Use APKPure App
Get Vibration on calling old version APK for Android
Vibrate your device when you receive a call.
Vibrate your device when you receive a call.
PLANET COMPUTERS 'Cosmo Communicator only vibrated once when there was an incoming call when the screen was closed, and could not find a setting to vibrate continuously.
This was made to vibrate continuously.
Source code: https://github.com/developer-mkh/android/tree/master/Vibrationoncalling/app