i need help with my nokia 7710. i had it for 5 months now. on its first 2 months, it was working like a champ, where ever i go i had signal, at home, at work, anywhere. then after that 2 months, all of a sudden i lost my signal at home or whenever im in a building. can anybody suggest what can i do for my phone. i need help asap. thanks to anybody that would reply to this SOS