Android:

1. Customizing Alert Tones:

• Go to Settings:

  • Open the "Settings" app on your Android device.

• Select Sound Settings:

  • Navigate to "Sound" or "Sound & Vibration" settings.

• Choose Default Notification Sound:

  • Locate the "Default notification sound" option.
  • Select your preferred sound or tap "Add" to choose a custom sound from your files.

• Setting Contact-Specific Tones:

  • Open the Contacts app.
  • Select a contact.
  • Tap "Edit" and then "Set ringtone."

2. Customizing Vibration Patterns:

• Access Vibration Settings:

  • In the "Sound" or "Sound & Vibration" settings, find "Vibration pattern."
  • Choose from default patterns or create a custom one.

• Assigning to Contacts:

  • For contact-specific vibrations, use a third-party app like "Vibration Pattern" from the Google Play Store.

3. Changing LED Colors:

• Install LED Control Apps:
  • Some Android devices come with built-in LED customization options.
  • For more control, try third-party apps like "Light Manager" or "LED Blinker Notifications."

iOS (iPhone):

1. Customizing Alert Tones:

• Access Sounds Settings:

  • Open the "Settings" app on your iPhone.

• Go to Sounds & Haptics:

  • Find and tap on "Sounds & Haptics."

• Choose Text Tone:

  • Under "Sounds and Vibration Patterns," select "Text Tone."
  • Pick a tone from the available options or tap "Vibration" to create a custom one.

• Setting Contact-Specific Tones:

  • Open the Contacts app.
  • Select a contact.
  • Tap "Edit" and scroll down to "Text Tone" to set a custom tone.

2. Customizing Vibration Patterns:

• Create Custom Vibrations:

  • In "Sounds & Haptics," tap "Vibration."
  • Choose "Create New Vibration" to craft a personalized pattern.

• Assigning to Contacts:

  • Unfortunately, iOS does not allow assigning custom vibrations to specific contacts for SMS. It's a system-wide setting.

3. Changing LED Colors:

• iOS LED Limitations:
  • As of my last knowledge update in January 2022, iOS does not support LED color customization for notifications, as this feature is restricted to certain models and specific app notifications.

Additional Tips:

• Explore Third-Party Apps:

  • For more advanced customization options, explore third-party apps available on your device's app store.

• Regularly Check Settings:

  • Device settings and options may evolve with software updates, so periodically check for new customization features.

• Stay Mindful of Battery Usage:

  • Intensive customization, especially with LED notifications, may impact battery life. Adjust settings accordingly.

By following these steps, you can personalize your SMS notifications, making your smartphone experience more intuitive and enjoyable. Keep in mind that specific features may vary based on your device model and the version of the operating system.