To switch, however, the cell phone needs a new boot.
Voice quality and keys very well.
Mute and conference call also possible that so many different phone has not ...
Addendum * 27/03/2011 *
Well, after I wrote the Rezesion,
has now become well aware that when you enter a phone number or a text wants to write, just press on the side button must to switch cards between 2 Sim ..
Sorry for the bad info .... !!
It needs no boot NEW!