Samsung Auto Reject Call Setting
Below is guidance on how to set auto call reject or you may refer how to blacklist number from calling in. Apply only for Samsung Android devices.
How to: Auto Call Rejection on Samsung Android Devices
Steps to activate this feature:
2. Go from Call Settings -> All Calls and select Auto Reject
4. From here you can create a set of blacklisted numbers using the menu button. The list of numbers will be saved and you can toggle when they are blocked.
On log list you choose any no to blacklist
Click and hold that particular no about 3-5 sec
An option will be pop up
Choose "Reject List"