I have a prepaid phone (30 DLLS PLAN) I am at Mexico Right now and need to call to US

are you dialing the full 11 digit number? 1 plus area code then number?

Yes, I tried but the call is not successful. It says call ended

what make and model phone? it may not be on at&t list of compatible phones

Motorola Moto G Pure

@formerlyknownas is that phone on the whitelist? im on my phone so dont have the links to the list

Moving this whole thread from Email to the Wireless forum.

I buy the prepaid at&t phone in Walmart

@Constructive Whether or not the phone is on the whitelist doesn’t matter if they are in Mexico. Besides, they can receive calls so whatever the issue, it’s not phone compatibility.

I can't say enough if you are still using your AT&T SIM card and service, and calling a US number, you do not need to dial the one. You call the US with the 10-digit phone number as usually would

800 numbers and short numbers like 611 and 811 will not work.

We understand the importance of being able to make calls from Mexico, @rirexport. 

The Ace's on this thread shared some really helpful information.

Here's how to call or text in Canada and Mexico with AT&T PREPAID: