From searching, I think he has the inavi r11 air.Do you know what model is the multimedia system? It seems the system in your Sorento is not a genuine KIA system.
I read and speak Korean. If you let me know the exact model name, I can translate the blutooth setup section of the manual.
Probably there is a technical error in upgrading process. The texts in the photo reads:I get stucked in step 5, it showed a message for few seconds and closed