Att wireless home phone no longer working
I have an att wireless home phone ( black box) that stopped working on 03/10/2022. Att sent me a new box about 6 months ago telling me the equipment i had wouldn't work after 3 g was gone. The new box worked fine until 03/10/2022
Since then, i've received a new sim card, a new black box, an additional sim card. I have a dial tone and a the lights are all lit that says i have a signal, however, i can not make an out going call. This is a phone we use for work and we can not return client calls.
I have made easily 20 calls to ATT 'advanced technical support' Have opened two cases and talked to a bunch of people who tell me it will be fixed in 24 hours but now its' two months and we still can't make a call
does anyone have this issue?