The password for a mobile Brother printer is the model number and the last 5 digits of the serial number.

Sometimes when software updates are implemented you are suddenly faced with a request to enter a password when you have never been asked for a password before.

One such scenario is updating the mobile device's operating system and the printer now wants a password.

For the Brother line of mobile printers, the password is the model number followed by the last five digits of the product serial number.

Model 662 if the last 5 digits are 12345, the password is 66212345
​Model 663 if the last 5 digits are 12345, the password is 66312345
​Model 773 if the last 5 digits are 12345, the password is 77312345
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