For iOS (iPhone/iPad):

1. Open the App Store on your device.
2. Search for “3CX” in the search bar or use this Link
3. Look for the official 3CX app.
4. Tap the Download button (cloud icon) and install the app.

For Android:

1. Open the Google Play Store on your device.
2. Search for “3CX” in the search bar or use this Link
3. Look for the official 3CX app.
4. Tap Install to download and install the app.