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If this info is not available on the phone's "complete user's manual" at www.att.com/manuals then I would call the customer service number 1-800-222-3111 as listed on the Abridged user's manual which came in the box.
Sorry, there was a problem. Please try again later.I have fiber optics, so this wasn’t an issue for me-sorry, maybe the manufacturer’s website would have that answer, hopefully.
Sorry, there was a problem. Please try again later.
