Starting Aug 3rd Mexico changed the way to dial within the country and also to Mexico from a foreign country. Mexico is moving to 10 digit dialing in Mexico and outside of Mexico.
BEFORE you dialed (+52) 1 for mobil and 10 digits
NOW you only dial +52 plus 10 digits
To call me at Playa Rentals & Sales you simply dial
+52 (984 135 41 29)
The plus indicates your country international calling access
Have a look at this graphic as well