What can we say when we tell you to convert your USB removable disk into a phone? We mention the possibility of installing the famous Skype in it and use it on any computer.
It's easy, you only save in pen drive and it has pulgin on any computer. Run skype portable and you can chat and phone your friends.
It is extremely comfortable, you do not have to install anything on the computer you use and your contact will be the same as usual.
This portable version of Skype works like standard one, you can use the functions you use and find the same interface.