[Resolved]  Tata Docomo — Hang of mob due to sim problem

Hi this is Deepak I buyed Docomo SIM before 6 month ago and when i purchased that time it was giving some problems like Mobile Hang so i Changed my mobile still problem persists but after complaining so many time problem solved, But now the same problem started from last 15 days. so i changed my mob also still facing problem. How many times i have to change mob handset ??? I fade up of Docomo service!!
my docomo mob no is [protected]