Safeguarding your phone from predatory foreign numbers requires active device management, third-party software tools, and defensive habits.
Start by adjusting your phone's native settings. Both modern iOS and Android operating systems feature built-in controls designed to filter unverified incoming traffic:
• Apple iOS: Navigate to Settings > Phone > Silence Unknown Callers. This setting routes any incoming number not listed in your contacts, messages, or email history straight to voicemail.
• Google Android: Open the Phone app > Settings > Caller ID & Spam, then toggle on "Filter Spam Calls." This automatically discards flagged international robocalls.
• WhatsApp: Open Settings > Privacy > Calls, and enable Silence Unknown Callers. This neutralizes the growing flood of unsolicited messaging pings without disrupting normal communication with your saved contacts.
For more aggressive protection, install reputable spam call blocking apps like RoboKiller, Hiya, or Truecaller. These services maintain dynamic blocklists that detect emerging Wangiri sequences within minutes of deployment. Finally, contact your mobile service provider to request an account-level block on outbound international dialing. Restricting outgoing international calls ensures that even if someone in your household accidentally redials a +234 missed call, your carrier will stop the connection before high toll charges can post to your bill.
