Ooooh...touched on a sore subject for me there. I _HAD_ a 7797 phone, but the store I bought it from had gotten it from an AT&T provider, but it was compatible (at the time) with US Cellular. It worked great for a while, until some weirdness in the programming (due to being an AT&T phone on a non-AT&T carrier) it stopped working. I brought it back to the store, they sent it in to be fixed. I waited, waited, kept getting the run around until they finally said they LOST it (the Bastards!). Gave me a comsumerized style StarTac, the TimePort I believe, to replace it. It may have been newer, and "better", but I didn't care. I wanted my StarTac back, or an equivalent model back. I never even activated that phone.
TL;DR I too had a StarTac 7797...HAD being the operative word.