only obvious that you would first ring up the service provider to find out details before signing up with them. so use this as an opportunity to understand how well they communicate with you. if they are professional and as good as they claim to be, they would be sure to help you with the best of services and support. the way the telephone conversation goes would also help you identify and judge this factor. so pay close attention!
ask yourself the above and find the perfect service provider to work with! 