Sir, i have motorola v9 problem in my cell fone poor signal sand me solution plz

Hello,
Problems which cause Network Signal transmission going down or not coming properly can be caused for 2 causes.
The first cause is the Network Provider's system is having some kind of problem with your Sim.
The second cause is that your phone's internal antenna which actually receives the signals form the your Network's tower, is damaged or not properly functioning.
Also, Signal strength also depends on where you are and who is your network provider.
I assist you that you borrow any one of your friend's Sim and see if the Signal strength is OK or not. If yes, then it is the Network provider's fault, if still low signal strength persists, the problem is with your phone. In this case, take it to the Motorola Service Center.
Thank You.