i have bought n81-3 yesterday on 31aug08 i m facing network signal problem i dont know why when i hold handset in normal position like holding backside of keypad network bar goes low and out of network i have searched about it and found that the antenna is on back of lower part of handset means keypad so guyz normally when we hold handset we grab area of keypad so how to solve this problem this is a serious issue plz seniors help me out