Have you assigned an AT&T Wireless number to your user ID? You can use it to sign in to your account or for things like NumberSync pairing.

See if a number is assigned to your ID

  1. Go to your AT&T account profile. Sign in, if asked.
  2. Look for AT&T Wireless number. If you have a number there, there’s a wireless number assigned to your ID.

Update or remove the wireless number for your ID

You can only assign your wireless number to one user ID. If your number is already assigned to an ID, you must delete it from that ID before you can assign it to a different ID. The assigned number must be an AT&T Wireless number.

  1. Go to your AT&T account profile. Sign in, if asked.
  2. Locate AT&T Wireless number.
  3. Select Edit or Remove to update your number.
  4. Follow the prompts to complete your update.
  5. Save your changes.
Last updated: November 18, 2025

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