no phone calls when in idle on Huawei Accend P6

[Vera Kalibekova]

Hello, everybody! I got my P6 in July and was very happy with it, just until I came to Egypt. Here it start to give me a problems: people trying to call me, and getting messages, that my phone is turned off. And it is not. I went through the settings, everything is on. May be some option, that I don't know, and I have to enable, or disable it? Please help.