Set up the 3CX app on your mobile

The 3CX app puts your work extension on your mobile, so you can make and take business calls without giving out your personal number.

Install and sign in

1. Install the 3CX app from the App Store (iPhone) or Google Play (Android). It’s free and published by 3CX.
2. Open the app, accept the licence agreement and allow access to the microphone and camera.
3. On a computer, log in to the 3CX web client. Your 3CX web address is in your 3CX welcome email.
4. Click the QR code in the top right corner of the web client. If you’ve set up the app before and the button isn’t there, open Apps in the web client to get a new QR code.
5. Scan the QR code with your phone. Your welcome email also includes a QR code you can scan.
6. Allow the permissions the app asks for. When it shows “Ready for calls” you’re done.

Adding a second phone or tablet? The QR code button disappears after your first setup. Open Apps in the web client to get a new QR code for the extra device.

During a call

• Transfer: tap Transfer. A blind transfer sends the call straight through. An attended transfer lets you talk to the other person first, then join them.
• Conference: tap Conference and choose someone by name or extension, or type a number. They’re added to the call when they answer. From the conference screen you can mute or drop people, or add more.
• New call: puts the current caller on hold while you make another call (iPhone).
• Record and Video are there too, if your system allows them.

Your status and forwarding

Tap the coloured status box in the top right to switch between Available, Away, Do Not Disturb, Lunch and Business Trip, or set a status for a set time. Tap the pencil or arrow next to a status to change where your calls go while it’s on. Our divert guide explains the forwarding options.

Calls don’t ring on my phone

The app relies on push notifications to wake your phone for incoming calls. Most problems come down to the phone blocking them.

On any phone

• Make sure notifications are allowed for 3CX in your phone’s settings.
• Check that Do Not Disturb or a Focus mode isn’t turned on, either on the phone or as your status in the app.
• Make sure 3CX is allowed to use mobile data, not only Wi-Fi.
• If your phone has been switched off or offline for two weeks or more, scan a fresh QR code from Apps in the web client.

On Android

1. In the 3CX app, tap the menu in the top left, then Settings, then Advanced.
2. Turn on Switch Off Battery Usage Optimization and set 3CX to Unrestricted (the name varies by phone).
3. In the same screen, turn on Switch On Background Data.
4. If your phone has a “cleaner” or battery saver app, exclude 3CX from it.

3CX’s guides go into more detail:

• Using the 3CX app on iPhone
• Using the 3CX app on Android
• Android: not getting your calls?

If you’ve worked through these and calls still don’t come through, log a support request and tell us your phone model and whether it’s iPhone or Android.