Yes, it is indeed possible to transfer an existing phone number to AT&T Wireline. This process is commonly referred to as number porting. When a customer wishes to keep their current phone number while switching to AT&T Wireline services, they can initiate this transfer during the sign-up process. It is important to ensure that the current service provider does not deactivate the number before the porting process is complete, as this could result in losing the phone number.
During the transfer, AT&T will typically require some information, including the existing account number and a PIN or password from the current service provider. The process may take anywhere from a few hours to a couple of days, depending on various factors such as the providers involved. It is advisable to double-check all details to facilitate a smooth transition. For additional information and specifics about the requirements, one can look on the official AT&T Wireline website to find current guidelines or contact information.