Why my phones baseband unknown and imei unknown

My Huawei ascend p6 is not reading the sim card and show basebend version unknown and imei unknown and after some time when i put down my cell about 7-8 hours it works and aftersome time create the same problem.

"hi

I'm using huewai p6 u06.My Mobile showing no service. I check IMEI is BLANK and baseband unknown.its bought from dubai.now i'm in india. here i don't have a service center.anybody knows how to repair my mobile means please give me a link......"