What do you do if someone calls your phone and it does not ring it just vibrates?

If your phone vibrates without ringing when receiving a call, first check if it's in silent or do not disturb mode, which may be set to vibrate only. Ensure that your ringtone settings are properly configured and that the volume is turned up. If the issue persists, consider restarting your phone or checking for software updates. Additionally, inspect the contact settings to see if specific contacts are set to vibrate only.