing you will be asked when calling CS (customer service)
SOMETIMES your SIM card needs removing (and a wipe to clean. U will be surprised how mich dust can get in) or reseating (yes just bouncing in your pocket can loosen ur SIM card)
Old Phone Geek!!! A Mobile User Since 1993
Samsung Galaxy S3
Feel Free to Add Kudos, If I Have Helped