I'm not sure what you are asking. Since all the Satelite phones are exclusively in other countries (so your customers can only get the Russian or Chinese language version of your info) and the phone companies here even wireless want a subscriber fee or a per minute charge, you are gonna end up with a $1600 phone bill?
Or, you could find a local phone answering service for about $400 a month. Available in the phone book for your area.
People wanting to call an info line are not going to want to sign up for Skype or any other service just to hear your message.
Or just don't have one and use a web page or free myspace page exclusively but, again will the customers all sign up if not already a member to give a crap?
Perhaps for for $10 an hour a phone bank of Indian Service Representatives can answer. "My name is Mujibar and I am so happy to be scaring you today"
Another fabulous post from the U.S.Department of Wild Imaginings, now in spectaclar stereo, sponsored by the Adhesives and Sealants Council, suggesting ways to stick things together since the 1800s. Not fabulous in a gay way. Your results may vary. Illinois residents add 8% sales tax. These posts have been made by professional post makers, do not try this type of posting on your own without extensive training, lovely assistants and a trusty clown horn.