Open your contacts, select the contact; when the contact displays, select the 3 dots in the top right and select the Send to Voicemail....that's LG version of blocking. If it's a caller that is bothering, go to your Recent Calls, and add the number to your contacts, then go back and do what I talked about above. Or....download a host of apps that will block calls. Whichever you feel you want to do.
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