Samsung Multiroom M5 WAM551 User Manual page 29

Press the smart device's Home button to leave app and select Settings.
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Choose the M5's Wi-Fi point.
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Select [Samsung] M5. This is the default M5's name. The M5 connects to your smart
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device.
(The default security PIN is 1234567890.)
Use the keyboard that appears to enter your password.
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