Transfer up to five existing wireless numbers to your new AT&T service. In order to transfer your number(s), you'll need to enter some of the account information that your current wireless provider has on record. To ensure accuracy, please copy the necessary information exactly as it appears on a recent monthly bill or online statement from your current provider. We'll walk you through the process of transferring your number(s) and assigning them to your new AT&T line(s) of service after we process your checkout information.