Most of the expats or visitors from the US use their stateside cell phones when in Mexico. Before you leave the US, be sure to contact your cell provider to arrange for coverage during your travels. Longterm or for frequent travelers, it would make sense to purchase an "international calling plan."
The following is a cheat sheet to help make dialing easy and painless.
Call MX from US #
1. Mobile no. dial +52 then the 10-digit no.
2. Landline no. dial +52, 2-3 digit no., dial the 7-8 digit no.
Call US # from MX
When calling a US phone number while you're south of the border, dial 001, then the 10-digit phone number.
Call US toll-free #s
The secret to being able to call US toll-free numbers from Mexico is that you have to dial a different prefix.
Use the following combinations to refer to US toll-free nos. from Mexico:
1-800 number, replace it with 001 880
1-888 number, replace it with 001 881
1-877 number, replace it with 001 882
1-866 number, replace it with 001 883
1-855 number, replace it with 001 884
1-844 number, replace it with 001 885
1-833 number, replace it with 001 886
Then, dial the rest of the number as it is. You may get a recording that will inform you that "dialing this type of number will result in international calling rates" that you should disregard--rest assured, you won’t incur an extra charge on your bill. Again, it's best to check with your cell carrier to be sure your plan will give you access to US toll-free nos.
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