AT&T Z222 3G Network GoPhone - use as a trade in?

For sale is this AT&T Z222 GoPhone cell phone that I was able to use until AT&T discontinued 3G service. If you get this phone, it would be for the purpose to using it in another area where there is still 3G service. AT&T tells me that as of February 2022, it will no longer work in the San Diego area. Included along with the phone is the charger, box and all materials that came with the phone when I purchased it. This is a GoPhone that can be loaded with minutes or used on a cell phone plan. Everything works except the exterior screen which is blacked out. I was also told that phones like this can be used as a trade-in at T-Mobile. You should verify this with T-Mobile or your cell phone provider first. Just $25 for the whole set, cash only, please. Thanks for looking.