About Mobile to Mobile calling

Learn about the two types of Mobile to Mobile calling and how to use our Mobile to Mobile Lookup Tool to verify if a wireless number qualifies.

Use the AT&T Mobile to Mobile Lookup Tool

Sign in to myAT&T to go to the Mobile to Mobile Lookup Tool. On the right of the Message Center page, enter the 10-digit wireless number to verify the number qualifies as a Mobile to Mobile call.

Learn about Mobile to Mobile calling and verify a number

Before you begin

M2M and M2AM are not available for AT&T PREPAID^SM (formerly GoPhone^®).

About Mobile to Mobile calls
With Mobile to Mobile calling you can make calls to or receive calls from other wireless numbers without using your Anytime minutes. To qualify, you must be within your rate’s calling area in the U.S., Puerto Rico, or U.S. Virgin Islands.

There are two types of Mobile to Mobile calling:

Mobile to Mobile (M2M) allows you to make calls to or receive calls from other AT&T wireless customers. Unlimited M2M calling is included with qualifying AT&T Nation, FamilyTalk, and Senior plans.
Mobile to Any Mobile (M2AM) allows you to make calls to or receive calls from any mobile number on any U.S. carrier. Unlimited M2AM calling features can be added to qualifying FamilyTalk and Individual Nation plans.

Important to know
International long distance calls and International roaming calls are not included. Calls to directory assistance, voicemail, and calls made to/received from mobile toll-free numbers, mobile chat lines, calling applications, numbers for call routing and call forwarding services, and machine-to-machine numbers are not included. Only numbers in the industry wireless number database that AT&T uses will be treated as a call to/from a mobile number. Numbers belonging to other carriers which are not in the industry wireless database and numbers not reported as wireless numbers are not included. Coverage is not available everywhere.

Main steps

Use the AT&T Mobile to Mobile Lookup Tool
From a desktop or tablet, follow these steps to use the Mobile to Mobile Lookup Tool to verify if a wireless number qualifies.

Go to Mobile to Mobile Lookup Tool.
On the right of the Message Center page, enter the 10-digit wireless number > Go.
The Lookup Tool will verify if the wireless number qualifies as a Mobile to Mobile or Mobile to Any Mobile call.

Additional steps

How to add Messaging Unlimited with Mobile to Any Mobile Calling
Go to My Wireless Services to add the following features to your existing qualified AT&T Nation and FamilyTalk plan:

Messaging Unlimited with Mobile to Any Mobile Calling
Family Messaging Unlimited with Mobile to Any Mobile Calling

Ineligible voice plans
Messaging Unlimited with Mobile to Any Mobile Calling features are not available for the following rate plans:

Nation with Canada
FamilyTalk Nation with Canada
Senior Nation
AT&T Viva Mexico
Puerto Rico Regional
Dobson/Alltel Legacy
Promotional plans

Last updated: December 7, 2022