You can activate Last caller barring TalkTalk phone by following the steps mentioned below: Step 1 Sign in to your TalkTalk account. Click the link My Account to sign in. Step 2 Go to “Boosts and Calling Features” page. Step 3 In the “Privacy Features” section , tick the “Last caller barring”option. Step 4 Click “Update”. To speak to a customer representative, feel free to call on Talk Talk phone number.