Step 2: Next, tap the Force Stop icon and select OK on the confirmation prompt. Step 1: Long-press the WhatsApp icon and tap App info to open the WhatsApp info page. Force Stop WhatsAppĪnother way to expeditiously fix this issue is to force-stop apps whenever WhatsApp calls are not ringing when your phone is locked. Go to Settings > Sound > Do Not Disturb and tap the 'Turn Off Now' button.ĭo Not Disturb can also be easily disabled from the System Tray. You'd find the 'Do Not Disturb' option in the Sound section of your Android Settings menu. If WhatsApp calls aren't ringing when your phone is locked, check that 'Do Not Disturb' isn't active. When enabled, Do Not Disturb will mute all incoming cellular calls and other third-party apps.