ok man sometimes operator strength signal is not enough strong but in buildings can loose some lines from signal. other problem is that in your pocket the phone antenna is contacted with other material , so it can looses signal too. but if this phone do this once or more per day it is phone problem , so u must go to your nokia dealer to see your phone. if any of other suggestion didnt work ,
before there is blank logo on nokia wap site. But if there isn't , just search through your phone type clean logo or blank logo in google search and you will find what u need. i hope it will helps
hmm man the only thing u can do is to block sim card. But if your provider support the service of checking IMEI u can search it with their help(in other words to see from where phone calls are made with this phone).cause the IMEI is transmitting with the signal from phone sorry to hear that
hmmm man there are kinds of people and everyone of them want different things from life One want to get more and more friends, other want to share their experience with phones and share pictures , themes , etc. so at that point , u can ignore them and dont worry our world is so colourful regards