A new project transforms the Raspberry Pi a doorbell with video functionality. The doorbell can be used as an intercom too. You can then use your phone to communicate with whoever is at your door.
https://www.notebookcheck.net/Raspberry-Pi-Turn-the-popular-single-board-computer-into-a-smart-doorbell-and-intercom.459698.0.html
sir new app easypaisa to connected to load i am saying load to connected easypaisa app dont waste remaing rupesses