Unhappy [Q] ZTE V985 I require manual access to recovery mode

I have a zte v985 phone that freezes at boot time, the start animation runs and suddenly stops there.
My mistake was to flash a rom without erasing the user data. I want to repair it but I don't know a
procedure for my specific situation since the phone cannot boot completely.

The V985 is a Nvidia Tegra 3 based phone, I have tried with some key combinations to get into
recovery mode without success. Any help to access the recovery mode will be appreciated.

Thank you.