How to Activate a Used iPhone

The Apple iPhone is a popular cell phone with an innovative touch-screen technology. Apple continues to improve this phone and release subsequent versions of the phone. Therefore, you may have been given or purchased an old iPhone. If you have someone's old iPhone, you will have to activate the phone under your name.

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Step

Go to the AT&T store and obtain a new SIM card. You will not be able to use a regular cell phone SIM card because the iPhone uses a specific SIM card.

Step

Insert your new SIM card. Unravel a paper clip and use the pointy end to release the SIM card holder. This bay is on the top of the iPhone, next to the headphone jack. Remove the old SIM card if it is still inside and place the new SIM card in the holder. Push the holder back into the iPhone.

Step

Connect your iPhone to your computer using the iPhone USB cable. This should automatically launch iTunes. If it does not, open iTunes.

Step

Click "Continue" when the activation screen appears.

Step

Select your AT&T status. You will need to choose between an existing customer or a new customer. Click "Continue."

Step

Transfer your mobile number if you are transferring your service to AT&T from another carrier. Enter the phone number, account number, zip code, and password from your existing phone.

Step

Choose an AT&T monthly plan and then click "Continue."

Step

Confirm your personal and billing information and click "Continue."

Step

Agree to the terms and conditions and click "Continue." You will be presented with a summary of your choices. Click "Submit" to activate the phone.