Actually m trying to block sum number but it doesnt gett blocked asi select the contact and press main menu button the task manager comes

To clear all blocked calls from your Panasonic KX-TG7871 phone, follow these steps:

1. Press the "Menu" button on the handset.
2. Use the up and down arrows to scroll to "Settings" and press "Select".
3. Scroll to "Call Block" and press "Select".
4. Scroll to "Block List" and press "Select".
5. Use the up and down arrows to highlight the number you want to unblock.
6. Press the "Erase" button, then press "Yes" to confirm.
7. Repeat steps 5 and 6 for all numbers you want to unblock.
8. When you are finished, press the "Off" button to exit the menu.

Note that if you want to clear all blocked calls, you will need to go through the list and erase each number individually. There is no option to clear the entire block list at once.

To erase a number from your blocked calls list;

Press  [MENU] [#] [2] [1] [7] 

Press the [?] or the [?] button to select "Block a single number" or “Block range of numbers", press "SELECT"

Press [SELECT]Press the [?] or the [?] button to select the telephone number that you want to erase.

Press [ERASE]

Press the [?] or the [?] button to select [YES]

Press [SELECT]

Press [OFF]



To erase all blocked numbers;

Press  [MENU] [#] [2] [1] [7] 

Press the [?] or the [?] button to select "Block a single number" or “Block range of numbers", press "SELECT"

Press  [MENU]

Press the [?] or the [?] button to select "Erase All", press "SELECT"

Press the [?] or the [?] button to select [YES]

Press [SELECT]

Press the [?] or the [?] button to select [YES]

Press [SELECT]

Press [OFF]

Follow these steps to block an Incoming Call
Step-1
Wait until your phone rings and displays the caller ID information
Step-2
Press the "Block" button on your handset.
Step-3
Press "Menu/Select" or "Block" to confirm your decision.
Block in Standby Mode
Step-1
Press the "MENU" button on your handset.
Step-2
Press the down arrow button to select "Call Blocking.
Step-3
Enter the 10-digit phone number, if creating a new entry. Otherwise, press the "Menu/Select" button to confirm your choice.

I would recommend an app called LEO Privacy. It can help you add the disgusting phone numbers to blacklist to stop spam and harrassing phone calls from bad guys. LEO Privacy Applock Boost Hide Android Apps on Google Play

You can block text messages from a specific number or contact on your Android device with a third-party solution. Just follow these steps.


Blocking Text Messages

Option 1

Note: These steps are for the stock “Messaging” app included with Android 5. Some carriers may include a different app for messaging.

Open “Messaging“.
Press the “Menu” Menu icon icon located at the upper-right corner.
Select “Blacklist“.
Set “Blacklist” to “On“, then select the plus (+) to add a person to block.
Type the number you wsih to block. Check “Block incoming calls” and/or “Block incoming messages” as desired, then select “OK“.
If you wish to remove a number from Blacklist, select the number, then choose “Delete“.
Option 2

If your messaging app does not offer a Blacklist option, use Handcent.

Download and install Handcent SMS for your text messaging needs. It’s available in the Google Play store.
Since you’ll be using Handcent for text messaging, disable the notifications for your current text messaging app. Otherwise, you’ll get double notifications for text messages.
Open Handcent then select the “Menu” Android menu button icon at the upper left corner of the screen, then select the gear in the lower left corner of the screen.
Select “Security & privacy” > “Manage blacklist“.
Tap the plus (+) icon to add the phone number you wish to block. You can choose one from your contacts, call logs, or input the number directly.


Now all of the text messages from that person will be blocked and not visible in the Handcent app. You won’t get notifications you’ve received a message from the person either. If you ever want to unblock the person, return to the “Manage blacklist” screen, tap it, then select “Unblacklist“.

Some users have reported that the app “Private Space” works well for them.

Sending an Automatic Reply

If you want to let a person know they have been blocked, you will need to download and install SwiftReply. SwiftReply will allow you to setup an auto reply for specific Contacts.

Ensure the mobile number you wish to block is listed in your Contacts.
Open “SwiftReply” and tap the plus icon (+) to make a new auto-reply.
Type the name you would like to use for the reply and the text you would like to send to the person.
Scroll down and select “Enable User Filter” > “Contacts“.
Tap “Add” and choose the people in your Contacts list that you would like to receive the reply. Tap “Done” when your list is complete.
Tap “Save“, then tap “Off” to turn the auto-reply on.
The specified people will now receive your message automatically and Handcent will block them from your view.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/josem_e9ac89730196f220

yes, in phone number recall area. number history. find number you want to block hit settings then add to reject list.

I would assume you are using an android samsung device.
Depending on device steps may differ.

Open Contacts, find the contact you blocked and touch it to select it, then press Menu and More, then tap Remove from Reject List
Then...
Press Home button, open Applications, go to Settings, then Call, then Call Rejection, open Auto Rejection List, find number blocked and touch it and hold until menu pops up, touch Delete then OK. Press Home button.

Number is no longer blocked

Hi To unblock the accidentally blocked number you need to do the following Press the MENU key Select MESSAGING Scroll down the list and select SETTINGS Select TEXT MESSAGE Select BLOCK NUMBER Highlight the number you wish to unblock and select OPTIONS Select DELETE Select either DELETED SELECTED or DELETE ALL and press OK Briefly press on the ON/OFF button to return to the Main Screen