CS is the card sharing technique which ensures that you can share the channels with your friends and loved one irrespective of the city and country. There are number of companies which offer you with the CS server facilities and you need to choose the one which is reliable. They offer you with stable server which is maintained and configured along with the operating system. You can check the speed of their server by taking the free CS server test. If you are not able to open any channel, then you can easily contact them.