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Blocking is great for known scammers, but what about that unknown number that might be your doctor, a delivery driver, or a job interviewer? You don’t want to block them, but you also don’t want to answer a robocall. This is where call screening comes in. It puts you back in control of the conversation.

1. Android’s Secret Weapon: Google Call Screen

If you own a Google Pixel phone (and increasingly some other Android devices), you have access to one of the most powerful anti-spam tools available.

2. Visual Voicemail: Screen Without Picking Up

Traditional voicemail is painful—dialing in, listening to menus, and waiting through slow messages. Visual Voicemail (available on iPhone and most Androids) downloads messages to your phone so you can see them as a list.

• The Benefit: If an unknown number calls, let it go to voicemail. With Visual Voicemail (and transcription on newer iOS versions), you can read the message instantly. If it’s a scammer, they usually won’t leave a message. If they do, you can delete it without listening.
• How to get it: Check with your mobile carrier (O2, EE, Vodafone, Three). Some include it for free; others charge a small monthly fee.

3. “Do Not Disturb” Whitelisting

Instead of trying to block the bad guys, why not just allow the good guys? Configuring “Do Not Disturb” (DND) effectively can give you total peace of mind.

The Strategy:

1. Go to your phone’s Contacts app and “Star” or “Favorite” your essential people (family, school, work, doctor).
2. Go to Settings > Sound > Do Not Disturb.
3. Set Allow Calls From to “Favorites Only” (or “Contacts Only” if you prefer).
4. Turn DND On.

Now, your phone will remain silent for all unknown numbers, spammers, and cold callers. They will go straight to voicemail. If it is important, they will leave a message. Your favorites will ring through as normal.

4. Custom Ringtones

A low-tech but effective screening method.

• Step 1: Set your default ringtone to something very subtle (or even a “silent” ringtone file).
• Step 2: Go through your Contacts and assign a loud, distinct ringtone to your friends and family.
• Result: If your phone is making a noise, you know it’s someone you know. If it’s vibrating or silent, it’s an unknown caller—ignore it without stress.

Call Screening Apps and Features Compared

Not every screening tool works the same way. Some rely on your phone’s hardware, others use cloud databases, and each has different strengths. Compare the leading options to find the right fit for your needs:

Screening Effectiveness by Call Type

Different call types respond differently to screening. This chart shows the estimated effectiveness of automated screening for each common nuisance caller category:

Automated callers hang up when encountering screening. Human scammers may persist but often give up when asked to state their purpose. Genuine callers almost always leave a message.

The Combined Defence Strategy

For maximum protection, combine call screening with other privacy measures. The most effective approach is a layered defence:

1. Layer 1 — TPS Registration: Prevent legitimate marketing calls from reaching you in the first place.
2. Layer 2 — Spam Detection App: Use Hiya, Truecaller, or your phone’s built-in spam filter to flag known scam numbers before your phone even rings.
3. Layer 3 — Call Screening: For unknown numbers that get through, use Google Call Screen, Live Voicemail, or Do Not Disturb whitelisting to filter without answering.
4. Layer 4 — Report & Block: When a bad actor does get through, block the number and report it. This feeds the community databases used in Layer 2.

With all four layers in place, the average UK phone user can reduce unwanted calls by an estimated 85-95%. Start with TPS today at tpsonline.org.uk.

Hanging up on a nuisance caller feels good, but reporting them feels better. While it might seem like a drop in the ocean, every report helps UK regulators build a case against rogue companies. These reports are the evidence needed to raid call centers, seize equipment, and issue fines of up to £500,000.

Where Should I Report?

The UK has different organizations for different types of phone trouble. Reporting to the right one ensures your complaint is acted upon.

Information You Need to Gather

Before you start filling out forms, try to capture these details. The more evidence you have, the stronger the case.

• The Number: Dial 1471 immediately after the call if you didn’t catch it.
• Date & Time: Accurate to within a few minutes.
• The Company Name: If they mentioned it (e.g., “Eco Solar Ltd”).
• The Topic: What were they selling? (Accident claims, insurance, windows).
• Your Number: Whether you were called on landline or mobile.

How to Report: Step-by-Step

Method 1: The ‘7726’ Service (Mobile Only)

This is the easiest way to report spam texts and calls on your mobile.

1. For Texts: Forward the spam SMS to 7726. You will receive a reply asking for the number it came from. Reply with that number.
2. For Calls: Send a text to 7726 with the word “Call” followed by the scam number.

Method 2: Online Forms

For persistent offenders, use the official web forms.

• ICO Complaint Tool: Visit ICO Website
• Ofcom Complaint Form: Visit Ofcom Website

Managing Expectations: What Happens Next?

It is important to know that you won’t get a personal reply or a “case update” for every report. The ICO receives over 100,000 complaints a year.

Instead, your report feeds into a massive intelligence database. When the system flags a number generating thousands of complaints, regulators launch an investigation. This leads to:

• Fines: Companies can be fined up to £500,000.
• Director Disqualification: Directors can be banned from running companies.
• Raids: Police and ICO officers can raid offices and seize servers.

So please, don’t think “it’s not worth it.” Your report could be the final piece of evidence needed to shut down a major scam operation.