Check Device on an AT&T MVNO

Check if the subscribers device is listed as having been ported onto the AT&T network / an AT&T MVNO
The Check Device on an AT&T MVNO tool checks if the subscriber's phone device is connected to an AT&T MVNO and the AT&T network.
Tool Name
check_device_is_on_an_ATT_MVNO
Tool Functionality
- Check if a device is on an AT&T MVNO provider
Inputs
Subscriber's device IMEI
Outputs
If the device is on an AT&T MVNO, returns the carrier name, returns a message if the device is not on an AT&T MVNO
Example Prompt
"To diagnose subscriber problems, check that their device is on an AT&T MVNO provider."