Yes, you can. “Tap for more details” in the “Calls” area on the Self Care home, expand the “Blocking rules” area and tap “Add rule”. You can block a specific phone number or a pattern. For example, you can block all the calls from phone numbers starting with a specific country code, or those from numbers ending with the same digits, or those from numbers containing the same digits. Once you selected the type of numbers you want to block, enter the value in the “Value” field and tap “Add rule”.