gokere

Hello, i am the new proud owner of a f910bt. However i cant open my unit in testmode. I do everything in that topic download files unzip and copy to sd drive but every time my unit open normaly. There is no problem with the sd card coz i try to put some mp3 in it and i can see and play. Also pls tell me how can i make a backup of my current F910bt before i start modifying ? Thanx in advance, Goker.