Audiovox TX-120C for Sprint
https://gullfoss2.fcc.gov/prod/oet/forms/blobs/retri ... »
It's made by Curitel, the same company that makes the Audiovox 8900 for Verizon, hence the similar internal and rear appearance. "TX-95C" was the Curitel model number for that phone.
What makes you think this looks like a prototype, BTW?
the way it works is that audiovox builds a phone then it tests it out in it's labs. once that happends they then send iot off to sprint to test if sprint likes it they are given prototypes to test out. but those prototypes still have the clasic black label along with esns. and i know this for first hand because i deal with the developers on a regular baises
Anyway - whatever the reason, the kind of label you're seeing is standard for a phone being tested for FCC approval - they almost never have real labels.