In your travels you will encounter pay phones, hotel phones, and caseta de telefona [caseta telefonica].
There are pay phones everywhere you travel in Mexico. These phones are either coin or card operated. One should carry a $10 phone card at all times in case of emergency. There are a number of different phone companies in Mexico with Telmex appearing to become the dominant force. These phones have Telmex on the side.
When making a long distance call using coins you first dial the number then the operator will come on and tell you how much the call will cost. You then insert the coins and the operator will connect the call for you.
Telephone operators in Mexico speak Spanish.
Caseta de Telefona
These are telephone stations and are enclosed for privacy. These phones accept change as well as call-cards. They are generally more expensive than Telmex phones. You will generally only find these phones in tourist zones.
If you traveled to Mexico years ago you probably found that your hotel telephone was for local calls only. Things have changed and the majority if not all hotels have international calling now.
WARNING: Long-distance telephone calls from hotels can be very expensive. It is much cheaper to use a pay-phone. You need to purchase a Mexican phone-card, which you can get at most hotel stores or at local convenience stores.
If you are using a telephone device be sure and talk to your carrier before you leave about what costs what or you could be in for a big shock when you get your bill!