This is how to connect your 3CX extension to the app on your smartphone and computer. Requirement: credentials for the 3CX Web Client. They arrive by email with the subject “Your User Account on your New 3CX System” or from it-tects.
Smartphone (iPhone and Android)
Install the 3CX app: App Store (iPhone) or Google Play (Android).
Open the app, accept the license agreement and allow camera, microphone and notifications.
On your computer, open the 3CX Web Client (link in the email) and sign in.
In the Web Client, click the QR code icon in the top right.
In the app, choose Scan QR Code and scan the code on the screen. Your extension is set up automatically.
Tip (Android): Turn off battery optimization for 3CX when the app asks. Otherwise calls may not come through.
Windows
Install the 3CX app from the Microsoft Store and open it.
Enter the 3CX address from the email.
Sign in with your email address or extension and password, or with Microsoft 365 if offered. The app sets itself up automatically.
Alternative: In the Web Client, choose Apps › Windows App and click Provision.
Mac
Open the 3CX Web Client in Chrome or Edge and sign in.
Install the Web Client as an app via the browser menu (Install app or Install this site as an app). 3CX then appears in the Dock like a separate program.
Note: If the app says “Invalid QR code”, reload the Web Client and open the code again. If calls don't come through, check that your status is Available and notifications for 3CX are allowed.