Samsung Galaxy S5: How to Block Unwanted or Unknown Calls in Android 4.4.2 Kitkat

Have you ever felt so annoyed when unwanted persons kept calling you? Or, have you ever been in a situation when you didn't want to receive any call? Or, have you ever wanted to be able to block unknown calls? If that so, you can save yourself from those problems by using the reject calls feature which will let you block incoming calls according to your need. When a blocked number calls you, the caller will hear the tone once or twice and then will be rejected whilst you won't be notified (either by ringtone or call notification) so that you won't be bothered again with those unwanted or unknown calls.

How to block all incoming calls?
You can do so by using the following steps:

1. Open Phone app.
2. Tap or long press the Recent apps key to open up the additional options and then select Settings.
3. Tap Call.
4. Tap Call rejection.
5. Tap Auto reject mode and then select All incoming calls.
6. Now, you'll see is displayed on the status bar as a sign that all incoming calls will be blocked or rejected.

How to block incoming calls from specific phone numbers or criteria?
You can do so by using the following steps:

1. Open Phone app.
2. Tap and then select Settings.
3. Tap Call.
4. Tap Call rejection.
5. Tap Auto reject mode and then select Auto reject numbers.
6. Tap Auto reject list.
7. Add a phone number or criteria to the auto reject list:
• Tap .
• Enter the phone number or criteria in the enter number field or tap to select contacts from call logs or Contacts app.
• If necessary, you can change the criteria by tapping Match criteria and then select from the following options:
• Exactly the same as: select this option to block the phone number which is exactly the same as the number you have entered in the enter number field.
• Starts with: select this option to block all the phone numbers that are started with the number you have entered in the enter number field.
• Ends with: select this option to block all the phone numbers that are ended with the number you have entered in the enter number field.
• Includes: select this option to block all the phone numbers contain with the number you have entered in the enter number field.
• Tap Save button to add the phone number or criteria to the auto reject list.
• Now, incoming calls from the selected phone numbers or criteria in the auto reject list will be blocked or rejected.
8. Remove a phone number or criteria from the auto reject list:
• Tap .
• Select the required phone numbers or criteria you want to remove from the auto reject list.
• Tap Done button.
• The selected phone numbers or criteria will be deleted from the auto reject list.

How to block incoming calls from unknown callers?
If you don't want to receive incoming calls from those who have not been added to the Contacts app, then you can block all incoming calls from them by using the following steps:

1. Open Phone app.
2. Tap and then select Settings.
3. Tap Call.
4. Tap Call rejection.
5. Tap Auto reject mode and then select Auto reject numbers.
6. Tap Auto reject list.
7. Check the box next to Unknown to activate it.
8. Now, all incoming calls from unknown callers will be blocked or rejected.

As a note, even though you're not notified when blocked phone numbers call you, but you still can find out who they are in the call logs. All blocked calls will be labelled with to distinguish them with other call logs.