Tata Docomo
Invalid Sim Card

Hi,

I am chethan, having problem with TATA DOCOMO Network . my gsm is not working its giving message as " INVALID SIM" from past 1 month.every time i need to switch off my mobile and switch on it again to make it Valid

sim..it will last for few minutes and again same "INVALID SIM" message.

I am not to call during that time..