I'm having troubles placing calls to Mexico, Argentina, or Brazil.

We are aware of some difficulty in placing calls to certain areas. Some additions may be needed when entering the phone number in an international format.

Calling a cell phone from outside of Mexico: Please add a 1 before the area code (e.g.: +52-1-624-166-6887).
Calling a cell phone from within Mexico: Please add 044 or 045, then the area code, then the number.

Argentina: Please add a 9 before the area code for calls to cell phones in Argentina.

Brazil: Please be sure to include the 2 digit area code before the 8 digit phone number.