$ adb shell am start -a android.intent.action.CALL -d tel:telephone_number
Starting: Intent { act=android.intent.action.CALL dat=tel:xxxxxxxxxxxxx }If you have multiple devices connected with laptop/desktop, use “-s serial_no” to distinguish which device your want to use adb with. You can serial number using “adb devices” command.
replace “telephone_number” with 10 digit mobile number after country code to whom we want to call.