Hi there,
I understand that this is an issue for you. Follow these steps, and they should help:
Make sure Siri is on:
- Open Settings
- Go down and tap General
- Tap Siri
- Make sure Siri is on by turning the switch to the right. If it's already on, it'll show a green background. Just leave it like that.
Make sure you're using Siri correctly:
Make sure your holding down on the home button until a screen appears saying "What can I help you with?" then start talking.
-Make sure you have an internet connection or cellular connection
-Make sure your connection is good, and that your internet isn't down or your cellular network isn't down as well.
-Make sure your microphone is not blocked, damaged.
Refer to here for more information: iOS: Troubleshooting Siri
Try resetting your network settings:
WARNING: These steps will make you lose any entered passwords in already joined networks. SAVE ANY IMPORTANT DOCUMENTS OR WEBPAGES, YOU MAY LOSE THEM.
- Open Settings
- Tap General
- Go down, tap Reset
- Tap Reset Network Settings
- If prompted for a pass code, enter it.
- Tap Reset Network Settings
- A series of different screens will show. This is normal.
- Once this is done, unlock your phone and try connecting to a network or cellular network.
- Try using Siri.