Apple iPhone 4S

iOS 5

iOS 9.0 iOS 7 iOS 5

You can't make voice calls - Apple iPhone 4S iOS 5

Cause 2 of 9: Flight mode is turned on

If flight mode is turned on, you can't make or receive calls.

Solution: Turn off flight mode.

Step 1 of 3

Find "Settings"

Press Settings.

Step 2 of 3

Turn flight mode on or off

Press the indicator next to Airplane Mode.
Depending on the current setting, the function is turned on or off.

Step 3 of 3

Exit

Press the Home key to return to standby mode.

Press Settings.

Press the indicator next to Airplane Mode.
Depending on the current setting, the function is turned on or off.

Press the Home key to return to standby mode.