TO ALL MY WELL WISHERS

TO-DAY I RECEIVE 1 8210 WITH " NO NETWORK FOUND ",I HAVE CHANGED THE ANTENA SWITCH,IF IC AND PA.STILL THE PROBLEM IS HERE,THERE IS NO SIGNAL.WHAT SHALL I DO?MAY BE I AM DAMAGING THE COMPONENTS BY WORKING AT A TEMPERATURE OF ABOUT 600 DEGREES?GIVE ME HINTS,THANKS.