AT&T Prepaid Logo

Signing up for AT&T Prepaid wireless service is fast and easy. With a few simple steps, you can register your account on the AT&T Prepaid portal and start managing your new prepaid plan completely online. 

Follow this guide to learn how to quickly register your AT&T Prepaid Login account after activation.

Purchase Your AT&T Prepaid SIM Card

Before registering your AT&T Prepaid account, you’ll first need to purchase a compatible SIM card. AT&T Prepaid SIM card kits are available at AT&T retail stores, on the AT&T website, or at major retailers like Best Buy and Target.

SIM kits typically cost around $10. You can either purchase a SIM kit by itself or bundled with an AT&T Prepaid phone. Make sure to buy the right size SIM for your particular device.

Activate Your AT&T Prepaid Service 

Once you have your new AT&T Prepaid SIM in hand, you’ll need to activate the service on the account. 

You can activate it by:

  • Calling 611 from your AT&T Prepaid phone
  • Visiting an AT&T store 
  • Activating online at

When activating, you’ll need to provide your SIM number or device IMEI along with personal info like your ZIP code and last 4 digits of your SSN. After activation, your service will be live and ready to use.

Register Your Online Account

After activating the service, it’s time to register your online AT&T Prepaid account portal. 

  • Visit and click “Register” in the top right corner.
  • On the registration form, enter your newly activated 10-digit AT&T phone number and click “Continue.”
AT&T Prepaid Register

Next, fill in your account details:

  • Email address 
  • Password
  • Name
  • Billing address
  • Security prompts in case you forget your password

Read and accept the Terms & Conditions to complete registration.

Explore Your Account Dashboard

Once your AT&T Prepaid account is registered, you’ll be logged into your account dashboard. This dashboard provides an overview of your account details, including:

  • Account balance
  • Active plan details
  • Usage so far this month 
  • Payment status
  • Quick links for paying bills, checking usage, changing plans, and more

Take some time to explore all the account management features available through the online dashboard and mobile app:

  • Pay your bill with various payment methods  
  • Set up autopay with credit/debit card or PayPal
  • Monitor talk, text and data usage
  • Change monthly prepaid plan up or down
  • Add international calling, roaming, and other add-ons
  • Block/unblock phone numbers

Set Up Recurring Payments

One of the first things you’ll want to do is set up recurring payments through autopay. This ensures your service continues each month without lapsing.

  • On the dashboard, select “Pay Bill” then “Payment Methods.” Add your credit/debit card or PayPal account.
  • Next, go to “AutoPay” settings and enable autopay using your stored payment method. Choose your payment date each month.
  • With autopay set up, your monthly balance will be paid automatically on your set date.