Post, Telephone, Fax, Internet Access ...
There is one postoffice in Ulan Baatar, it's on the peace avenue. You can buy postcards there, envelops,.... a stamp for a postcard to europe is 400 Tugrik (plus 60 Tugrik Tax) and a stamp for a letter 500 Tugrik (plus tax).
If you're going to live in mongolia you should know, that the streets in general ahve no name, so you can't recive letters at your homeadress, but your friends can send them to the postoffice to psot restante.
Internet: there are several internetcafes in Ulan Baatar.... sometimes very slow, but o.k.,... one hour costs between 600 and 800 Tugrik.
Telephone: on the other side of the department store on the right corner is the cheapest palce for international phone calls... sometimes it can happen that the connection breaks down, but in general it's o.k. there are also international calling cards to buy at the postoffice and special phoneboxes for this, but my cards never worked, I never found out what I did wrong.