JanoH, does your player hang at the voip message screen?
Also, does your player have voip function?
If yes to both, you may have flashed in a non-compatible firmware for the voip function. There is a voip enabled firmware
HERE.
However, if it does not hang at the voip message screen or you don't have the voip function, i would suggest that you leave it as it is. There was a recent thread about this voip message and seems that there is no solution
here.