Why am I unable to send text messages on my iPhone?

If you're experiencing difficulties sending texts (SMS) on your iPhone, follow these steps to troubleshoot the issue:

1. Check network connection

   1. Ensure you have a stable cellular network or Wi-Fi connection. Try toggling Airplane mode or switching between Wi-Fi and cellular data.

2. Verify message settings

   1. In Settings, under 'Messages', ensure 'Send as SMS' is on and your phone number or Apple ID is selected under 'Send & Receive'.

3. Restart your iPhone

   1. Hold the power button until 'slide to power off' appears, then restart your device.

4. Update iOS

   1. Check for updates in Settings > General > Software Update.

5. Carrier message settings

   1. Contact your carrier to verify account status and check for any known issues with sending texts.

6. Disable iMessage

   1. Temporarily turn off iMessage in Settings > Messages.

7. Verify recipient's number

   1. Ensure the correct phone number is entered.

8. Clear conversation history

   1. Delete conversation threads for specific contacts in the Messages app.

9. Reset network settings

   1. Reset network settings in Settings > General > Reset > Reset Network Settings.