What to do if I forgot the password on the Doro PhoneEasy 620?

I have a Doro 620 that I want to sell, but it won't take the password I enter in order to do a Master Clear.  I tried removing battery for 15 minutes, but obviously the info is kept in NVRAM.  I only have two numeric only passwords and it should have been one of them.   How can I clear the memory?  How could I possibly sell the phone if the new user can't enter his own password?

Hi Bob. Did you change the password before? If you didn't, have you tried 1234? I'm not sure but have you tried using Doro Manager?

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