Well for the blocked number, call the phone company. For Sim City 4, try running the setup directly from the CD, if it still has issues, its probably the CD thats not working.
To find out if it is the CD - make an image of it then mount that image..a 100 % success in creating the image means that the CD is fine. What OS are you using? Maybe try and run it under Windows XP compatibility if you are using Windows 7.