No, you do not have to vote all ballots at one time uninterrupted. You can disconnect from the Internet or the telephone and re-connect later, re-enter your PIN and any other credentials required and complete your voting activity at that time. In fact, if you find it more convenient, you can switch from one method to the other and complete your voting using the other method. For example, you can start your voting on the Internet and at some point close your Internet session and then later re-start the voting process and re-enter your PIN and any other credentials required using your phone or cell phone and complete your ballot.