traveller22 wrote:

The plan they are referring to above is called, in Spanish, "Por Llamada". If you are going to be in one place for a while and need to make long calls to the US or Canada, this is a great deal. Here is the Telcel web page that shows the details (copy it and bring it with you to the Telcel shop).

http://www.telcel.com/portal/telcel.port........hContenido=%2Fcontenido%2Ftu_eliges.html

You can bring an unlocked cell phone with you (buy one on Craigslist for less than $100) or buy one there. The Telcel shop will help you to sign up for this plan and insert sim card in your phone. The one catch is, when you purchase this plan, the rates only apply from the area code you are registered in. If you call from another area code, you pay standard roaming rates. Good luck!

Moderator's edit: Converted the URL into a 'clickable' link.