facetime is not enable when i came to egypt (i bought the ipda from uae)

What is the model number of your iPhone? Settings>General>About>Model.

You may have to scroll to see the entry for Model.

Since iOS 12.2, the Model Name is displayed as well as a generic model code

There is a good chance that your iPad was meant for the Middle Eastern

market. FaceTime will not work out except with certain wireless providers

in certain countries within that area. FaceTime will not be available if

the iPad is moved out of the restricted area.

imoble is absolutely correct. You will most likely never be able to use Facetime in Egypt with an iPad purchased in the UAE.