A sales rep reports that her Android phone suddenly stopped connecting to the office Wi-Fi network after IT changed the wireless passphrase earlier that morning. The handset sees the SSID and tries to join, but after a few seconds it shows "Saved, secured" and displays an APIPA address in the 169.254.x.x range. Other employees using the new passphrase have no issues. Which action should the technician try first to restore Wi-Fi connectivity?
Toggle Airplane mode off and on to refresh the wireless radios
Reset the phone's VPN settings and retry the connection
Disable randomized MAC addressing for the SSID
Forget the saved Wi-Fi network and reconnect, entering the new passphrase
Because the phone still holds the old, now-invalid credentials, the access point rejects its authentication attempt, preventing DHCP from assigning an address and leaving the handset with an APIPA address. Removing the stored profile forces the device to discard the cached PSK and prompt for the new one, allowing a normal handshake and DHCP lease. The other options do not address the incorrect credentials that are blocking association.
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What is an APIPA address and why does a device get one?
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What is randomized MAC addressing, and why might it affect Wi-Fi connections?
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What does 'Saved, secured' mean on Android Wi-Fi settings?