Trade in

Accepted by who? USPS? That's a problem; you should go to the post office asap.

AT&T? Not an issue. As long as it's been received, it can take some time to be processed. That's why credits don't stop for 3 or 4 months.

Accepted by usps to deliver to at&t return center which it showed delivered to this last week. Hasn’t updated in at&t yet.

Because once it's received at the trade in warehouse, it doesn't mean it's accepted. You have to wait for them to inspect the devices.

Any suggestions what I should do now since I mailed my trade in phone on 12:/24 in the box provided by at and t and it is still in transit. I have the tracking number. I called at and t and was told to wait for at least 3 months so they can help me submit the claim. I called usps to track the package and all I got was the automated response that the package is in route. There is no live person that I could talk to, 

You mailed the devices and you have the proof which is the tracking number.. you now must wait 1-3 billing cycle for the tradein credits to show up - the mechanism of the devices being transferred to the tradein warehouse and inspected is none of your concern. You should just wait.

Thank you for the advice.