You will receive detailed instructions by e-mail on how to call via www.odorik.cz

Insert any phone numbers in the USA from which you are going to call.
You can call only from those numbers.

Insert a four digit password. You will need this for logging in to your account if you want to see your call history. If you do not want to make calls only from the predefined numbers, this four digits will be necessary for calls from any other telephone the world around.