Hey there @JanetAguilarr!
Being able to manage your account online is definitely convenient. It will be my pleasure to help you set up this service!
If you don’t know your account number, you have the option to enter your mobile number instead. This excellent article walks you step-by-step through the entire process.
Once you register, please access this link, which shows you how to pay your wireless bill online, as well as it provides additional important details.
If you have any other questions, please don’t hesitate to let us know.
Have a fantastic weekend!
Anabel, AT&T Community Specialist