Caps-Lock OSD and CD Eject Application Software

I have a dell venue pro 8g when any digit number beginning with # or *, example # 123 # or * 150 # says failure, sometimes I bring the screen but not allow me to select.

I have just bought 12 x T610's that I put around the country. I know I could call support about this, but I've tried and it doesnt seem that the knowledge concerning this was available when I called support: The problem: I am unable to boot from virtual media (iso-file)