Build number 2.0_710ac

[almer22002]

Hi anyone have this build number and have they successfully upgraded it???

 

[100_Nossaum]

this was my original firmware, but when triyng to update just got hang screens and crazy buttons... now I can't go back to wmt2.0_710
copied to flash, when turn on the message "prepare software package" quickly desapears and drops to the beicked firmware !!! didn't get the setup started yet, and don't know how !