Problem of nokia 6600
 

Dear expert i have been using nokia 6600 with latest firmware but facing problem as when i goto talk with any person my net work signal suddenly comes to one point and some time total loss of signal strength.Kindly help me with proper suggestion as what i have to do.An early help in this affairs are solicited.Further i like to mention that if any spare necessary to change then the name or number of spare may kindly mentioned.Regards,malaker