Is there a way to stop unknown callers or telemarketers numbers from constantly calling my house?
We can try selective call blocking and anonymous call blocking if they don't show the phone numbers. For reference to these features see this article: Star Codes / Value Added Features
How do I do this, do I just put *77 into my phone at anytime and it will work?
Yes just pick up the handset and dial *77 once and you will hear a recording that anonymous call blocking is enabled.
You just need to do that once.
As for *60 selective call blocking - for specific numbers you have to do that for each # you want to block.
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