“We upgraded to new phones (KX-TGF975S) to be compatible with the AT&T upgrade to 5G. However, we cannot place or receive calls. Error message is: "The call you are attempting to place is not allowed from this line." I did all the trobleshooting. Help!”
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Hi! You will need to contact your phone company for further information, as it seems that the line does not support the call. -M
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