Slow trade in

That is correct. USPS tracking shows both phones delivered to Dallas but the app states 'We'll review within 5 days of arrival" and then "Old device shipped". But going to "View tracking information" they both show as delivered.

@user_3ameqs trade-in can take some time. 

When you trade in your device with Xfinity Mobile, you can expect the following: After sending your old device, Assurant will evaluate its condition. If accepted, you’ll see your credit within one to two billing cycles. If the device is not in expected condition, you may receive an adjusted offer, which you can accept or reject within 14 days. Ensure you send your device within 21 days of receiving your new one and turn off the "Find My" feature to avoid cancellation of your trade-in.

For more details see:

• https://www.xfinity.com/support/articles/track-trade-in
• https://www.xfinity.com/support/articles/trade-in-old-phone