Can an ATT phone off the shelf be set up to redial, not an ATT customer?

My caller Id shows Invalid Number for incoming calls, even though it's a valid incoming call. The caller Id shows what I take to be the country code (

I just bought AT&T cordless phone system under a month ago, and one of the numerical keypads stays lit all the time. The other two phones do not

I have my phone language on French and I need English

I need to change the language on my phone to English on my at&t home phone. I can't understand the Language to change it back. At&t is no help at all.

How can I get call history of outgoing call from att home phone

The phone maddeningly rings all day, and I have blocked these same numbers years ago. Can I stop blocked phone numbers from ringing through?

I am receiving a call from a charity (Police Group) and I keep rejecting their request. I donate locally.  I've asked them repeatedly to take me

I accidentally pressed “delete “ to delete one single message and all of them, including my grandchildren’s first words were deleted. Are the messages

It's full. I don't have any #s in there in order to delete. How do I delete all?