TELEPHONE Local calls are cheap; international calls can be expensive, but with widely available discount cards they needna#39;t be. Calling ... Cell Phones Like other Mexican phone numbers, even Mexican cell phone (telefono celular) has an area code (usually the code of ... Much cheaper is to buy a local SIM card or a#39; chipa#39; from a Telcel or Movistar outlet. You can usually top these up online. A good source for further information on international mobile phone use is www .kropla. com.