Problems making calls on your iPhone
If you are having problems making calls on your iPhone, you should:
· First, check your signal and make sure Airplane Mode is off. To turn off Airplane Mode, click Settings and then Airplane Mode.
· If you are still encountering problems, reset your network settings. Click Settings > General > Reset. Then, scroll down and click Reset Network Settings.
· If you still cannot make calls, then you may need to reposition your SIM. This can be done by removing the SIM card by inserting the end of the SIM eject tool into the hole on the SIM tray. Gently remove your SIM and reposition it back in the tray. Return your tray to the iPhone and push fully to reinsert.
· If none of the above work, you may need to restore your iPhone.