Try admin/motorola for username/password
Sorry. admin/motorola is the factory default and there's no secret/backdoor. There is only one thing on the modem that can be changed and that's
The only thing a reset would change is to set the password ***** to factory default.
Is the modem under warranty?
Yes. They'll be similar to this (see attachment)
That modem's not branded with an ISP name is it?