received a phone as a gift. I can not turn on wifi. when you go to settings on the phone has no wifi icon. when I get the connection settings and the Communication Manager then the wifi settings I have to turn on and off but it is gray and can not even turn on or turn off. Same with bluetoth can not be turned on or off. I did reinstal system from Sony ERICSSON UPDATE SERVICE but nothing changed again the same. I can not turn on wifi. Is there any chance of changing the system. is it the system? PLEASE HELP ME IF YOU CAN!????