How To Activate a AT&T Sim Card

How To Activate a AT&T Sim Card

What is AT&T Sim Card?

AT&T Inc. is an American multinational telecommunications holding company headquartered at Whitacre Tower in Downtown Dallas, Texas. It is the world’s third-largest telecommunications company by revenue and the largest wireless carrier in the United States.

How To Activate a AT&T Sim Card

Activate over the phoneCall us at 877.426. 0525 for automated instructions. You will need to know your SIM/eSIM ICCID & IMEI number for activation.

Frequently Asked Questiions

How do I reactivate my ATT SIM card?

AT&T physical SIM cards cannot be reactivated once deactivated. If you converted your physical Sim to an esim on your iPhone, that function should have worked if done correctly. You will have to call AT&T, from another phone if necessary to have them reactivate the esim with your current phone number.

What is the number for AT&T device activation?

For assistance in activating service on the new device and transferring the number, please call 800.331. 0500 or scroll down for Chat Live on the Contact Us page.

Why is my AT&T SIM card not working?

However, we highly recommend you remove the SIM, as damage isn’t the only thing that can cause those errors. If the SIM card reader is dirty, or has dust or debris in it, then it may be unable to read the SIM card. Try wiping down the SIM card with a small cloth, and use compressed air to clean out the SIM card slot.

Does AT&T SIM expire?

A prepaid account is automatically closed if the account balance is $0 for more than 60 days. Once your account is closed, the SIM card is deactivated. As noted above, you need to open a new account with a new SIM card and new number.

Why is my SIM card locked AT&T?

A SIM card lock keeps your device from being used on any other network except yours. For example, if you have wireless service with us, then your SIM lock prevents someone else from using your phone on a different carrier. It’s a security measure. Your SIM card may be locked by the phone’s manufacturer when you get it.

How many days is AT&T prepaid service?

The monthly service is a little easier it’s 30 days from the date your refill is used to pay for service. The account and balance expiration is different. Each refill extends the balance and the expiration of your account to a point in the future depending on how much your refill is.

How do you set up a AT&T prepaid?

Activate an AT&T Prepaid plan with a code

  1. Make sure the phone is turned on and the SIM card is inserted.
  2. Find the two-digit plan code on your phone package.
  3. Call 877.426. 0525 and after you hear the current list of plans, say Plan code.
  4. Provide the two-digit plan code and service ZIP Code to activate.

How do I check my AT&T balance?

Have an active AT&T Wireless device? Dial *225# (English) or *725# (Spanish) from your wireless device to get a text with your current balance, next bill due date, and last payment received.

How do I set up my AT&T account online?


  1. Go to the myAT&T sign-in.
  2. Select Add a user ID, then Create one now.
  3. Choose the service to register and select Continue.
  4. Enter your AT&T phone number or account number and your billing ZIP Code, then select Continue.
  5. Choose how you want to receive your verification code.

How do I check my AT&T data plan usage?

To see how much data you’ve used:

  1. Go to your myAT&T account overview. Sign in, if required.
  2. Scroll to My Internet, then select See usage details. You’ll see your current usage.