What Does Calling Restrictions Mean
What is a call restriction? ۔
My friend on my cell phone says he stops calling whenever he tries. Do you know how to solve the problem?
Contact your service provider ...
This means that the number has limited service. This generally applies to international calls, premium SMS, etc.
Try turning the switch off or imitating the test on another switch to see if it works. This will help you determine if this is a problem with your phone or your service provider.
The best thing to do is call your company and ask them.