If your cell phone from ATT is broken you have a free phone upgrade credit available on another phone on this plan Can you use this credit to replace your phone vs the other phone?

yes,you should be able to ge another phone and not your old phone. If they say no then you go to costomer service! I have done this before, my old cell broke and i got a COOL new one + you probably should get a warrenty before you turn in your old broken phone for the new one. Then you would have better luck if your service doesn't coprate! Even if your service does i still would recomend doing that.