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Wi‑Fi Security Alert: MAC Blocking Isn’t Enough — What to Do Instead

Friends — read this carefully. I’m explaining step‑by‑step so it’s easy to understand. If you block someone on your router, their device’s MAC address is usually blocked — but modern phones can change the MAC they use, and the block stops working.

Wi-Fi security alert illustration
MAC blocking is helpful, but it’s not a reliable lock by itself.

Why MAC blocking can fail

When you block a device on your router, it blocks that specific MAC address. But many modern Android phones can randomize their MAC address for privacy. That means the blocked user can appear as a new device and reconnect.

How the bypass happens (simple steps)

  1. They enable Developer Options (Settings → About → tap Build Number several times).
  2. They turn on the setting that randomizes the MAC address.
  3. They “Forget” your Wi‑Fi network and reconnect.
  4. The phone shows a new MAC address, so the old block doesn’t apply.

What you should do instead (quick & effective)

Short answer

Blocking by MAC can be bypassed. If you suspect someone is back on your network, change the password and tighten your router settings. Stay safe.

Safety note: This post is for defensive awareness only. Use this knowledge to protect your own networks and follow the law.

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