How to Change the Default Phone and Calling App on Android

Making and receiving phone calls is the core purpose of a mobile device. However, factory dialer applications bundled by phone manufacturers may lack advanced caller identification, spam screening, customizable keypad tones, or integrated VoIP capabilities. Unlike restricted mobile ecosystems, Android allows you to designate third-party dialers—such as Google Phone, Truecaller, Simple Dialer, or CallApp—as your system’s master default phone application to handle incoming calls, dial pads, and voicemail.

Why Setting the System Default is Essential

Simply installing an alternative dialer from the Google Play Store is not enough; Android requires explicit permission to grant a third-party app full default telephony authority. Setting the app as the default calling app allows it to display the full-screen incoming call notification over your lock screen, access call logs, route emergency numbers accurately, and filter spam calls before your phone rings.

How to Change the Default Phone App in Android Settings

Configuring your preferred dialer takes under a minute:

1. Open the Settings app on your Android smartphone.
2. Tap on Apps (or Apps & notifications).
3. Tap on Default apps.
4. Locate and tap on Phone app (or Calling app).
5. A list of all installed telephony applications will appear (e.g., System Phone, Google Phone, Truecaller).
6. Select your preferred alternative dialer.
7. Exit the Settings menu; your new phone application is now active system-wide.

Configuring Caller ID and Spam Protection

To eliminate annoying telemarketing Robocalls, verify your Caller ID defaults:

1. In the same Default apps menu, tap on Caller ID & spam app.
2. Select your preferred filtering engine (such as Google Phone or Truecaller).
3. Now, when unknown numbers call, your chosen spam filter cross-references incoming numbers against global community databases and labels suspected fraud calls in red.

Troubleshooting Missing Incoming Call Notifications

If your phone rings but the screen does not display the caller pickup interface after changing default dialers:

1. Navigate to Settings > Apps > See all apps and select your new dialer.
2. Tap on Permissions and ensure Phone, Contacts, Call logs, and Microphone are set to Allowed.
3. Tap on Display over other apps and ensure the permission is toggled Allowed so the dialer can pop up over your lock screen.
4. Under App battery usage, set the app to Unrestricted to prevent Android’s background optimizer from killing the dialer service.