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If you're switching to the AT&T cellular network, you'll need to know how to activate your new AT&T SIM card.

In this step-by-step guide, you'll find the information you need to activate both AT&T physical SIM cards and eSIMs.

How do I activate my AT&T SIM?

The process of activating your AT&T SIM depends on whether you have a physical SIM or an eSIM. Follow the respective instructions below:

Activating AT&T eSIM

Follow these simple steps:

  1. Order your AT&T eSIM plan.
  2. Power your phone on.
  3. Follow the on-screen instructions to complete the installation.

If you bring your own phone to AT&T, you'll need to request a new eSIM before activation.

Activating an AT&T physical SIM

Your SIM will typically come ready to go as soon as you insert it into your phone. If you need help, go to the AT&T activations website and follow the prompts.


Activating AT&T prepaid SIM card

There are three ways to activate your prepaid AT&T SIM card:

Activate AT&T SIM on your device:

  • Insert the SIM card.
  • Power your phone on.
  • Tap the link in the text message you receive.
  • Follow the prompts to complete activation.

Activate AT&T SIM online:

  • Have your ICCID (or SIM card number) & IMEI number handy.
  • Go to the AT&T prepaid activation page.
  • Follow the on-screen instructions.

Activate AT&T SIM by phone:

  • Find your ICCID or SIM and IMEI numbers.
  • Call 877-426-525 and follow the automated instructions.

Once you've activated your service, it's always smart to make a test call to make sure everything is in working order.


Cheaper AT&T phone plans

Do you want access to service on the AT&T wireless network without the sky-high phone bill that comes along with it?

Here's an insider tip - you can save up to $700 a year by switching to a low-cost carrier called an MVNO (Mobile Virtual Network Operator). AT&T prepaid SIM cards with MVNOs operate on the same 5G & 4G LTE wireless network, so you get the same quality at a fraction of the price.

We've done the cost-benefit analysis for you, so you can rest assured you're getting great value when you switch to a low-cost carrier.

MVNO advantages

Here's what you'll gain by switching:

  • No contract
  • Savings up to half compared to major carriers
  • Flexible plan options
  • Premium features like mobile hotspots & international calling
  • Freedom to switch carriers when you wish
  • Switch carriers and plans in a few clicks with AT&T eSIM plans

You can even check out prepaid SIM cards from MVNOs across all networks to see how much money you could save.


Activating your AT&T SIM card FAQs


Recap - How do I activate my AT&T SIM card?

The activation process for an AT&T SIM card is typically fast and easy. There are multiple ways to do so, giving you options based on your preferred method.

If you want to get more bang for your buck, consider switching to a low-cost carrier. You'll pay way less without sacrificing coverage and service quality. See our top recommendations for the best AT&T MVNOs and start saving now.

Verizon FAQs

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